How does the zonal statistics tool work in ArcGIS Pro?

How does the zonal statistics tool work in ArcGIS Pro?

There are two tools that calculate statistics by zones, Zonal Statistics and Zonal Statistics as Table. The Zonal Statistics tool calculates only one statistic at a time and creates a raster output. This value becomes the cell value of the raster output for the cells corresponding to that zone.

Can you do zonal analysis for overlapping polygons?

If the zone feature input 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. An alternative method is to process the zonal statistics iteratively for each of the polygon zones and collate the results.

How does the zonal statistics as table tool work?

The Zonal Statistics as Table tool calculates one or multiple statistics using predefined subsets or all statistics and creates a table output. As with Zonal Statistics, the resulting statistic is a single value for each zone. There is one record per zone in the output table and statistics values are reported in predefined fields.

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.

How are raster data statistics calculated in ArcMap?

For example, in ArcMap, when a raster dataset without statistics is first added to the data frame, default statistics are calculated from a subset of the dataset when they are needed to render the raster dataset. These statistics are temporary and are not stored with the raster dataset.

How does zonal statistics as table tool work?

The Zonal Statistics as Table tool calculates all, a subset or a single statistic that is valid for the specific input but returns the result as a table instead of an output raster.

How does a zonal analysis of a raster work?

A zonal operation is fundamentally a raster analysis performed on two rasters, in which one is the zone and other is the value. If the zones are defined by features, an internal feature to raster conversion will occur.

When to use zonal analysis in raster analysis?

If the Input Zone Raster or Features has overlapping features, the zonal analysis will be performed for each individual feature. If the Input Zone Raster or Features is a point feature, it is possible to have more than one point contained within any particular cell of the value input raster.

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 calculated in zonal statistics table?

Calculates the values of a raster within the zones of another dataset and reports the results to a table. A zone is defined as all areas in the input with the same value. The areas do not have to be contiguous. Both raster and feature can be used for the zone input.