1990 Land Use Data

Land Use/Land Cover and Impervious Surface

About the Tables

All raster files contain attribute information describing the values associated with the data number.  There are four descriptors worth mentioning —

· Color — attribute that assigns the colors to the class

· Class_Name — name assigned to the data value by the USGS.

· Histogram — the total count of the number of occurrences of a Class_Name value within the  raster dataset.

· Acres and Hectares — Area computation based upon the histogram * area of each pixel.  Since the pixel size is 30m x 30m, the computations for Acres and Hectares are

· Acres = Histogram * 0.222395

· Hectares = Histogram * 0.09

Since the Albers Conical Equal Area is used for these data, area computations should be accurate for all areas of the State of Alabama.

Tabular information in the Raster Data