and Alpine Research,
- Atlantic Margin
- Gulf of Mexico
- Pacific Margin
- The project
- USGS CMG
- NOAA NGDC
Marine Substrates, Northern Gulf of Mexico
A new data coverage for the Northern Gulf of Mexico has been built in a
collaboration between the Gulf States Marine Fisheries Commission
(GSMFC), INSTAAR of the University of Colorado, PIES of the University
of New Orleans, the US Geological Survey (USGS), and many donors of
data. This web page provides an index to the VirtualGlobe, GIS and
Metadata resources of that coverage.
For the most part, standard methods of dbSEABED integration were used
(INSTAAR 2007a), applied to samplings and direct observations of the
seabed materials: the sediments and the skeletonized biota. Detailed
explanation of the gridding techniques is available at INSTAAR (2007b).
However, a primary program goal was to map hard substrate occurrences
view to protection of certain fish stocks (e.g., NOAA 2007).
Geophysical datasets were therefore also brought into play, and new
methods of dealing with polygon, polyline,
grid data imports were devised. An important factor is that geophysical
sidescan, multibeam and seismic technologies view the seabed on much
larger scales than samplings.
The outputs are presented in several formats, each with documentation.
The compilation will eventually be added to the USGS project usSEABED
Public release Blue:
Not for public release yet; apply to GSMFC for research use.
Drag-extract from zip is OK. ZE: Extract zip to a folder,
then tell GIS where to locate the themes.
|Google Earth and other
at the URL]
|Geographic Information System (GIS) Grid
These grids display the
distribution of rock exposure,
gravel, sand and mud contents.
|ArcGIS 9.x project
(*.mxd, *.aux, etc.)
|ArcGIS 9.x layer files
|ArcView 3.x ASCII grids
|ArcView 3.x BINARY grids
*.apr, *adf, *.dat, *.nit,
*.001, log, info\ filesets; 3.5MB, ZE
|Geographic Information System (GIS) Point
The points show the input
data in great detail.
gsm_wwd, gsm_cmp, gsm_srt;
|Shapefiles linked in an AV
gsm_cmp, gsm_srt; 109MB, ZE
|Geographic Information System (GIS) Polygon
Polygons are coarse
approximations of the distribution of the
types, but are useful in some GIS applications.
They are the most similar data format to previous substrates
such as Sheridan and Caldwell (2002).
ArcView 3.x polygon shapefiles, graphics, and legends, some third-party
gsmfc_py_shp_Aug07.zip; 15Mb, ZD
|Geographic Information System
Combined Shapefile set for US State Outlines (USGS ) and Mexico and
Cuba Outlines (ESRI).
Third party GIS coverages.
See original sources for public supply.
These provide the
classification and coloration of the data on a map.
Legends for ArcView3,x and ArcGIS9.x . They will be extended
/ updated over time.
separate page listings (*.avl, *.lyr)
or the zipfile dbSBD_Legends_Sep07.zip,
Description of project
goals, methods, and outcomes.
Apply to GSMFC for a copy.
Specific to this project.
A collection of hints on how to make GIS and Database products.
Output data definitions
|Formal definitions document
- INSTAAR, 2007. dbSEABED:
An Information Processing System
for Marine Substrates. [URL:
- INSTAAR, 2007. Grid Interpolation of
- NOAA, 2007. FishWatch:
Red Grouper (Epinephelus morio).
- USGS, 2007. usSEABED: Coastal & Marine Geology Program.
P. and Caldwell, P., 2002,
Compilation of data sets relevant to the identification of Essential
Habitat on the Gulf of Mexico continental shelf and for the estimation
effects of shrimp trawling gear on habitat: NOAA Technical Memorandum,
NMFS-SEFSC-483, 60 p.