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When using the Split Raster tool and selecting the Polygon Features split method to split a raster dataset in a feature class, the pixel depth and NoData value in the output raster are changed. For example, when inputting an 8 bit raster data in the Split Raster tool and using a polygon feature class containing grids to split the raster, the output raster has a pixel depth of 16 bit and the NoData value is changed to 256, 256, 256.
The image below shows the raster dataset properties before running the Split Raster tool.
The image below shows the output raster properties after running the Split Raster tool. The Pixel Depth is increased to 16 bit and the NoData Value is changed to 256, 256, 256.
This is a known issue. It occurs if the outline of the clip polygon feature intersects a single raster cell. For more information, refer to BUG-000116630.
The image below shows a grid feature (outlined in orange) overlapping a raster. The yellow square in the middle is the raster cell intersected by the grid polygon.
To solve this issue, use one of the following workarounds in ArcMap or ArcGIS Pro:
Limit the NoData value in the Split Raster tool
When running the Split Raster tool, set the NoData Value parameter to a value within the pixel depth capacity range for the raster dataset. For example, to maintain an 8 bit raster, set the value from between 0 to 255. For more information on the range of values of different pixel depths, refer to Bit depth capacity for raster dataset cells.
The output raster dataset maintains the original pixel depth, but the NoData value is populated to the value set when running the Split Raster tool. To edit or remove the NoData value, refer to Editing a raster dataset's NoData value.
Use the Clip tool to clip the raster to each polygon