Metadata: Identification_Information: Citation: Citation_Information: Originator: Amit Millo Originator: Sandra M. Brosnahan Originator: Seth D. Ackerman Originator: Jin-Si R. Over Originator: Jennifer M. Cramer Publication_Date: 20260602 Title: Lidar point clouds (LPC), elevation models, GPS data, image mosaics, and aerial images from natural color (RGB) camera collected during UAS operations at Lower Darby Creek, Darby Township, Pennsylvania, March 2025 Edition: 1.0 Geospatial_Data_Presentation_Form: digital image, point cloud, raster, and tabular digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13TQ8E7 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P13TQ8E7 Online_Linkage: https://www.sciencebase.gov/catalog/item/69839c8ab66b01367d7ecd96 Larger_Work_Citation: Citation_Information: Originator: Amit Millo Originator: Sandra M. Brosnahan Originator: Seth D. Ackerman Originator: Jin-Si R. Over Originator: Jennifer M. Cramer Publication_Date: 2026 Title: Topographic data, aerial imagery, and GPS data collected during uncrewed aircraft system (UAS) operations at Lower Darby Creek, Darby Township, Pennsylvania, March to August 2025 Edition: 1.0 Geospatial_Data_Presentation_Form: digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13TQ8E7 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Millo, A., Brosnahan, S.M., Ackerman, S.D., Over, J.R., and Cramer, J.M., 2026, Topographic data, aerial imagery, and GPS data collected during uncrewed aircraft system (UAS) operations at Lower Darby Creek, Darby Township, Pennsylvania, March to August 2025: U.S. Geological Survey data release, https://doi.org/10.5066/P13TQ8E7 Online_Linkage: https://doi.org/10.5066/P13TQ8E7 Online_Linkage: https://www.sciencebase.gov/catalog/item/69612fbcd4be02298529c536 Description: Abstract: The U.S. Geological Survey deployed small uncrewed aircraft systems (sUAS) to collect aerial remote sensing data across sites within the Lower Darby Creek Superfund Site ~5 miles outside of Philadelphia, PA in March and August of 2025. March datasets include aerial images from natural color (RGB) and raw lidar of the Clearview Landfill superfund site. August datasets include aerial images from natural color (RGB), multispectral sensors, and raw lidar over the Clearview Landfill. These datasets were processed to produce high resolution digital elevation models (DEM), image mosaics, and lidar point clouds (LPC). Black and white cross-coded ground control points (GCPs) were surveyed using Real Time Kinematic (RTK) GPS and RTK-GPS enabled AeroPoints to georeference the model and orthomosaics during post-processing. The elevation and imagery products were produced to help partners at the Environmental Protection Agency (EPA) acquire accurate elevation data for target monitoring sites during the winter "leaf-off" period (March) and the peak growing season (August). Future data collections are planned to support long-term monitoring of landscape change resulting from remediation efforts and potential storm impacts. Purpose: Lidar data were collected to penetrate vegetation canopy and provide accurate digital terrain models (DTMs) during the winter "leaf-off" period. Aerial imagery was collected with appropriate resolution and overlap to permit high-quality photogrammetry and generation of digital surface models (DSM) and orthoimagery. Supplemental_Information: These data were collected by the USGS Coastal and Marine Hazards and Resources Program under USGS field activity number 2025-011-FA. The field activity webpage (https://cmgds.marine.usgs.gov/services/activity.php?fan=2025-011-FA) contains additional information regarding the field activity. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20250326 Ending_Date: 20250327 Currentness_Reference: Ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: Not planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -75.258575 East_Bounding_Coordinate: -75.247749 North_Bounding_Coordinate: 39.908567 South_Bounding_Coordinate: 39.897749 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Woods Hole Coastal and Marine Science Center Theme_Keyword: WHCMSC Theme_Keyword: Wingtra Lidar Theme_Keyword: Wingtra MAP61 Theme_Keyword: UAS Theme_Keyword: WingtraOne GEN II Theme_Keyword: Lidar Point Cloud Theme_Keyword: UAS Theme_Keyword: Aerial Images Theme_Keyword: JPEG Theme_Keyword: TIFF Theme_Keyword: Digital Terrain Model (DTM) Theme_Keyword: Digital Surface Model (DSM) Theme_Keyword: Orthomosaic Theme_Keyword: Emlid RS2+ Theme_Keyword: Emlid RS3 Theme_Keyword: RTK GPS Theme_Keyword: AeroPoints Theme_Keyword: Aerial Imaging and Mapping Group Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: remote sensing Theme_Keyword: lidar Theme_Keyword: visible light imaging Theme_Keyword: digital elevation models Theme_Keyword: structure from motion Theme_Keyword: image mosaics Theme_Keyword: geospatial datasets Theme_Keyword: image collections Theme_Keyword: GPS measurement Theme_Keyword: navigational data Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme_Keyword: elevation Theme_Keyword: environment Theme_Keyword: imageryBaseMapsEarthCover Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:69839c8ab66b01367d7ecd96 Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Commonwealth of Pennsylvania (1779798) Place_Keyword: Philadelphia County (1209187) Place_Keyword: Township of Darby (1216381) Place_Keyword: Darby Creek(1172928) Place: Place_Keyword_Thesaurus: None Place_Keyword: North America Place_Keyword: United States Place_Keyword: Lower Darby Creek Place_Keyword: Clearview Landfill Access_Constraints: No access constraints. Please see 'Distribution Information' for details. Use_Constraints: These data are marked with a Creative Commons CC0 1.0 Universal License. These data are in the public domain and do not have any use constraints. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. These data are not intended to be used for navigation. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Amit Millo Contact_Organization: U.S. Geological Survey, Northeast Region, Woods Hole Coastal and Marine Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2223 Contact_Electronic_Mail_Address: amillo@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/69839c8ab66b01367d7ecd96?name=2025MarchDarbyChildPage.jpg&allowOpen=true Browse_Graphic_File_Description: Sample of data collected during March 2025 field session. Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Agisoft Metashape Pro v. 2.3.0, Trimble PosPac UAV v. 9.0, WingtraHub v. 2.20.2, Wingtra LIDAR app v. 1.10.1.0, Global Mapper Pro v. 26.1 Cross_Reference: Citation_Information: Originator: Jin-Si R. Over Originator: Andrew C. Ritchie Originator: Christine J. Kranenburg Originator: Jenna A. Brown Originator: Daniel D. Buscombe Originator: Tom Noble Originator: Christopher R. Sherwood Originator: Jonathan A. Warrick Originator: Phillipe A. Wernette Publication_Date: 2021 Title: Processing coastal imagery with Agisoft Metashape Professional Edition, version 1.6-Structure from motion workflow documentation Series_Information: Series_Name: Open-File Report Issue_Identification: 2021-1039 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: This publication includes the general methodology for processing imagery in Metashape to produce digital surface models and ortho products. Online_Linkage: https://doi.org/10.3133/ofr20211039 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: GPS: The theoretical internal accuracy of the Emlid RS3 is 2 cm. Points were assumed to be within that tolerance after staking out a known reference mark and the values were within 2 cm. The vertical and horizontal root mean square errors (RMS) for each point were also reported in 2025011FA_Clearview_Mar_Emlid_RTK.csv. The AeroPoint2 GCPs have an internal reported variance provided in 2025011FA_Clearview_Mar_GCP.csv. The global accuracy was calculated and reported below by adding the variance to twice the longest baseline distance. Some AeroPoint2s were also surveyed by the RS3. GeoTIFFs: The horizontal and vertical accuracy of the products (2025011FA_Clearview_Mar_WLDR_DSM_10cm.tif, 2025011FA_Clearview_Mar_WLDR_DTM_10cm.tif, and 2025011FA_Clearview_Mar_MAP61_Ortho_5cm.tif) were assessed using the AeroPoint2 ground control points (GCPs) and check points. It should also be noted that accuracy estimates of the products are for areas of bare ground or low vegetation where GCPs were placed or check points taken. Additional sources of error, such as moving objects, may cause accuracy estimates to exceed estimates in localized portions of the products. Lidar: The point cloud (2025015FA_Clearview_Mar_WLDR_LPC.laz) positional accuracy is based on the GPS/IMU and post positional corrections from the base station but the vertical point spread on a flat surface is about 8 cm. The LPC was colorized from the SfM orthomosaic. Some misalignment in the collected lidar strips may occur. Lidar does not pass through water. Users are advised to evaluate the data for their own needs. Logical_Consistency_Report: There were two UAS flights and ten AeroPoint2 GCPs. Flight one (20 min) used the MAP61 camera module on the WingtraOne GEN II to collect RGB images that were used to generate the orthomosaic. Flight two (17 min) collected lidar data (WLDR) and produced the lidar point cloud (LPC), digital surface model (DSM), and digital terrain model (DTM). An Emlid RS2+ was set up as a base station and an Emlid RS3 GPS unit was used to collect check points. Completeness_Report: Imagery: The MAP61 camera triggered based on GNSS location, but roughly every 2 seconds. Images were only taken over the area of interest for a total of 458 MAP61 images. Products: GeoTIFF products are cloud-optimized and deflate compressed. The LPC has been cleaned in Global Mapper to obvious noise (like birds). