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GNIS elevations

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pisgah

pisgah

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Hi,

 

I am working with the summit features from the USGS NGIS data and have noticed the elevations are off by up to 50-100' in some cases.  I have noticed this in the past - I am not sure how the elevation was generated for summits (possibly joined from NED) but it is not accurate enough for my purposes. Does anyone know how the elevation was calculated? Does anyone have a workflow for attaching better elevation data to the summits?

 

Thanks in advance,

 

Pete

 

 

 






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