Expand size of a raster with no data

[LaurenSchwarzenberg]

My end goal is to have two rasters with the exact same extent (post-processing software requires identical extents). One of my rasters is too small, and I need to expand its size to match the larger raster, basically adding no data around the original raster. Is this possible? There are a lot of options for clipping but I cannot find a way to expand or add no data. The small raster is originally created byinterpolating (IDW) a set of points with a polyline barrier. Any ideas?

[SteveLynch]

Lauren

If you are using ArcGIS 10 you can use CellStatistics. Input raster=small raster and in the environment set the processing extent=larger raster.

Steve

[DavidPetrey1]

Hi,

Hopefully the method below should work:

Add the smaller IDW dataset as the only input to the calculation for the Raster Calculator tool. Then click the Environments button at the bottom of the tool and go to Processing Extent in the Environment Settings window that appears. Set the Extent to the larger raster dataset. Click OK to set this and then run the Raster Calculator and the output should have null values to the extent you require.

David

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