Water level data for five sites in the coastal marsh at Grand Bay National Estuarine Research Reserve, Mississippi, from August 2021 through January 2023

Frequently anticipated questions:

• What does this data set describe?
  1. How might this data set be cited?
  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
• How reliable are the data; what problems remain in the data set?
  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

What does this data set describe?

1. How might this data set be cited?
   Terrano, Joseph F., Smith, Kathryn E.L., Ellis, Alisha M., Pitchford, Jonathan, and Archer, Michael, 20250527, Water level data for five sites in the coastal marsh at Grand Bay National Estuarine Research Reserve, Mississippi, from August 2021 through January 2023:.

   This is part of the following larger work.
   Terrano, Joseph F., Ellis, Alisha M., Smith, Kathryn E.L., Pitchford, Jonathan, Archer, Michael, Vargas, Joseph M., Griffiths, Jonathan P., Randall, Samuel M., Virden, Matthew, Everhart, Cheyenne S., and Sparks, Eric, 20250527, Shore Proximal Marsh Sediment Deposition and Ancillary Data From Grand Bay National Estuarine Research Reserve, Mississippi, From October 2020 to January 2023: U.S. Geological Survey data release doi:10.5066/P13VT3ET, U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center, St. Petersburg, FL.

   Online Links:

   • https://doi.org/10.5066/P13VT3ET

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -88.4474
   East_Bounding_Coordinate: -88.4435
   North_Bounding_Coordinate: 30.3370
   South_Bounding_Coordinate: 30.3337
   

3. What does it look like?

   21CCT03_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 21CCT03 as a Hypertext Markup Language (HTML) file. Includes sites 5-8.

   21CCT05_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 21CCT03 as a Hypertext Markup Language (HTML) file. Includes sites 5-9.

   22CCT01_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 22CCT01 as a Hypertext Markup Language (HTML) file. Includes sites 5-9.

   22CCT03_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 22CCT03 as a Hypertext Markup Language (HTML) file. Includes sites 5-9.

   22CCT05_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 22CCT05 as a Hypertext Markup Language (HTML) file. Includes sites 5-9.

   22CCT07_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 22CCT07 as a Hypertext Markup Language (HTML) file. Includes sites 5-9.

   23CCT01_water_level_NOAAcorr.html (HTML)

   Line graph of water levels corrected using NOAA data for 23CCT01 as a Hypertext Markup Language (HTML) file. Includes sites 5-8.

4. Does the data set describe conditions during a particular time period?

   Beginning_Date: 07-Aug-2021

   Beginning_Time: 0000
   

   Ending_Date: 02-Feb-2023

   Ending_Time: 1745
   

   Currentness_Reference:

   ground condition

5. What is the general form of this data set?

   Geospatial_Data_Presentation_Form: tabular digital data
   

6. How does the data set represent geographic features?
   1. How are geographic features stored in the data set?
      
   2. What coordinate system is used to represent geographic features?
      

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:

      UTM_Zone_Number: 16
      Transverse_Mercator:

      Scale_Factor_at_Central_Meridian: 0.9996
      Longitude_of_Central_Meridian: -87.0
      Latitude_of_Projection_Origin: 0.0
      False_Easting: 500000.0
      False_Northing: 0.0
      

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.6096
      Ordinates (y-coordinates) are specified to the nearest 0.6096
      Planar coordinates are specified in Meter
      The horizontal datum used is D_North_American_1983.
      The ellipsoid used is GRS_1980.
      The semi-major axis of the ellipsoid used is 6378137.0.
      The flattening of the ellipsoid used is 1/298.257222101.
      
