Histogram of a point map   

A histogram is a special object which lists frequency information on values, classes or IDs in a map. A point histogram lists the number of points per class, ID or value in a point map. If the input point map uses a value domain, also the cumulative number of points are calculated.

In a histogram window, the histogram is presented as a table and as a graph.

A point histogram is obtained by performing the Histogram operation on a point map. For point maps that use a value domain and of which no histogram is available yet, a histogram is automatically calculated just before such a value map is displayed.

With the Histogram operation, you can also calculate histograms of raster, polygon and segment maps.