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The Mosaic dataset consists of many rasters with different cell sizes. Spatial Analyst, by default, uses the largest cell size when more than 1 raster is used. For example, raster1 has a cell size of 10 and raster2 has a cell size of 20. When you use the Plus tool the output will have a cell size of 20.
The Mosaic dataset consists of many rasters with different cell sizes. Spatial Analyst, by default, uses the largest cell size when more than 1 raster is used. For example, raster1 has a cell size of 10 and raster2 has a cell size of 20. When you use the Plus tool the output will have a cell size of 20.