7. How does the data set describe geographic features?

   Grand_Bay_Water_Level_Data_2021_2023.zip

   Water level logger data from August 2021 to February 2023 from net sedimentation tile sites located in the Grand Bay National Estuarine Research Reserve, Mississippi. Data files are named using abbreviated FAN (e.g., 23CCT01_water_level.csv). These files include both uncorrected and corrected water level data. (Source: USGS)

   datetime

   Date in the M/D/YYYY, MM/D/YYYY, M/DD/YYYY, or MM/DD/YYYY format and Coordinated Universal Time (UTC) in the H:MM or HH:MM format. Data were collected in 30-minute intervals. (Source: USGS) Date and time the water level was collected.

   baro.#

   Barometric pressure, in millibar (mbar), collected by the BaroTROLL for each of the five sites. Field names are in the "baro.#" format with # denoting which site the data are from (5, 6, 7, 8, or 9). (Source: USGS) Barometric pressure, in millibar (mbar), collected by the BaroTROLL for each of the trips and sites.

   temp.#

   Temperature collected by the water level logger for each of the five sites. Field names are in the "temp.#" format with # denoting which site the data are from (5, 6, 7, 8, or 9). (Source: USGS) Temperature collected by the water level logger, in Celsius (C), for each of the trips and sites.

   wl.#

   Uncorrected water level data collected by the Rugged TROLL 100 water level logger for each of the five sites. Field names are in the "wl.#" format with # denoting which site the data are from (5, 6, 7, 8, or 9). (Source: USGS) Uncorrected water level values collected by the Rugged TROLL 100 water level logger in meters (m) for each of the trips and sites.

   wl#_RTKcorr

   RTK corrected water level data collected by the Rugged TROLL 100 water level logger for each of the five sites. Field names are in the "wl#" format with # denoting which site the data are from (5, 6, 7, 8, or 9). (Source: USGS) Corrected water level data, in meters (m)

   wl#_navd88

   Corrected water level data (based on sensor depth and elevations converted to NAVD88) for each of the five sites using NOAA data. Field names are in the "wl#_navd88" format with # denoting which site the data are from (5, 6, 7, 8, or 9). (Source: USGS) Corrected water level data, in meters (m)

   RuggedTroll_sensor_info.csv

   Contains a comma separated value file (.csv) with information about Rugged TROLL 100 water level logger sensors deployed at net sedimentation tile sites located in the Grand Bay National Estuarine Research Reserve, Mississippi. NA values represent no data. (Source: USGS)

   Deployment FAN

   USGS field activity number (FAN) assigned to the deployment trip. (Source: USGS) Character string. Each field visit was assigned a FAN by the USGS SPCMSC to assist with dataset tracking. The FAN consists of YYYY-XXX-FA, with YYYY being the 4-digit year, XXX being the trip number, and FA representing that it is a field activity. There are three FANs associated with this dataset: 2021-320-FA, 2022-302-FA, and 2023-301-FA. FANs were used to describe the entire field effort of a project, so alternate FANs were used to differentiate between quarterly sampling trips.

   Retrieval FAN

   USGS field activity number (FAN) assigned to the retrieval trip. The retrieval FAN is also the identifying FAN when referring to the data. (Source: USGS) Character string. Each field visit was assigned a FAN by the USGS SPCMSC to assist with dataset tracking. The FAN consists of YYYY-XXX-FA, with YYYY being the 4-digit year, XXX being the trip number, and FA representing that it is a field activity. There are three FANs associated with this dataset: 2021-320-FA, 2022-302-FA, and 2023-301-FA. FANs were used to describe the entire field effort of a project, so alternate FANs were used to differentiate between quarterly sampling trips.

   Deployment Alt-FAN

   Alternate (abbreviated) FAN assigned each deployment trip. Several alternate FANs can fall under one overarching FAN. (Source: USGS) Character string. Alternate FANs were assigned by the USGS and are YYCCTXX, where YY is the 2-digit year, CCT stands for coastal change and transport (a USGS project identifier), and XX is the trip number. For example, 21CCT01 was from 2021 sample collection trip 01.

