PostGIS
Mobile
QGIS
MapBender
GeoServer
GeoNode
GeoNetwork
Novella
Solutions
58 lines
1.0 KiB
Markdown
58 lines
1.0 KiB
Markdown
# Raster Comparison
|
|
|
|
Compare two raster datasets to identify differences.
|
|
|
|
## Overview
|
|
|
|
Raster comparison analyzes differences between two raster datasets, calculating change statistics and generating difference rasters.
|
|
|
|
## Inputs
|
|
|
|
- **Raster Dataset 1**: First raster dataset
|
|
- **Raster Dataset 2**: Second raster dataset
|
|
- **Comparison Method**: Difference calculation method
|
|
|
|
## Outputs
|
|
|
|
Comparison results containing:
|
|
|
|
- Difference raster
|
|
- Change statistics
|
|
- Summary report
|
|
|
|
## Comparison Methods
|
|
|
|
- **Difference**: Pixel value differences
|
|
- **Percent Change**: Percentage change
|
|
- **Ratio**: Ratio of values
|
|
|
|
## Example
|
|
|
|
```json
|
|
{
|
|
"raster_dataset_id_1": 125,
|
|
"raster_dataset_id_2": 126,
|
|
"method": "difference"
|
|
}
|
|
```
|
|
|
|
## Use Cases
|
|
|
|
- Change detection
|
|
- Time series analysis
|
|
- Quality comparison
|
|
- Validation
|
|
|
|
## Notes
|
|
|
|
- Rasters must have compatible extents
|
|
- Resampling may be required
|
|
- Results depend on comparison method
|
|
- Processing time depends on raster sizes
|
|
|
|
## Related Documentation
|
|
|
|
- [Analysis API](../api/analysis.md)
|
|
- [Raster Tools](raster.md)
|
|
|