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Images: The Wingtra MAP61 images were geotagged in WingtraHub v. 2.18.0 using base station data and had an average xy accuracy of 0.03 m. GPS: Emlid RS3 GPS points have an xy RMS (precision) average of 1.7 cm. AeroPoint2 horizontal global accuracy is 4.3 cm. Lidar: The lidar point cloud, and by association the DSM, horizontal accuracy was assessed against positions of the AeroPoint2s in the lidar intensity view (not the RGB). The horizontal accuracy is variable and within 10 cm. SfM: The orthomosaic was created using SfM and georeferenced as a result of using Post-Processed Kinematic (PPK) geotagged aerial images (done so in WingtraHub). The horizontal average camera location errors as reported from the Metashape projects were x/y 0.033/0.038 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Images: The MAP61 images were geotagged in WingtraHub v. 2.18.0 using the base station data and had an average x/y accuracy of 0.02m and z accuracy of 0.03 m. GPS: Emlid RS3 GPS points have a z RMSE (precision) average of 1.1 cm. AeroPoint2 global vertical accuracy is 7.0 cm. Lidar: The DSM was assessed against the elevations of the AeroPoint2s and RS3 check points: the RMSE (n=125) was 0.03 m. Lineage: Process_Step: Process_Description: GROUND CONTROL: Over the two days of data collection, 20 AeroPoint2 GCPs were spaced out over the field site and left on for at least 30 minutes to collect GNSS data. One Aeropint failed on day one so only 19 are recorded. After collection the AeroPoint2s data were uploaded via a Wi-Fi connection and run through a post-processing kinematic algorithm of the Propeller network to get corrected positions. The data were exported in NAD83(2011) (EPSG:6318) to produce latitude, longitude, and ellipsoid heights, and then NAD83(2011)/UTM zone 18N (EPSG:6347) and NAVD88 (EPSP:5703) with GEOID 18 to produce easting and northing and orthometric heights. These were exported to a CSV file and named 2025011FA_Clearview_Mar_GCP.csv. An Emlid RS2+ was set up as a base station using an RTK FIX on the highest section of boardwalk to record GNSS data for post processing the lidar data. An Emlid RS3 with tilt compensation was connected to the base to take RTK three-second averaged check shots the parking lot, beach, and AeroPoint2s, data were provided in 2025011FA_Clearview_Mar_Emlid_RTK.csv UAS FLIGHTS: The lidar sensor was a 905 nm wavelength Hesai XT32-M2X with a 90 / 40.3 degree horizontal and vertical field of view (FOV). It is a rotating sensor, generating up to three returns with an effective point rate for a single return of 160k pts/s. The camera module uses the Wingtra MAP61 61-megapixel (MP) camera with a 17 mm lens. The system uses a NovAtel OEM7500 multi-frequency, high precision GNSS receiver. The lidar data was saved to the 256 GB thumb drive in eight different *.data files. The RGB images are saved as *.JPG files. The lidar data were collected with the Wingtra UAS flying 61 meters above ground level with northeast-southwest transect passes. The camera module was set to take images based on GNSS coordinates calculated by Wingtra based on the flight area. After the flights the lidar and RGB data were taken off their respective sensor. Note, the geotagged positions embedded in the imagery Exif information were in EPSG:4326, this is the only option in the software. The positions were converted to EPSG:6347 and EPSG:5703 in the imagery locations file (2025011FA_Clearview_Mar_ImageryLocations.csv) and were accounted for when transforming to EPSG:6347 and EPSG:5703 in the products. Process_Date: 20250327 Process_Step: Process_Description: RAW IMAGERY: The W1G2 images were geotagged in WingtraHub using the base station RINEX file and OPUS corrected location of the base. All images were processed to add additional information required by the USGS to the Exif headers using ExifTools (https://exiftool.org/, version: 12.06), and the files were renamed to a unique identifier to avoid any possibility of duplicate names. These steps are described here. 1. ExifTools was used to tag each photo headers following the Imagery Data System EXIF Guidance. Attributes (e.g. Credit, Copyright, UsageTerms, ImageDescription, Artist, etc) were stored in a csv file and written to each image with the command:' exiftool -csv="C:\directory\name\EXIF.csv" C:\directory\name\of\photos *.JPG ' To read out the photo information to a csv when in the directory with the photos the command is: exiftool -csv *.JPG > directory\name\allheaders_out.csv 2. All the images were renamed using a Python script to ensure unique filenames and compliance with the USGS Coastal and Marine Hazards and Resources Program's best practices for image naming convention. Images were renamed with the field survey ID prefix; flight number, and ID that distinguishes USGS cameras by make/camera number, the image acquisition date, coordinated universal time (UTC) in ISO8601 format, and a suffix with the original image name. For example, image name '2025011FA_f13MAP61_20250327T164058Z_#####', 2025011FA is the field activity ID; f13 is the flight number for that day; MAP61 is camera used; 20250327 is the UTC date in the format YYYYMMDD, and a 'T' is used to separate UTC date from UTC time in format HHMMSS followed by a Z. The ##### is the original raw photo suffix appended to the end of the new filename. 