Color-infrared composite of Landsat data for the Death Valley regional flow system, Nevada and California, 1992

This data set was created to determine phreatophyte boundaries for use in
the report, "Ground-water discharge determined from estimates of
evapotranspiration, Death Valley regional flow system, Nevada and California".

The raster-based, color-infrared composite was derived from Landsat Thematic
Mapper imagery data acquired during June 1992 for the Death Valley regional
flow system. The image is a single-channel, parallelepiped classification that
when displayed using a 256-color color table shows a simulation of a
color-infrared composite. The data set was used in determining phreatophyte
boundaries for a ground-water evapotranspiration study.

The raster-based, color-infrared composite (CIR) was derived from Landsat
Thematic Mapper (TM) imagery data acquired during June 1992 for the Death
Valley ground-water flow system, Nevada and California.

The image is a single-channel, parallelepiped classification that when
displayed using a 256-color color table shows a simulation of a color-infrared
composite (Beverley and Penton, 1989). TM channels 2, 3, and 4 are used in the
classification process. The wavelengths of these channels correspond to those
used for a CIR composite. The data range of each channel is divided into eight
divisions. The 512 possible combinations are then reduced to 256. A color table
of red, green, and blue values is created for display of the image. Sixteen
possible color values exist for each color. These values are scaled between 0
and 255. The image is reduced from more than 16 million colors to 256 colors.