   Retrieval Alt-FAN

   Alternate (abbreviated) FAN assigned each retrieval trip. The retrieval FAN is also the identifying FAN when referring to the data. Several alternate FANs can fall under one overarching FAN. (Source: USGS) Character string. Alternate FANs were assigned by the USGS and are YYCCTXX, where YY is the 2-digit year, CCT stands for coastal change and transport (a USGS project identifier), and XX is the trip number. For example, 21CCT03 was from 2021 sample collection trip 02.

   Site

   Net sedimentation tile site the Rugged TROLL 100 was deployed at. All FANs consist of one sensor deployed at each site (sites 5-9), with the exception of the 21CCT03 and 23CCT01 trips that are only sites 5-8. (Source: USGS)

   Range of values
   Minimum:	5
   Maximum:	9

   RuggedTroll S/N

   Character string containing the serial number of the Rugged TROLL 100 sensor. (Source: USGS) Character string. Six-digit serial number of the Rugged TROLL 100 sensor.

   Deployment Latitude (NAD83)

   Latitude of the sensor platform in the North American Datum of 1983 (NAD83). Values are presented in decimal degrees. (Source: USGS)

   Range of values
   Minimum:	-88.44931854
   Maximum:	-88.4463748

   Deployment Longitude (NAD83)

   Longitude of the sensor platform in the North American Datum of 1983 (NAD83). Values are presented in decimal degrees. (Source: USGS)

   Range of values
   Minimum:	30.33659459
   Maximum:	30.35267639

   Notes

   Additional notes about the information presented in the table. (Source: USGS) Character string additional notes about the information presented in the table.

Who produced the data set?

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • Joseph F. Terrano
   • Kathryn E.L. Smith
   • Alisha M. Ellis
   • Jonathan Pitchford
   • Michael Archer
2. Who also contributed to the data set?
   The authors would like to acknowledge the GNDNERR staff for their contributions in collecting and reviewing this data.
3. To whom should users address questions about the data?
   U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center

   Attn: Joseph F. Terrano

   Physical Scientist

   600 4th Street South

   St. Petersburg, FL
   

   US

   (727) 502-8047 (voice)

   jterrano@usgs.gov

Why was the data set created?

How was the data set created?

1. From what previous works were the data drawn?

   NOAA tide gauges (source 1 of 1)

   National Oceanic and Atmospheric Administration, 2023, NOAA Tides and Currents: NOAA Tides and Currents, Online.

   Online Links:

   • https://tidesandcurrents.noaa.gov/noaatidepredictions.html?id=8739803
   • https://tidesandcurrents.noaa.gov/noaatidepredictions.html?id=8740166

   Type_of_Source_Media: Multimedia presentation
   Source_Contribution:

   Water level data from NOAA tide gauges were downloaded and compared with the Rugged TROLL depth measurements to generate NAVD88-corrected depths.

2. How were the data generated, processed, and modified?

   Date: 2021 (process 1 of 3)

   In August 2021, four In-Situ Rugged TROLL 100 data loggers were used to record water levels and temperature at Sites 5 through 8 and one In-Situ Rugged BaroTROLL was used to record barometric pressure and air temperature nearby at the Grand Bay National Estuarine Research Reserve (GNDNERR) office. Starting in October 2021, Site 9 was established and a fifth well was installed. A 1.5-m long well (plastic wells wrapped in sand and a fine metal screen) was installed at each of the five study sites so approximately 0.5 m of the well was protruding from the estuary surface. Each well was installed in the estuary within 5 meters of the marsh shoreline. Before deployment, each sensor was programmed using the Win-Situ 5 software to record at a continuous 30-minute interval over the course of the 3-month deployment. At the start of each trip, the loggers were wrapped in a protective coating (plastic wrap, nylon stockings, and tape) and tied onto the well cap. Biofouling protections (plastic wrap, nylon stocking, and tape) were determined to have no impact on measurement accuracy after consultation with the manufacturer. Measurements of the string and logger length were collected for later post-processing of the data. The logger was slowly lowered into the well and the well cap was secured. The BaroTROLL was zip tied vertically to fence at the GNDNERR office roughly 3 feet off the ground. GPS position and elevation data were collected (using a real time kinematic global positioning system) on the top of the well cap and at the marsh surface next to the well. See the "GB_Elevation_Data_2020_2023.zip" folder of this data release for exact location and elevation information. Person who carried out this activity:
   

   U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center

   Attn: Joseph F. Terrano

   Physical Scientist

   600 4th Street South

   St. Petersburg, FL
   

   U.S.

