topic Re: Cell Alignment vs Snap Raster in ArcGIS Spatial Analyst Questions

Cell Alignment vs Snap Raster

Fuentes — Mon, 08 Mar 2021 10:16:20 GMT

Hi,

In the environments, under Raster Analysis, there are two settings Cell Alignment and Snap Raster.

If I understand the help correctly, a resampling is done at Cell Alignment. With Snap Raster the output raster is only adjusted to the snap raster without resampling. Is that correct?

Thank you for the clarification

Re: Cell Alignment vs Snap Raster

DanPatterson — Mon, 08 Mar 2021 11:39:20 GMT

you saw the visuals?

How the Snap Raster environment setting works—ArcGIS Pro | Documentation

and the notes in

Cell Alignment (Environment setting)—ArcGIS Pro | Documentation

regarding whether resampling is done

If an extent is specified in the Snap Raster environment, it will override the extent specified in the Cell Alignment environment.
The Align with Input option preserves the cell alignment of the input and does not resample the data.
The Align with Processing Extent option will resample the input raster using the resampling method specified in the environment setting.

Re: Cell Alignment vs Snap Raster

Fuentes — Mon, 08 Mar 2021 14:14:19 GMT

yes, I saw it and read it. But I was not sure about it.

Especially snap raster confused me. I always thought that snap raster also does a resample, but it is described differently here (Figure c in How the Snap Raster environment setting works).

Re: Cell Alignment vs Snap Raster

DanPatterson — Mon, 08 Mar 2021 14:43:52 GMT

Looks fine to me.

If you are doubt, why not try it and compare it to what you expect. Disk space is cheap and it won't hurt the original file at all