Data
CHARTS Bottom Reflectance
Provided by the U.S. Army Corps of Engineers
The National Coastal Mapping program is designed to provide high-resolution elevation and imagery data along U.S. shorelines on a recurring basis. The program uses the Compact Hydrographic Airborne Rapid Total Survey (CHARTS) system that integrates topographic and bathymetric lidar sensors, a digital camera, and a hyperspectral scanner on a single remote sensing platform. CHARTS is used in coastal mapping and charting activities. One derived data set from CHARTS is bottom reflectance, which is generated from individual bathymetric waveforms that are rasterized and formed into a mosaic.
Data Specifications
- Area of Coverage: Over 6,500 kilometers (km) of shorelines on the Gulf Coast, Atlantic Coast, and in the Great Lakes, as well as connecting rivers and streams.
- Date(s) Available: Range from 2004 to present
- Format: GeoTIFF
- Resolution: Generally four-to-five-meter resolution
- Accuracy: The accuracy is within five percent of the true reflectance. The horizontal accuracy is better than +/- 0.75m. The vertical accuracy is better than +/- 0.20m.
Sample of Bottom Reflectance Imagery
