Bathymetric Coverage Report - U.S. Waters
This application displays the coverage and source of bathymetric datasets included in NOAA's biannual Bathy Gap Analysis, a sounding density analysis of publicly accessible bathymetry.
There are 3 steps to interrogate the analysis:
1.) Add AOI/Transit - Upload a .gpx or zipped polygon/polyline shapefile, or sketch your area of interest (AOI) or transit route.
2.) Summarize AOI - Select which layer to submit for analysis. If submitting a polyline layer, a variable width depth-based (GEBCO_2023 Grid) buffer will be applied to represent potential swath coverage.
3.) Coverage Results - Review and export the results of your submission as a PDF report or zipped GeoTiffs .
The Coverage Results window displays the contribution of each bathymetric data source and density within the AOI, as a percentage and total area in square nautical miles rounded to the nearest 100 for large AOIs. Within this window, you can print a report of the results and download the Bathy Gap Analysis grids clipped to your AOI as a set of GeoTIFF files. To view the GeoTIFFs in a GIS, you may need to change the default symbology from "Colormap" to "Unique Values".
The presence of each bathymetry layer is set according to supersession rules of the Bathy Gap Analysis, e.g., regardless of the data density, crowdsourced bathymetry (CSB) data are superseded by single-beam or multibeam data, when the data are co-located in the same 100m cell. Bathymetric data sources with potentially sparse measurements are further differentiated by the number of soundings within a 100m cell: (1-2) denotes a cell supported by 1 or 2 soundings and (3+) denotes a cell supported by 3 or more soundings. To see the full inventory of publicly accessible bathymetry and search specific surveys, visit the Bathymetric Data Viewer.
Contact us: iwgocm.staff@noaa.gov
Last updated: 07/19/2023
Version: 1.0.1
There are 3 steps to interrogate the analysis:
1.) Add AOI/Transit - Upload a .gpx or zipped polygon/polyline shapefile, or sketch your area of interest (AOI) or transit route.
2.) Summarize AOI - Select which layer to submit for analysis. If submitting a polyline layer, a variable width depth-based (GEBCO_2023 Grid) buffer will be applied to represent potential swath coverage.
3.) Coverage Results - Review and export the results of your submission as a PDF report or zipped GeoTiffs .
The Coverage Results window displays the contribution of each bathymetric data source and density within the AOI, as a percentage and total area in square nautical miles rounded to the nearest 100 for large AOIs. Within this window, you can print a report of the results and download the Bathy Gap Analysis grids clipped to your AOI as a set of GeoTIFF files. To view the GeoTIFFs in a GIS, you may need to change the default symbology from "Colormap" to "Unique Values".
The presence of each bathymetry layer is set according to supersession rules of the Bathy Gap Analysis, e.g., regardless of the data density, crowdsourced bathymetry (CSB) data are superseded by single-beam or multibeam data, when the data are co-located in the same 100m cell. Bathymetric data sources with potentially sparse measurements are further differentiated by the number of soundings within a 100m cell: (1-2) denotes a cell supported by 1 or 2 soundings and (3+) denotes a cell supported by 3 or more soundings. To see the full inventory of publicly accessible bathymetry and search specific surveys, visit the Bathymetric Data Viewer.
Contact us: iwgocm.staff@noaa.gov
Last updated: 07/19/2023
Version: 1.0.1
Choose a .gpx or zipped shapefile of your AOI or transit route and Upload to map.
Draw a polygon or polyline feature using the 2 leftmost buttons below. Click once to place a vertex, double-click to complete your sketch.
Undo or Redo feature edits using the 2 buttons on the right.
Select your AOI or Transit layer from the dropdown and then Summarize to clip the Bathy Gap Analysis and compute results.
Download zipped GeoTIFFs or Print a formatted report of your results using the buttons above.
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| Data Category | Sq. Nautical Miles |
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