Baseline Coastal Survey & Classification Product Derived From CASI Data

Alabama Coastline Hyperspectral Survey & Land Cover Classification

6900 line kms of hyperspectral CASI (Compact Airborne Spectrographic Imager) data were collected for the U.S. Army Corps of Engineers (USACE), Mobile District to establish a comprehensive GIS for the Mobile River Basin. The study area includes the Alabama Gulf Coast and barrier islands, wetlands surrounding Mobile Bay, and river floodplain. The project was managed by 3001, Inc.

Project Statistics at a Glance Number of flight blocks/lines: 19/441 Number of line km/miles: 6900/4287 Total CASI image mosaics/area: 188/2200 km2 % Mosaics analyzed/area: 49%/1071 km2

CASI Project Features

  • 16-bit CASI imagery (VNIR, ~400-1000nm)
  • 1m resolution, 36-band sensor configuration
  • Radiometrically calibrated imagery, atmospherically corrected to reflectance units;
  • Geometric calibration performed using photogrammetric bundle adjustment procedure (correcting for sensor alignment offsets)
  • Automated geocorrection mosaicking and orthocorrection using
    Lidar DEM

Project Goals and Map Products

  • ID of submerged and floating aquatic vegetation
  • Mapping of major wetland plant species and determination of
    water clarity
  • Coastline delineation
  • Mapping land cover communities
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