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Elevation and Derived Products

 namedescriptiontypemetadatadownload
BathymetryBathymetric depth contours for Narragansett Bay and Block Island sound at twenty foot intervals as depicted on NOAA nautical charts.
s44hby97.zip (1.5 MB) E00;
bathymet.zip (1.6 MB) SHP
BenchmarksMonumented vertical control benchmarks with elevation from geodetic survey control data set.
s44vbm95.zip (0.1 MB) E00;
bench95.zip (0.1 MB) SHP
Geodetic Survey PointsGeodetic survey horizontal and vertical monumented control points from the National Geodetic Reference System and RI control bases including elevation bench marks and point coordinates.
s44bgc95.zip (0.1 MB) E00;
geod95.zip (0.2 MB) SHP
Statewide Digital Terrain Model (1997)Digital Terrain Model derived from the 1997 National Grid USA/RIDOT Digital Orthophoto Project. Provided in both TIN and ESRI terrain formats.
5KDTM_TIN.zip (248 MB) E00;
5KDTM_terrain.zip (98 MB) FGDB
Statewide Digital Terrain Model- Raw Mass Point and Breakline Data (1997)Source data used to generate the Statewide Digital Terrain Model (1997) currently offered by RIGIS. This space-delimited ASCII text file contains the coordinates and elevation values of the mass points and breakline features used for this DTM.
5KDTM_ASCII.zip (72 MB) TXT
Statewide Elevation Model (1:250000)1:250,000 scale USGS Digital Elevation Model clipped to state boundary at 100 meter pixel resolution. (No metadata available at this time.)
s44dem.zip (0.3 MB) DEM
USGS Digital Line Graphs1:100,000 USGS Hypsography Dataset 10 Meter Elevation Contour Lines for Rhode Island & Nearby Massachussetts & Connecticut within the boundaries of the 1:100,000 Quadrangles for BOSTON, PROVIDENCE, BLOCK ISLAND
100k_contours.zip (18.4 MB) SHP

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