Hello Everyone,    I was wondering if anyone could tell me how sea-level is zeroed in the 2' contour layers on the Maine GIS site?  Is it from low tide, high tide, or mean tide level?  Thanks in advance, and I apologize in advance if this answer is obvious.  I didn't see it in the metadata.  
Thanks,Aaron
Aaron Gilbreath 148 East Main StYarmouth, ME 04096(207) 841-4805

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