3. Images are validated and uploaded onto the Imagery Data System. Process_Date: 20250710 Process_Step: Process_Description: PHOTOGRAMMETRY: The ortho product was created in Agisoft Metashape v. 2.2.0 using the following general steps (see Over and others, 2021 for a more detailed SfM methodology explanation): 1. A project was created and imagery was imported along with a csv file containing the following information about the camera when the image was taken: latitude/longitude (WGS84), ellipsoid altitude (m), vertical and horizontal accuracy (m), omega/phi/kappa (°), and accuracy (°). 2. Photos were aligned at a high accuracy using a keypoint limit of 60,000 and unlimited tie points. 3. The alignment process matched pixels between images to create point clouds and put the imagery into a relative spatial context using the PPK geotagged image locations. The resultant point clouds were filtered using one iteration of the 'Reconstruction uncertainty' filter at a level of 10, one iteration of the 'Projection accuracy' filter at a level of 10, and multiple iterations of the 'Reprojection accuracy' filter to get to a level of 0.3. With each filter, iteration points are selected, deleted, and then the camera model was optimized to refine the focal length, cx, cy, k1, k2, k3, p1, and p2 camera model coefficients. 4. In a new chunk a high-quality dense cloud with a low-frequency filtering algorithm was made. The dense point cloud was then edited by visual inspection to remove points with a low confidence near the edges and near water bodies. 5. An interpolated DSM was built from the dense point cloud and then an orthomosaic was built from the DSM with refined seamlines. This DSM was then used to generate the orthomosiac, which consists of 3-bands and was exported at 5 cm resolution (2025011FA_Clearview_Mar_MAP61_Ortho_5cm.tif). Step processed by J. Cramer. Process_Date: 20250716 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Jen Cramer Contact_Organization: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: U.S. Geological Survey Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The contact email address is a generic address in the event the person is no longer working at USGS. Process_Step: Process_Description: LIDAR DATA: The lidar data were processed in the Wingtra LIDAR app. The .data files were uploading into the app along with the base station RINEX *.25O file. The OPUS corrected location of the base and the ARP-APC offset were then entered manually. After the processing was complete, the start and end location of each transect was manually identified to clip the paths and remove points obtained when the aircraft was turning. This point cloud product was exported from the Wingtra LIDAR app and was brought into Global Mapper (GM) and manually cleaned of points interpreted to be noise. The LPC was colorized in GM with the SfM orthomosaic. Then, the LPC was gridded at 25 cm into a DSM using maximum values binning grid method and the setting 'Grid "No Data" Distance' set to 0, along with a 10 cm DTM generated using TIN gridding; the resulting file was exported as 2025011FA_Clearview_Mar_WLDR_DSM_10cm.tif. and 2025011FA_Clearview_Mar_WLDR_DTM_10cm.tif. The LPC was exported as 2025015FA_Clearview_Mar_WLDR_LPC.laz. All files were exported in EPSG:6347 and EPSG:5703 using GEOID 18. Process_Date: 20250716 Process_Step: Process_Description: CLOUD OPTIMIZATION: The DSM and DTM were deflate compressed and turned into a cloud-optimized GeoTIFF (cog) using gdal_translate with the following command: for %i in (.\*.tif) do gdal_translate %i .\cog\%~ni_cog.tif -of COG -stats -co BLOCKSIZE=256 -co COMPRESS=DEFLATE -co PREDICTOR=YES -co NUM_THREADS=ALL_CPUS -co BIGTIFF=YES (v. 3.1.4 accessed October 20, 2020 https://gdal.org/). Where i is the name of each GeoTIFF section. The orthomosaic was JPEG compressed and turned into a cog using gdal_translate with the following command: for %i in (.\*.tif) do gdal_translate %i .\%~ni_cog.tif -of COG -stats -co BLOCKSIZE=256 -co COMPRESS=JPEG -co QUALITY=90 -co PREDICTOR=YES -co NUM_THREADS=ALL_CPUS -co BIGTIFF=YES Process_Date: 20250716 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Amit Millo Contact_Organization: U.S. Geological Survey, Woods Hole Coastal and Marine Science Center Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: U.S. Geological Survey Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2223 Contact_Electronic_Mail_Address: amillo@usgs.gov Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 18 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -75.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: row and column Coordinate_Representation: Abscissa_Resolution: 0.001 Ordinate_Resolution: 0.001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 (National Spatial Reference System 2011) Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar_ImageryLocations.csv Entity_Type_Definition: The CSV file contains the approximate position of the W1G2 MAP61 images at the moment of each capture based on post-processed UAS integrated GPS. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: ImageName Attribute_Definition: File names of individual images, see the Process Description for file naming convention. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Character string. Attribute: Attribute_Label: GPSDateTime Attribute_Definition: Date and time of each image in the format YYYY:MM:DD HH:MM:SSZ where YYYY is the four-digit year, MM the two-digit month, DD the two-digit day, HH the two-digit the hour, MM the two-digit the minute, SS the two-digit seconds, and a Z follows at the end to represent Zulu time. Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Character string. Attribute: Attribute_Label: Latitude [EPSG:6319] Attribute_Definition: Latitude (y) in WGS84 of camera based on time of each image capture. Positive values represent north coordinates. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 39.89907309 Range_Domain_Maximum: 39.90685538 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude [EPSG:6319] Attribute_Definition: Longitude (x) in WGS84 of camera based on time of each image capture. Negative values represent west coordinates. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -75.25760886 Range_Domain_Maximum: -75.25060402 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Ellipsoid height (m) [GRS 1980] Attribute_Definition: Ellipsoid elevation (in meters) of the camera at time of each image capture. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 23.0889 Range_Domain_Maximum: 50.3828 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Easting (m) [EPSG:6347] Attribute_Definition: Easting coordinate in NAD83(2011) / UTM zone 18N of the image in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 477979.2122 Range_Domain_Maximum: 478578.7791 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Northing (m) [EPSG:6347] Attribute_Definition: Northing coordinate in NAD83(2011) / UTM zone 18N of the image in meters. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4416586.455 Range_Domain_Maximum: 4417449.782 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Orthometric height (m) [NAVD88, GEOID18] Attribute_Definition: Orthometric elevation in meters of the camera at time of each image capture. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 56.05153738 Range_Domain_Maximum: 83.34749193 Attribute_Units_of_Measure: meters Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar_GCP.csv Entity_Type_Definition: Comma Separated Value (CSV) file containing GNSS related data generated by the AeroPoint2s. Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: FAN Attribute_Definition: USGS Field Activity Number Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2025-011-FA Enumerated_Domain_Value_Definition: Year, USGS ID, and Field Activity Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Date Attribute_Definition: Date of each image in the format YYYYMMDD where YYYY is the four-digit year, MM the two-digit month, DD the two-digit day. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20250326 Range_Domain_Maximum: 20250327 Attribute: Attribute_Label: Point ID Attribute_Definition: Abbreviated reference for each Aeropoint2 datapoint used in this field session. A points were collected day one and B points day 2. The number following the letter is unique per day. Attribute_Definition_Source: Processor defined Attribute_Domain_Values: Unrepresentable_Domain: Character string. Attribute: Attribute_Label: Aeropoint ID Attribute_Definition: Unique identifier for each ground control point. Attribute_Definition_Source: Processor defined Attribute_Domain_Values: Unrepresentable_Domain: Character string. Attribute: Attribute_Label: Easting (m) [EPSG:6347] Attribute_Definition: Post-processed X-coordinate of AeroPoint2 in NAD83(2011)/UTM Zone 18N Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 478020.567 Range_Domain_Maximum: 478459.492 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Northing (m) [EPSG:6347] Attribute_Definition: Post-processed Y-coordinate of AeroPoint2 in NAD83(2011)/UTM Zone 18N. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4416640.164 Range_Domain_Maximum: 4417373.679 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Orthometric height (m) [NAVD88, GEOID18] Attribute_Definition: Post-processed Z-coordinate of AeroPoint2 using NAVD88 with GEOID 18 applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.486 Range_Domain_Maximum: 31.823 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Latitude [EPSG:6319] Attribute_Definition: Post-processed latitude of AeroPoint2 position in NAD83(2011). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 39.89955692 Range_Domain_Maximum: 39.90616973 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude [EPSG:6319] Attribute_Definition: Post-processed longitude of AeroPoint2 position in NAD83(2011). Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -75.25712572 Range_Domain_Maximum: -75.2519984 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Ellipsoid height (m) [GRS 1980] Attribute_Definition: Post-processed height in meters of AeroPoint2 in relation to the NAD83(2011) reference ellipsoid GRS80. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -29.478 Range_Domain_Maximum: -1.143 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: X variance (mm) Attribute_Definition: Variance in the X-coordinate from post-processing Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.9 Range_Domain_Maximum: 8.4 Attribute_Units_of_Measure: millimeters Attribute: Attribute_Label: Y variance (mm) Attribute_Definition: Variance in the Y-coordinate from post-processing Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.7 Range_Domain_Maximum: 8.0 Attribute_Units_of_Measure: millimeters Attribute: Attribute_Label: Z variance (mm) Attribute_Definition: Variance in the Z-coordinate from post-processing Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3.2 Range_Domain_Maximum: 18.2 Attribute_Units_of_Measure: millimeters Attribute: Attribute_Label: Baseline distance (km) Attribute_Definition: Distance of AeroPoint2 from nearest used processing network base station Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.09 Range_Domain_Maximum: 13.89 Attribute_Units_of_Measure: kilometers Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar_Emlid_RTK.csv Entity_Type_Definition: Comma Separated Value (CSV) file containing data collected by the Emlid Rover. Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: FAN Attribute_Definition: USGS Field Activity Number Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2025-011-FA Enumerated_Domain_Value_Definition: Year, USGS ID, and Field Activity Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Date Attribute_Definition: Date of each image in the format YYYYMMDD where YYYY is the four-digit year, MM the two-digit month, DD the two-digit day. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20250306 Range_Domain_Maximum: 20250306 Attribute: Attribute_Label: Name Attribute_Definition: Abbreviated reference for each Aeropoint2 datapoint used in this field session. A represents that the points were collected day one and the number following the letter is unique per check point. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: Character string. Attribute: Attribute_Label: Attributes Attribute_Definition: Additional information assigned to each GPS check shot while collecting the data. "Base location" represents the entered location of the base station. "Transect" represents checkshots taken with the rover to compare the elevations of the LPC. Target represents checkshots taken over the center of an AeroPoint to validate its location. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: Character string. Attribute: Attribute_Label: Easting (m) [EPSG:6347] Attribute_Definition: Post-processed X-coordinate of check point in NAD83(2011)/UTM Zone 18N Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 478058.978 Range_Domain_Maximum: 478302.016 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Northing (m) [EPSG:6347] Attribute_Definition: Post-processed Y-coordinate of check point in NAD83(2011)/UTM Zone 18N Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 4416843.173 Range_Domain_Maximum: 4417122.027 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Orthometric height (m) [NAVD88, GEOID18] Attribute_Definition: Post-processed Z-coordinate of check shot using NAVD88 with GEOID 18 applied. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 9.666 Range_Domain_Maximum: 31.796 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Latitude [EPSG:6319] Attribute_Definition: Post-processed latitude of check point position in NAD83(2011). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -75.25667668 Range_Domain_Maximum: -75.25383907 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Longitude [EPSG:6319] Attribute_Definition: Post-processed longitude of check point position in NAD83(2011). Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 39.901383 Range_Domain_Maximum: 39.90390042 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: Ellipsoid height (m) [GRS 1980] Attribute_Definition: Post-processed height in meters of check point in relation to the NAD83(2011) reference ellipsoid GRS80. Attribute_Definition_Source: USGS Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -23.299 Range_Domain_Maximum: -1.169 Attribute_Units_of_Measure: meter Attribute: Attribute_Label: Tilt angle (deg) Attribute_Definition: Angle to nadir of the Emlid RS3 Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NA Enumerated_Domain_Value_Definition: No Data Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.3 Range_Domain_Maximum: 5.3 Attribute_Units_of_Measure: degrees Attribute: Attribute_Label: Elevation RMS (m) Attribute_Definition: Root mean square in the Z-coordinate Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NA Enumerated_Domain_Value_Definition: No Data Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.011 Range_Domain_Maximum: 0.013 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Lateral RMS (m) Attribute_Definition: Root mean square in the horizontal XY-coordinate Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NA Enumerated_Domain_Value_Definition: No Data Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.017 Range_Domain_Maximum: 0.019 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Baseline (m) Attribute_Definition: Straight line distance of check point from base station in meters. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NA Enumerated_Domain_Value_Definition: No Data Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.61 Range_Domain_Maximum: 340.305 Attribute_Units_of_Measure: meters Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar_WLDR_LPC.laz Entity_Type_Definition: UAS lidar point cloud in *.laz v. 1.4 file format. This georeferenced point cloud was colorized using natural color RGB image values and is not classified. There are 86,181,891 points. Point density is 224.54 points per square meter and point spacing is 0.0667 m. Entity_Type_Definition_Source: Wingtra Attribute: Attribute_Label: Elevation Attribute_Definition: Surface elevation orthometric height NAVD88 (m) using Geoid 18 in NAD83(2011)/UTM Zone 18N. Attribute_Definition_Source: Wingtra Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.271 Range_Domain_Maximum: 34.829 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: Return Number Attribute_Definition: The sequence index of a lidar return within a single emitted pulse, indicating the order in which reflections were received. Attribute_Definition_Source: Wingtra Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 3 Attribute: Attribute_Label: Intensity Attribute_Definition: The return strength of a laser beam during data collection. Attribute_Definition_Source: Wingtra Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute: Attribute_Label: Class Code Attribute_Definition: The LPC is unclassified so the class code is 1 for all points. Attribute_Definition_Source: Wingtra Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 1 Attribute: Attribute_Label: Scan Angle Attribute_Definition: The angle at which a laser pulse is emitted from a scanner, measured relative to a nadir position. Attribute_Definition_Source: Wingtra Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -43 Range_Domain_Maximum: 45 Attribute: Attribute_Label: Point Source Attribute_Definition: Point source is the origin of each lidar return, representing the specific sensor emission event from which the point was derived. Attribute_Definition_Source: Wingtra Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 31 Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar_MAP61_Ortho_5cm.tif Entity_Type_Definition: Cloud-optimized JPEG compressed true-color orthomosaic. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Band_1 Attribute_Definition: Red wavelength band Attribute_Definition_Source: Agisoft Metashape Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute: Attribute_Label: Band_2 Attribute_Definition: Green wavelength band Attribute_Definition_Source: Agisoft Metashape Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Attribute: Attribute_Label: Band_3 Attribute_Definition: Blue wavelength band Attribute_Definition_Source: Agisoft Metashape Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 255 Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar2024_WLDR_DSM_10cm.tif Entity_Type_Definition: A cloud-optimized digital surface model gridded using the Minimum Binning (DSM) method in Global Mapper from the "2025011FA_Clearview_Mar_WLDR_LPC" lidar point cloud with encoded elevation values. Pixel resolution is 10 cm. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Value Attribute_Definition: Surface elevation orthometric height NAVD88 (m) using Geoid 2018 in NAD83(2011) UTM Zone 18N. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.271 Range_Domain_Maximum: 34.829 Attribute_Units_of_Measure: meters Detailed_Description: Entity_Type: Entity_Type_Label: 2025011FA_Clearview_Mar2024_WLDR_DTM_10cm.tif Entity_Type_Definition: A cloud-optimized digital terrain model gridded using the Triangulated Irregular Network (TIN) method in Global Mapper from the "2025011FA_Clearview_Mar_WLDR_LPC" lidar point cloud with encoded elevation values. Pixel resolution is 10 cm. Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: Value Attribute_Definition: Surface elevation orthometric height NAVD88 (m) using Geoid 2018 in NAD83(2011) UTM Zone 18N. Attribute_Definition_Source: producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.7773 Range_Domain_Maximum: 31.9003 Attribute_Units_of_Measure: meters Overview_Description: Entity_and_Attribute_Overview: The filenames are formatted as "2025011FA_Clearview_Mar_Sensor_Product_Resolution.