DEM of Butler County,OH

I am currently working on a project. The DEM I am using is of 50*50m
resolution which is not high enough. Does anyone know where I can get for free a
better (30 by 30m) DEM or other format of data from which I can generate slope
and aspect?

You might take a look at the USGS Geodata website and it's 7.5 minute DEMs -
these are roughly 30m resolution. Perhaps you can find what you are looking for
at that location:

http://edcwww.cr.usgs.gov/doc/edchome/ndcdb/7_min_dem/states/OH.html

Hope that helps.

Best regards,

Jason

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