How are zonal statistics used in Spatial Analyst?
Available with Spatial Analyst license. Calculates statistics on values of a raster within the zones of another dataset. A zone is defined as all areas in the input that have the same value. The areas do not have to be contiguous. Both raster and feature can be used for the zone input.
How are mean and majority determined in zonal statistics?
MEAN —Calculates the average of all cells in the value raster that belong to the same zone as the output cell. MAJORITY —Determines the value that occurs most often of all cells in the value raster that belong to the same zone as the output cell.
Can a zonal analysis be performed on overlapping polygons?
If the Input raster or feature zone data ( in_zone_data in Python) has overlapping polygons, the zonal analysis will not be performed for each individual polygon. Since the feature input is converted to a raster, each location can only have one value.
Which is an example of zonal Statistics in ArcGIS?
The output zonal statistics raster. This example determines for each zone the range of cell values in the Value input raster. This example determines for each zone the range of cell values in the Value input raster. # Name: ZonalStatistics_Ex_02.py # Description: Calculates statistics on values of a raster # within the zones of another dataset.
How are the zones defined in zonal statistics?
The zones can be defined by an integer raster or a feature layer. Field that holds the values that define each zone. It can be an integer or a string field of the zone dataset. Raster that contains the values on which to calculate a statistic. Statistic type to be calculated.
How is a zone defined in a raster?
A zone is all the cells in a raster that have the same value, whether or not they are contiguous. The input zone layer defines the shape, values, and locations of the zones. An integer field in the zone input is specified to define the zones.