*", where 2025011 is the USGS Field activity ID, Clearview is the location, and Mar is the data collection month; sensor includes the Wingtra MAP61 (MAP61), Wingtra Lidar (WLDR), Emlid RS3 (Emlid), and AeroPoint2s (GCP); products include orthomosaic (Ortho), digital surface model (DSM), digital terrain model (DTM) and lidar point cloud (LPC). The horizontal coordinate reference system for all products is NAD83(2011)/UTM18N, the vertical coordinate reference system is NAVD88 using GEOID 18. Image location coordinate reference systems are specific to the sensor and can be viewed in the image locations CSV files. Entity_and_Attribute_Detail_Citation: The entity and attribute information were generated by the data release first author, unless otherwise noted. Please review the rest of the metadata record for additional details and information. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - ScienceBase Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: Aerial imaging and mapping of The Darby Creek Superfund Site includes a lidar point cloud, two elevation models, one natural color orthomosaic, associated imagery, ground control, and check points. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: GeoTIFF Format_Version_Number: 1.0.0 Format_Specification: Cloud optimized GeoTIFF deflate (ZIP) compressed Format_Information_Content: 2025011FA_Clearview_Mar_DSM_10cm.tif (147 MB) and 2025011FA_Clearview_Mar_DTM_10cm.tif (89 MB) are digital elevation models. 2025011FA_Clearview_Mar_MAP61_Ortho_5cm.tif (582 MB) is an orthomosaic. Transfer_Size: 818 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://doi.org/10.5066/P13TQ8E7 Access_Instructions: The first link in the list above is to the child page where files can be downloaded individually, the second link is to directly download all the data on the page, and third link is to the doi to the main publication. Digital_Form: Digital_Transfer_Information: Format_Name: CSV Format_Version_Number: Exported from Excel Office 365 16.01 Format_Information_Content: 2024011FA_Clearview_Mar_GCP.csv (.003 MB) and 2025011FA_Clearview_Mar_Emlid_RTK.csv (.013 MB) contains ground control data and checkpoint data respectively. 2025011FA_Clearview_Mar_ImageryLocations.csv (.062 MB) contain a list of the MAP61 images and their positions. Transfer_Size: 0.078 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://doi.org/10.5066/P13TQ8E7 Access_Instructions: The first link in the list above is to the child page where files can be downloaded individually, the second link is to directly download all the data on the page, and third link is to the doi to the main publication. Digital_Form: Digital_Transfer_Information: Format_Name: JPEG Format_Version_Number: 1.0.0 Format_Information_Content: The natural color (RGB) images from the MAP61 camera module. Transfer_Size: 12700 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://doi.org/10.5066/P13DBRZV Network_Resource_Name: https://doi.org/10.5066/P13TQ8E7 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/69839c8ab66b01367d7ecd96 Access_Instructions: The first link in the list above is to the child page where a link to the Imagery Data System landing page can be found, the second link is to the Imagery Data System landing page where the photos can be viewed and downloaded individually, the third link is the doi redirect link to the data release landing page. The fourth link directly downloads all the data hosted on the ScienceBase page; however, due to the large total file size, this link does not currently work and is included in case it works in the future. Transfer size refers to the total size of all images if downloaded from the IDS, images are not hosted on ScienceBase. Digital_Form: Digital_Transfer_Information: Format_Name: LAZ Format_Version_Number: 1.4 Format_Information_Content: LAZ (LAserZipped) is an open file format intended for point data records. File_Decompression_Technique: Use laszip to decompress Transfer_Size: 849 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/item/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/69839c8ab66b01367d7ecd96 Network_Resource_Name: https://doi.org/10.5066/P13TQ8E7 Access_Instructions: The first link in the list above is to the child page where files can be downloaded individually, the second link is to directly download all the data on the page, and third link is to the doi to the main publication. Fees: None. Metadata_Reference_Information: Metadata_Date: 20260602 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Amit Millo Contact_Organization: U.S. Geological Survey, Northeast Region Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical Address: U.S. Geological Survey Address: 384 Woods Hole Rd. City: Woods Hole State_or_Province: MA Postal_Code: 02543-1598 Contact_Voice_Telephone: 508-548-8700 x2223 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Access_Constraints: None Metadata_Use_Constraints: None