Converting DEM cell size from degrees to meters

Question

I have a large DEM dataset of the world's landmasses. The cell size is currently 1 arc-second. I need to resample the cell size to 250 meters. I can't for the life of me find out how to do this, but I need to in order to match it up with the cell size of other rasters I am using (which will make it easier to run some custom tools on them after converting to ASCII).

Is this possible to do? I understand there will be some error involved converting from degrees to meters, especially at higher latitudes, but since I'm converting from ~30 meters to 250 meters I assume that won't be much of an issue.

DavidWampler · Answer

Thanks for the help - that got me on the right track. A second difficulty is that the projection I am using is not in the default list (MODIS Sinusoidal) - I should have mentioned that to start with. But, adding a custom geographic transformation for that did the trick. In the end, I got the cell sizes to match up perfectly!

For reference of anyone else needing to project into the MODIS sinusoidal, this page gave the required extra information:
https://code.env.duke.edu/projects/mget/wiki/SinusoidalMODIS

Although I only needed to follow a few of the steps there along with what was mentioned in this thread to get it to work.

larryzhang1 · Answer

Larry
In your graphic, what happens if you expand the tools in Raster. I.e

DataManagement->ProjectionsandTransformations->Raster->ProjectRaster

Steve

Thanks�?Steve�?

Visible now after expending.

David,

You can try this GP (or the GP 'Resample') and then compare with the above MD workflow ...

SteveLynch · Answer

However, very sadly, we users don�??t see the tool in 10.x so far (see the attachment)[/INDENT]

Larry
In your graphic, what happens if you expand the tools in Raster. I.e

DataManagement->ProjectionsandTransformations->Raster->ProjectRaster

Steve