   (727) 502-8047 (voice)

   jterrano@usgs.gov

   Date: 2023 (process 2 of 3)

   The Rugged TROLL 100s at the sites were collected and redeployed quarterly: 2021-320-FA (21CCT03, August 2021-September 2021; 21CCT05, October 2021-December 2021), 2022-302-FA (22CCT01, December 2022-February 2022; 22CCT03, February 2022-May 2022; 22CCT05, May 2022-August 2022; 22CCT07, August 2022-November 2022) and 2023-301-FA (23CCT01, November 2023-February 2023). During 21CCT03 and 23CCT01, the loggers were only deployed at sites 5 through 8. Each collection consisted of gently removing the logger from the well and noting if there was sediment in the well. If there was sediment in the well, it was cleaned and moved to a new location, a new water level logger was then placed inside the well. Measurements at the new location were collected for the string and logger as well as GPS coordinates and elevation. Since the sediment filled the well, a new logger could not be deployed deep enough to be submerged. As a result, the well had to be removed, cleaned (or swapped with a new well), and moved to a new location. The BaroTROLL was collected every 3 or 6 months depending on the current array of sensors deployed and was always placed back on the GNDNERR fence at the same place and height. The different collection period for the BaroTROLL was acceptable because the post-processing software clipped the data to the necessary dates. Person who carried out this activity:
   

   U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center

   Attn: Joseph F. Terrano

   Physical Scientist

   600 4th Street South

   St. Petersburg, FL
   

   U.S.

   (727) 502-8047 (voice)

   jterrano@usgs.gov

   Date: 2023 (process 3 of 3)

   Following each trip, the Rugged TROLL 100 data were downloaded as raw uncorrected data. Water level data was barometrically corrected using data from the BaroTROLL and the Win-Situ 5 software. Due to the soft sediment and dynamic nature of the estuary surface, the field-based RTK-GPS elevations may be slightly deeper than the actual elevation as a result of the survey rod sinking into the surface. For additional information on positional and elevation values and uncertainty see the GB_Elevation_Data_2020_2023.zip folder of this data release. As a second method to verify the water level data, the water level was corrected to the North American Vertical Datum of 1988 (NAVD88) by comparing the logger water level measurements to National Oceanic and Atmospheric Administration (NOAA) water level gauge data from Bayou La Batre Bridge, Alabama (Station ID: 8739803) using R. Water level data for the same time period were downloaded from NOAA and plotted against temporally coincident logger water level data. The slope of the ordinary least squares regression line provided an elevation correction which was then applied to the water level data to adjust it to NAVD88 (Smith and others, 2020). In this region, 0 m NAVD88 is approximately 0.053 m mean sea level (MSL) based on the Grand Bay NERR, Mississippi Sound, MS Tidal Datums (NOAA Station ID: 8740166). Elevation correction values include: 21CCT03 (Site 5 (-0.6527 m), Site 6 (-0.82265 m), Site 7 (-0.73755 m), and Site 8 (-0.88566 m)), 21CCT05 (Site 5 (-0.61746 m), Site 6 (-0.80595 m), Site 7 (-0.72618 m), Site 8 (-0.8998 m), and Site 9 (-0.46844 m)), 22CCT01 (Site 5 (-0.41618 m), Site 6 (-0.86747 m), Site 7 (-0.65315 m), Site 8 (-0.45109 m), and Site 9 (-0.54331 m)), 22CCT03 (Site 5 (-0.57534 m), Site 6 (-0.87396 m), Site 7 (-0.79467 m), Site 8 (-0.314 m), and Site 9 (-0.74173 m)), 22CCT05 (Site 5 (-0.37759 m), Site 6 (-0.84478 m), Site 7 (-0.59982 m), Site 8 (-0.71295 m), and Site 9 (-0.46307 m)), 22CCT07 (Site 5 (-0.39514 m), Site 6 (-0.84478 m), Site 7 (-0.71148 m), Site 8 (-0.81791 m), and Site 9 (-0.64155 m)), 23CCT01 (Site 5 (-0.4754 m), Site 6 (-0.78589 m), Site 7 (-0.61198 m), Site 8 (-0.72278 m). The final data output format was a CSV file per alt-FAN. For additional information about data corrections, processing, and detrending, please contact the metadata contact listed in this record. Person who carried out this activity:
   

   U.S. Geological Survey - St. Petersburg Coastal and Marine Science Center

   Attn: Joseph F. Terrano

   Physical Scientist

   600 4th Street South

   St. Petersburg, FL
   

   U.S.

   (727) 502-8047 (voice)

   jterrano@usgs.gov

   Data sources used in this process:

   • NOAA water level gauge data

   Data sources produced in this process:

   • 21CCT03_water_level.csv
   • 21CCT05_water_level.csv
   • 22CCT01_water_level.csv
   • 22CCT03_water_level.csv
   • 22CCT05_water_level.csv
   • 22CCT07_water_level.csv
   • 23CCT01_water_level.csv
   • RuggedTroll_sensor_info.csv

3. What similar or related data should the user be aware of?
   National Oceanic and Atmospheric Administration (NOAA), 2023, NOAA Tides and Currents: NOAA Center for Operational Oceanographic Products and Services, Silver Spring, MD.

   Online Links:

   • https://tidesandcurrents.noaa.gov/

   Other_Citation_Details: Provides coastal tidal and current data
   

   Smith, Kathryn E.L., Terrano, Joseph F., Khan, Nicole S., and Stalk, Chelsea A., 20200226, Shore Proximal Sediment Deposition, Elevation, Turbidity, and Water Level Data for five Sites in the Coastal Marsh at Grand Bay National Estuarine Research Reserve, Mississippi, From October 2016 Through October 2017: United States Geological Survey, St. Petersburg, Florida.

   Online Links:

   • https://doi.org/10.5066/P9BFR2US

   Other_Citation_Details: Smith and others (2020a)
   

   Smith, Kathryn E.L., Terrano, Joseph F., Pitchford, Jonathan, Brochard, Michael, Vargas, Joseph M., Atchia, Isabelle D., Everhart, Cheyenne S., and Smith, Christopher G., 20200713, Shore Proximal Marsh Sediment Deposition and Ancillary Data From Grand Bay National Estuarine Research Reserve, Mississippi, From July 2018 to January 2020: United States Geological Survey-St. Petersburg Coastal and Marine Science Center, St. Petersburg, Florida.

   Online Links:

   • https://doi.org/10.5066/P9ONI8PS

   Other_Citation_Details: Smith and others (2020b)
   

   Smith, Kathryn E.L., Pitchford, Jonathan L., Sparks, Eric L., Archer, Michael J., Virden, Matthew F., Terrano, Joseph F., and Smith, Christopher G., 20250612, Evaluating the influence of constructed subtidal reefs on marsh shoreline erosion, sediment deposition, and wave energy: Estuaries and Coasts Volume 48, Article 128, Springer Nature, Online.

   Online Links:

   • https://doi.org/10.1007/s12237-025-01564-7

   Other_Citation_Details: Smith and others (2025)
   

How reliable are the data; what problems remain in the data set?

