Bathymetric Terrain Model of the U.S. Atlantic Margin (100-meter resolution) compiled by the U.S. Geological Survey (32-bit GeoTIFF, MERCATOR Projection, WGS 84)

Step 1. This step is the same for all surveys included in this grid except as noted for RB0904, NF-11-04-NC, MGL1512, NF1208_USGS, H12490, and H12491. Downloaded the raw data files from the National Centers for Environmental Information (NCEI) for each survey listed below. Line files are archived in the geographic coordinate system and loaded into CARIS HIPS (v. 7.1-9.0, Software was updated as new versions were available over the course of this project). All surfaces created in HIPS used a 100 meter grid cell resolution and the Mercator projection with a central longitude of 72.0 degrees West, and a latitude of true scale of 45.0 degrees North that is more suitable for the spatial extent of this project than the geographic coordinate system.

Where:
Survey=Cruise Name
Source=the address of the National Centers for Environmental Information archive location where raw data were downloaded.
Download Date=The calendar date the raw data were downloaded.
Download Format= the version of MB-System format of the data downloaded.
Output Surface= The name of the final CARIS surface (in .csar format) that was used in the combine function.
Surface Creation Date= the calendar date the latest surface was created for input to the combine function.

If any edits were made to a surface, it is rebuilt, interpolated, and a new creation data is recorded. Format = YYYYMMDD Surveys in Version 1 (ambath100) that are included in Version 2 (AMBath100m_V2.tiff). These data are included in "AtlanticMarginOFRBath100m5Feb13.csar" described in processing step 7 below.

VERSION EXPLANATION: The follwing surveys are included in Version 1 of this grid, but were superceded with newer, higher resolution dat in Version 2: B00218, B00219, B00220, B00308, B00309. The Surveys listed below were included in Version 1 and are also included in Version 2. Some of the surveys were updated for version 2 to either include additional lines from the same survey, that are now with in the larger extent covered by version 2, or further edited to improve data quality. An explantion of updated surfaces are included with each updated entry below.

Survey: B00213
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/whiting/B00213/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb15
Output Surface: B00213_100mInterp.csar
Surface Creation Date: 20120727

Survey: B00214
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/whiting/B00214/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb15
Output Surface: B00214_100mInterp.csar
Surface Creation Date: 20120720

Survey: B00215
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/whiting/B00215/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb15
Output Surface: B00215_100mInterp.csar
Surface Creation Date: 20120720

Survey: B00310
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/mt._mitchell/B00310/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb15
Output Surface: B00310_BEUTM_100m_Interp.csar
Surface Creation Date:20120720

Survey: B00221
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/mt._mitchell/B00221/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb15
Output Surface: B00221_100mInterp5x5.csar
Surface Creation Date:20120720

Survey:HEN04-1
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/henson/HEN04-1/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb51
Output Surface: Hen01Merc72_100m_Interp.csar
Surface Creation Date:20121218

Survey: HEN04-2. This surface was updated for version 2 to include portions of lines south of Buell Seamount that were downloaded in 2012, but not >>>included in version 1.0 of the data.
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/henson/HEN04-2/multibeam/data/version1/MB/
Download Date: 20120705
Download Format: mb51
Output Surface: Henson04_02_100m_Interp.csar (v. 1)
Surface Creation Date:20121220
Output Surface: Henson04_02_100mInterpV2.csar (v. 2)
Surface Creation Date: 20151026

Survey: PF0501. This survey has two seperate surveys areas (north and south). The northern section was included in version 1 and updated to include >missing portion at end of line "Atlantic_line_287_raw.all". The southern survey area (south), was not included in version 1, but is included in version 2.
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/pathfinder/PF0501/multibeam/data/version1/MB/
Download Date: 20120731
Download Format: mb15
Output Surface: PF0501_IntV2100m.csar (north)
Output Surface: PF0501S_InterpV2.csar (south)
Surface Creation Date: 20130110  (north)
Surface Creation Date: 20150211  (south)

Survey: HEN04-3
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/henson/HEN04-3/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb51
Output Surface:Hen04_3Merc72_100m_Interp.csar
Surface Creation Date:20121218

Survey: KN178
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/knorr/KN178/multibeam/data/version1/MB/
Download Date: 20061219
Download Format: mb41
Output Surface: KN178_Merc100BE.csar
Surface Creation Date: 20130108

Survey: RB0904
Source:  USGS participated on this survey and accessed raw data directly from ship.
USGS archived data with NCEI 201302 address:http://surveys.ngdc.noaa.gov/mgg/MB/ocean/ronald_h._brown/RB0904/multibeam/data/version1/MB/
Download Date: N/A did not download from NCEI
Output Surface: RB09_BEMerc100m_Interp.csar
Creation Date: 20130108

