You can use the Mosaic tool even if the raster datasets have different color maps however, you must choose the proper color map mode. When mosaicking with raster datasets containing color maps, it is important to note the differences across the color maps for each raster dataset you mosaic. Geodatabase rasters will work without this extra step. Whenever possible, use the Last option for the Mosaic Operator parameter to mosaic raster datasets to an existing raster dataset in a geodatabase it is the most effective way to mosaic.įor file-based rasters, Ignore Background Value must be set to the same value as NoData for the background value to be ignored.
The Blend and Mean options are best suited for continuous data. The Target Raster parameter value is considered the first raster in the list of input rasters.įor mosaicking of discrete data, the First, Minimum, or Maximum option in Mosaic Operator will provide the most meaningful results. For example, you can keep the color map of the most recent raster dataset used in the mosaic. There are also several options for handling a color map, if the raster dataset uses one. The overlapping areas of the mosaic can be handled in several ways for example, you can set the tool to keep only the first raster dataset's data, or you can blend the overlapping cell values. If the target raster is a CRF format raster, the extent will be updated. Some mosaic techniques can help minimize the abrupt changes along the boundaries of the overlapping rasters. Mosaic is useful when two or more adjacent raster datasets need to be merged into one entity. The target raster must be an existing raster dataset, which can be an empty raster dataset or one that contains data.
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