1. How well have the observations been checked?
   The water level reported in the CSV files were collected and analyzed by the USGS-SPCMSC. Water level data in this data release may not match other published water level data due to differences with sensor placement, type, or other factors (sediment build-up in the well). Sensors were used with the factory calibration and were not manually calibrated by users. Throughout the year we routinely did sensor intercomparisons in a bucket of fresh water to ensure sensors were reading consistent measurements. Following each sensor retrieval, the data from all sites were compared to each other as well as near by tide gauges to ensure the data was reasonable. NOAA data was downloaded from the NOAA Tides and Currents website as processed water levels. To ensure consistency with previous USGS releases (Smith and others, 2020), uncorrected water level, RTK corrected water level, and NOAA-corrected water level were also included. Using R, the files were clipped to a date and time range closest to the deployment and retrieval date and times to preserve as much of the data as possible. As a result, the start and end of each file (data from the first or last 1-2 hours in each file) may contain data from when the sensor was acclimating to the water conditions. The erroneous data are often represented as null values (represented as "NA"). There were additional times when the senor failed to record due to a malfunction and are dispersed throughout the data as a singular events. These events are also often represented as Null values (represented as "NA"). For additional information on positional and elevation values and uncertainty see the GB_Elevation_Data_2020_2023.zip folder of this data release. For more information, please contact the authors or USGS SPCMSC data management contact listed in this metadata record.
2. How accurate are the geographic locations?
   +/-8 mm + 0.5 ppm RMS
3. How accurate are the heights or depths?
   +/-15 mm + 0.5 ppm RMS
4. Where are the gaps in the data? What is missing?
   These data are the complete, uncorrected, and corrected water level data files for data collected within the Grand Bay National Estuarine Research Reserve, Mississippi. Each trip includes water level data from Sites 5-9, with the exception of 21CCT03 and 23CCT01 where data was only collected at Sites 5-8. Data after deployment (data from the first 1-2 hours in each file) may contain data while loggers were collecting values but were still acclimating to the water conditions. Data represented as null values (represented as "NA") are regarded as a sensor malfunction and no data exists for that date and time.
5. How consistent are the relationships among the observations, including topology?
   The data included in Grand_Bay_Water_Level_Data_2021_2023.zip contain water level measurements obtained during USGS Field Activity Numbers (FAN) 2021-320-FA (21CCT03, 21CCT05), 2022-302-FA (22CCT01, 22CCT03, 22CCT05, 22CCT07) and 2023-301-FA (23CCT01), from In-Situ Rugged TROLL 100 data loggers located at five net sedimentation tile (NST) sites (Sites 5-9). During the 21CCT03 and 23CCT01 trips, loggers were only deployed at four sites (5-8). One logger was deployed at each site in the estuary within 5 meters of the shoreline. See the GB_Elevation_Data_2020_2023.zip folder of this data release for exact location and elevation information. Barometric data was concurrently collected during all water level collection periods by a BaroTROLL data logger at the GNDNERR office.

How can someone get a copy of the data set?

1. Who distributes the data set? (Distributor 1 of 1)
   
   U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center

   Attn: USGS SPCMSC Data Management

   600 4th Street South

   Saint Petersburg, FL
   

   United States

   727-502-8000 (voice)

   gs-g-spcmsc_data_inquiries@usgs.gov
2. What's the catalog number I need to order this data set? 21CCT03_water_level.csv, 21CCT05_water_level.csv, 22CCT01_water_level.csv, 22CCT03_water_level.csv, 22CCT05_water_level.csv, 22CCT07_water_level.csv, 23CCT01_water_level.csv, RuggedTroll_sensor_info.csv
3. What legal disclaimers am I supposed to read?
   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. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Comma-delimited text
     Network links:	https://coastal.er.usgs.gov/data-release/doi-P13VT3ET/data/GB_Water_Level_Data_2021_2023.zip

   • Cost to order the data: None

Who wrote the metadata?

Dates:

Last modified: 18-Jun-2025

Metadata author:

U.S. Geological Survey, St. Petersburg Coastal and Marine Science Center

Attn: USGS SPCMSC Data Management

600 4th Street South

Saint Petersburg, FL

United States

727-502-8000 (voice)

gs-g-spcmsc_data_inquiries@usgs.gov

Metadata standard:

Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)