Histogram

Algorithm

The Histogram operation calculates the histogram of a raster, polygon, segment or point map. Histograms list frequency information on the values, classes, or IDs in your map.

Results are shown in a histogram window as a table and as a graph.

Histograms of Value raster maps also contain summary information such as mean, standard deviation, and percentage intervals. Summary information is available in a histogram window as well as in the Properties of the histogram.

A raster histogram lists the number of pixels, the percentages and the areas per value, class or ID. If the input raster map uses a Value domain, also cumulative number of pixels and cumulative percentages are calculated.

A polygon histogram lists the number of polygons and the perimeter and area of polygons per class, ID, or value. If the input polygon map uses a Value domain, also the cumulative number of polygons, cumulative perimeters and cumulative areas are calculated.
A segment histogram lists the number of segments and their length per class, ID or value. If the input segment map uses a Value domain, also the cumulative number of segments and cumulative lengths are calculated.
A point histogram lists the number of points per class, ID or value. If the input point map uses a Value domain, also the cumulative number of points are calculated.

Raster map histograms are stored in .HIS and .HI#.

Polygon map histograms are stored in .HSA and .HA#.

Segment map histograms are stored in .HSS and .HS#.

Point map histograms are stored in .HSP and .HP#.

See also: