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Invalid output extent when using extract by mask

Question asked by shakespace on Jun 1, 2015
Latest reply on Jun 9, 2015 by shakespace

I want to extract a world map to the Great Lake region. The original data doesn't have a projection. (the original data is from They seem don't have metadata either.

So I defined a project WGS_1984_World_Mercator to it and also reprojected my mask data also to WGS_1984_World_Mercator . But the two data sets don't have overlapping areas. When I tried to extract the world map with the mask using extract by mask tool, it showed me "invalid output extent". I think it may because I defined the wrong projection. But I don't know the original projection. It may also caused by other reasons that I'm not aware of. Can anyone point a way to me? Thank you very much!!!