Survey: EX1106
Source:http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1106/multibeam/data/version1/MB/
Download Date: 20110920
Output Surface: EX1106_Merc100m.csar (v. 1) This surface was updated for version 2 to included lines that extend further south in the area of the Cape Fear Landslide.
Surface Creation Date:20120822
Output Surface: EX1106_V2.csar (v. 2)
Surface Creation Date: 20152312

Survey: EX1201
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1201/multibeam/data/version1/MB/
Download Date:20120501
Output Surface: EX1201_BEMerc100m.csar (v 1). This surface was updated for version 2 to included lines that extend further south in the area of the >Cape Fear Landslide .
Surface Creation Date: 20130103
Output Surface: EX1201_BlakeV2.csar (v 2)
Surface Creation Date: 20152312

Survey: EX1204
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1204/multibeam/data/version1/MB/
Download Date: 20121004
Output Surface: OE_EX1204_Merc100mBE.csar
Surface Creation Date:20121120

Survey: NF-11-04-NC
Source: USGS participated on this survey and accessed raw data directly from ship.

USGS archived data with NGDC 201302. http://surveys.ngdc.noaa.gov/mgg/MB/ocean/nancy_foster/NF-11-04-NC/multibeam/data/version1/MB/em1002/

Download Date: N/A
Output Surface: NF1104_BEMerc100m.csar
Surface Creation Date:20111126

Survey: NF1208_USGS
Source: USGS participated on this survey and accessed raw data directly from ship.
USGS archived data with NGDC 201302. http://surveys.ngdc.noaa.gov/mgg/MB/ocean/nancy_foster/NF1208_USGS/multibeam/data/version1/MB/
Download Date:N/A
Output Surface: NF1208_100mBEMerc.csar
Surface Creation Date: 20121126


NEW SURVEYS INCLUDED IN VERSION 2.0

Survey: KNOX17RR
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/roger_revelle/KNOX17RR/multibeam/data/version1/MB/
Download Date:20120831
Download Format:mb56
Output Surface: KNOX17RR_Merc100mOFRINterp2.csar
Surface Creation Date: 20151026

Survey: PF0502
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/pathfinder/PF0502/multibeam/data/version1/MB/
Download Date:20130110
Download Format: mb51
Output Surface: PF0502_V2.csar
Surface Creation Date: 20151026

Survey: RB1202
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/pathfinder/PF0502/multibeam/data/version1/MB/
Download Date:20120911
Download Format: mb58
Output Surface: RB1202_InterpV2.csar
Surface Creation Date: 20151026

Survey: EX1205L1
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1205L1/multibeam/data/version1/MB/
Download Date:20120723
Download Format: mb58
Output Surface:EX1205_L1_V2.csar
Surface Creation Date: 20150928

Survey: EX1205L2
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1205L2/multibeam/data/version1/MB/
Download Date:20120724
Download Format: mb58
Output Surface:EX1205_L2_OFR.csar
Surface Creation Date: 20150928

Survey: EX1206
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1206/multibeam/data/version1/MB/
Download Date:20130124
Download Format: mb58
Output Surface: EX1206_V2_100mInterp.csar
Surface Creation Date: 20150520

Survey: EX1301
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1301/multibeam/data/version1/MB/
Download Date:20120620
Download Format: mb58
Output Surface: EX1301_100mV2.csar
Surface Creation Date:20150504

Survey: EX1302
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1302/multibeam/data/version1/MB/em302/
Download Date:20140319
Download Format: mb58
Output Surface: EX1302_100m_V2.csar
Surface Creation Date:20150501

Survey: EX1303
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1303/multibeam/data/version1/MB/em302/
Download Date:20140328
Download Format: mb58
Output Surface: EX1303_100m_V2Interp3_5_5.csar
Surface Creation Date:20150929

Survey: EX1304Leg1
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1304Leg1/multibeam/data/version1/MB/em302/
Download Date:20140402
Download Format: mb58
Output Surface: EX1304_L1_MercV2.csar
Surface Creation Date:20150519

Survey: EX1304Leg2
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1304Leg2/multibeam/data/version1/MB/em302/
Download Date:20140409
Download Format: mb58
Output Surface: EX1304L2_100m_MercInterpV2.csar
Surface Creation Date:20151028

Survey: EX1403
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1403/multibeam/data/version1/MB/em302/
Download Date: 20150506
Download Format: mb58
Output Surface:EX1403_100m.csar
Surface Creation Date: 20150929

Survey: EX1404L1
Source: http://surveys.ngdc.noaa.gov/mgg/MB/ocean/okeanos_explorer/EX1404L1/multibeam/data/version1/MB/em302/
Download Date: 20150506
Download Format: mb58
Output Surface:EX1404_L1_100m.csar
Surface Creation Date: 20150929

Survey: MGL15-12
Source: http://www.rvdata.us/catalog/MGL1512
Download Date: 20151116
Download Format: .all
Output Surface: RBPFKN_MerComb100mV2.csar

Survey: H12490

Source: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H12001-H14000/H12490/BAG/H12490_MB_16m_MLLW_combined.bag.gz
Download Date: 20140404
Download Format: bag
Output Surface: H12490_MB_16m.bag
Surface Creation Date: 20140404 (NOAA). Note: These data were collected to NOAA hydrographic standards and publicly distributed in Bathymetric >Attributed grid (.bag) format in the Universal Transverse Mercator Zone 18, WGS 84 horizontal coordinate system. The vertical reference system uses Mean Lower Low Water (MLLW). No further processing was conducted.

Survey: H12491
Source: http://surveys.ngdc.noaa.gov/mgg/NOS/coast/H12001-H14000/H12491/BAG/H12491_MB_16m_MLLW_Combined.bag.gz
Download Date: 20140404
Download Format: bag
Output Surface: H12491_MB_16m.bag
Surface Creation Date: 20140404 (NOAA)  Note: These data were collected to NOAA hydrographic standards and publicly distributed in Bathymetric >Attributed grid (.bag) format in the Universal Transverse Mercator Zone 18, WGS 84 horizontal coordinate system. The vertical reference system uses Mean Lower Low Water (MLLW). No further processing was conducted

Step 2. Combine the surveys from Ronald H. Brown, Pathfinder, and Roger Revelle into one surface using the "Start date is least" criteria using CARIS Base Editor (v. 4.1.14).The "Start date is least" criteria puts the surface with the oldest date of data collection on the bottom and newest data on top during the combine function. The combine criteria dictates the cell value that remains when two or more cells from different surfaces overlap.

Step 3. Combine the surveys from the Henson (Hen04-02), Pathfinder (PF0501), into one surface using the "Start date is least" criteria using CARIS Base Editor (v. 4.1.14). These two surveys were updated in version 2 to included missing lines from previous version (Hen04-02:63mba04272_p_100.d03_mb121, PF0501:Atlantic_line_287_raw.all)

Step 4. Combine the Okeanos Explorer surveys into one surface using the "start date is least" criteria using CARIS Base Editor (ver. 4.0.2.) The "Start date is greatest" criteria puts the surface with the oldest date of data collection on the bottom and newest data on top during the combine function.

Step 5: Combined Okeanos surveys with Hassler data using "creation date is greatest" criteria for the combine operation using CARIS Base Editor (ver. 4.0.2) The "Creation date is greatest" criteria puts the surface with the oldest date of data creation on the bottom and newest data on top during the combine function.

Step 7. Combine 3 surfaces. This step combines the new larger surveys in version 2, with the csar surface that was published in version 1 (AtlanticMarginOFRBath100m5Feb13.csar). Used the "Creation Date is Greatest" criteria during the combine function so that the new surveys for version 2 replaced data in version 1 that overlapped.

Step 8. Combine transit lines from several surveys in the area of Cape Fear to fill in small data gaps. EX1106.csar was updated from version 1 to version 2 to include portions of transit lines.

Step 9. Combine CapeFearV2.csar with larger surface to produce final extent.

Step 10. Fill in several no data gaps by extracting data and converting to a TIN. Using CARIS Base Editor (v. 4.1.14) Use the "Extract by Digitizing" feature from the tools menu to manually digitize polygons encompassing areas of no data. Using the "Create TIN" feature from the "Tools" menu, convert extracted suface (with holes), to a TIN (without holes). Finally convert the TIN (GapFillsTIN) to a surface (GapFills100mV2.csar) using the "Interpolate surface from TIN" context menu. The Natural Neighbors mehods was used to convert the TIN to a 100-m resolution csar surface.

Step 11. Export surfaces from Base Editor as GeoTIFFs for merging in ArcMap. Using the "Export to Raster Product" from the file menu in Base Editor, export GapFills100mV2.csar and AtlanticMarginCombPF02_CFV2.csar to GeoTIFFs.

Step 12. Merge gap fill surface into main surface (AtlanticMarginV2.tiff) in ArcMap using the "Mosaic" tool in ArcMap (v. 10.3.1). During the merge process, the "first" option was used for the "Mosaic Operator" so that the Main surface was on top, and the Gap Fills only filled areas of no data in main surface.

Step 13. Fill in any remaining small holes using Raster Calculator and a 5x5 cell mean value filter ArcMap (v. 10.3.1) The original grid (AtlanticMargin_V2.tif) was converted to an 8-bit ArcRaster grid (BathMask) to use as a mask feature to constrain the mean filter. After filtering, the "shrink" tool was used to clip the filtered grid (ambathfilt5x5), back to the original boundary using "number of zones= 4" option.

Added keywords section with USGS persistent identifier as theme keyword.