Manipulating raster values in ESRI GRID files with ArcPy

beachcomber_0972

Hi GISers,

I have an interpolated raster product stored in ESRI GRID format. The interpolation technique left some residual values below zero, but for the product in question (estimated abundance data) those values do not make sense. I want to convert them to zero.

There are a bit fewer than 100 rasters to process, so this needs to be done via ArcPy. I've found some hints on how to achieve this in the GUI, but haven't been able to turn up much on how to do it via scripting.

My sense is that this will be an easy layup for anyone who knows the syntax. If anyone has any thoughts, I'd be much obliged.

beachcomber_0972

Thanks for the info.

For anybody curious, the simplest solution that I came up with was to just use the spatial analyst raster iterator. This was actually trivially simple:

for a,b in Myraster:
     if Myraster[a,b]<0:
            Myraster[a,b] = 0

Myraster.save()