# Zonal Statistics

Calculate statistics for raster data within polygon zones.

## Overview

Zonal statistics calculates summary statistics (mean, sum, count, etc.) for raster pixel values within polygon zones.

## Inputs

- **Raster Dataset**: Raster dataset to analyze
- **Zone Dataset**: Polygon dataset defining zones
- **Statistics**: Statistics to calculate

## Outputs

New dataset containing:

- Zone polygons
- Raster statistics for each zone
- Zone attributes

## Statistics

- **Mean**: Average pixel value
- **Sum**: Sum of pixel values
- **Count**: Number of pixels
- **Min/Max**: Minimum/maximum pixel values
- **StdDev**: Standard deviation of pixel values

## Example

```json
{
  "raster_dataset_id": 125,
  "zone_dataset_id": 123,
  "statistics": ["mean", "sum", "count"]
}
```

## Background Jobs

This analysis runs as a background job.

## Use Cases

- Land cover analysis
- Elevation statistics
- Climate data aggregation
- Raster value extraction

## Notes

- Zones must overlap raster extent
- Statistics calculated for overlapping pixels
- NoData values excluded
- Processing time depends on raster and zone sizes

## Related Documentation

- [Analysis API](../api/analysis.md)
- [Raster Tools](raster.md)