How are zonal statistics calculated in ArcGIS Pro?

How are zonal statistics calculated in ArcGIS Pro?

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 is the 90th percentile calculated in ArcGIS Pro?

Percentile —The percentile of all cells in the value raster that belong to the same zone as the output cell will be calculated. The 90th percentile is calculated by default. You can specify other values (from 0 to 100) using the Percentile Values parameter.

What is the default value for zonal statistics?

The percentile to calculate. The default is 90, indicating the 90th percentile. The values can range from 0 to 100. The 0th percentile is essentially equivalent to the minimum statistic, and the 100th percentile is equivalent to maximum. A value of 50 will produce essentially the same result as the median statistic.

How is the percentile of a zone calculated?

PERCENTILE — The percentile of all cells in the value raster that belong to the same zone as the output cell will be calculated. The 90th percentile is calculated by default. You can specify other values (from 0 to 100) using the Percentile value parameter.

Why does zonal statistics as table tool fail?

The Zonal Statistics as Table tool from the Spatial Analyst toolbar creates statistical summaries for a raster within the zones of a value raster and reports the results to a table. Running the tool may fail with a generic error: “Error 999999: Error executing function.”

How to use zonal statistics as table in GeoNet?

Search on GeoNet Submit to ArcGIS Ideas. The Zonal Statistics as Table tool from the Spatial Analyst toolbar creates statistical summaries for a raster within the zones of a value raster and reports the results to a table.

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 have only one value.

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 zones defined in zonal statistics raster?

The output zonal statistics raster. The dataset that defines the zones. The zones can be defined by an integer raster or a feature layer. The field that contains the values that define each zone. It can be an integer or a string field of the zone dataset.

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.

Is the data type dependent on the zonal calculation?

The data type (integer or float) of the output is dependent on the zonal calculation being performed and the input value raster type. By default, this tool will take advantage of multicore processors.

What is the middle value in zonal statistics?

If there are n cells in the zone and n is odd, the middle (n/2) value is written to each cell in the zone. If there is an even number of cells, the (n/2) -1 value is output. The lowest value in each zone is assigned to all cells in that zone.

How does the input zone layer work in ArcGIS Pro?

The input zone layer defines the shape, values, and locations of the zones, which can be either raster or feature. During the zonal operation, feature data is first converted to a raster. In raster data, a zone is all the cells that have the same value, whether they are contiguous or not.