Elevation Contours of Napa County for non-watershed Area, 10 foot interval. These are the 10 ft contours produced during the 2002/2003 Orthophotography Project. The area covered by this data is referred to as the Non-watershed Area because it lies outside the Napa River Watershed.
The contours were mapped at a scale of 1"=400ft and meet National Map Accuracy standards at this scale.
The vertical datum for the contours is NAVD88.