Feature Description

Raster mosaic refers to combining two or more raster datasets into a single raster dataset using geographic coordinates as reference.

As shown in the figure above, two raster datasets are mosaicked using the same geographic coordinate system. For overlapping areas, the result takes the minimum value from all datasets.

Parameter Description

Parameter	Default	Description	Type
Raster Datasets to Mosaic		Raster datasets to be mosaicked. Note: All input rasters must share the same coordinate system and have identical number of bands.	Dataset[ ]
Background or NoData Value	-9999	Background value for image data	Double
Background Tolerance	0	Tolerance for background/no-data values	Double
Overlap Handling	First Dataset's Value	Value selection method for overlapping areas	RasterJoinType
Pixel Format of Result	Same as First Dataset	Pixel format of output raster	RasterJoinPixelFormat
Resolution	0	Cell size of output dataset. Default 0 uses the minimum resolution from input datasets.	Double
Output Datasource		Target datasource for results	Datasource
Output Dataset Name		Name for result dataset	String

Application Scenarios

E.g.: Time Cost Calculation

The raster mosaic tool can be used to obtain minimum travel time cost raster for a region. Prepare raster data containing unit-length travel times for national highways, provincial roads, regional areas, and high-speed rail.

Input Data:

Using the mosaic tool (with overlap handling set to select minimum values from all datasets), calculate the minimum values in overlapping areas. This produces the smallest cost values across all datasets, representing the target time cost.

Result Data:

Parameter configuration example: