2000 Canopy Area 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

NOTE:  This table was created by selecting only 11 of the 100 possible Canopy percentage values for Baldwin County.