Clip Raster resamples when it shouldn't

Question

Hi all,

At my wits end here and seeking guidance:

I am georeferencing a set of historic aerials. I use the Clip Raster geoprocessing tool to trim individual images.

I draw a polygon with four vertices to define the output extent. I save the Output Raster Dataset to a geodatabase. I check "Use Input Features for Clipping Geometry."

When the output is created, it has clearly been resampled. The cell orientation and cell size of the output raster is visibly different.

I have tried specifying the tool's Output Coordinate System to ensure it is the same as the projected coord sys of the input raster, setting the input raster as the Snap Raster, and running with and without "Maintain Clipping Extent" (as I understand it, unchecked should give the result I want - but neither one does).

I do not want the raster to be resampled. What should I be doing differently?

Also - adding to the sense that I'm losing it - I am almost certain that running the Clip Raster tool as described was producing non-resampled outputs several months ago (I am revisiting this workflow after a long break). Did something change in the tool with a recent version update? Is this a bug?

Thanks in advance for any suggestions.

JasperRomero · Answer

@DanPatterson thanks for the response - the only one of those exposed through the Geoprocessing GUI is Snap Raster, is there a way to enforce the others?

danretired · Answer

Cell Alignment (Environment setting)—ArcGIS Pro | Documentation

Cell Size (Environment setting)—ArcGIS Pro | Documentation

Snap Raster (Environment setting)—ArcGIS Pro | Documentation

in that order,  You have to ensure that the coordinate systems are identical (to avoid projection on the fly), the cell size is the same and that the cell alignment is confirmed.  If you are getting resampling then the alignment is off.