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2010. Towill Inc. Elevation Contours of Napa County for non-watershed Area, 10 foot interval. These are the 10 ft contours produced during the 2002/2003 Orthophotog... Napa County (Calif.). County Of Napa.
2010. Towill, Inc.(comp.). Elevation Contours of the Napa River Watershed Area, 5 foot interval. The area covered by this data is referred to as the Watershed Area because i... Napa County (Calif.). County Of Napa.
2005. EDAW, Inc. Elevation Ranges for County by 100 ft Intervals. Napa County (Calif.). County Of Napa.
4. ridgeline
2010. EDAW, Inc. Major and Minor Ridgelines for Napa County. Napa County (Calif.). County Of Napa.
2010. Towill Inc. Spot Elevation Points of the Napa River Watershed Area, 200 foot interval. The area covered by this data is referred to as the Watershed Area beca... Napa County (Calif.). County Of Napa.