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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset represents the tiled grid used for processing and organizing the elevation contours covering Napa County at a 2-foot interval. Contour extents were clipped such that they extend 100-ft. beyond the county boundary.</SPAN></P><P><SPAN>Elevation data was derived from bare-earth surface digital elevation models (DEMs) created from LiDAR data flown in 2018 in response to the widespread 2017 fires in Northern California as part of ongoing nationwide 3DEP (U.S. Geological Survey 3D Elevation Program) efforts.</SPAN></P><P><SPAN>In limited areas, located along the western edge of the county boundary, supplemental DEMs were acquired from other sources to fill in gaps in the 3DEP data. Use of this supplemental data was negligible, totaling 24 acres out of 507,475 acres countywide (0.005% of total land area).</SPAN></P><P><SPAN>All DEM tiles (n=41) were merged into a single mosaic. Due to computing limitations, the mosaic was cut into three sections (north, central, and south) of roughly equal size for processing purposes. Two-foot contour lines were generated for each section, then further divided into 1-mile x 1-mile tiles, for a total or 886 tiles.</SPAN></P><P><SPAN>For metadata or details bout the contours themselves, see the GIS files themselves.</SPAN></P></DIV></DIV></DIV>
Service Item Id: dec4984aaa5744fda226bd9b1a9984a9
Copyright Text: Napa County Planning, Building, and Environmental Services Department, 2022
Spatial Reference:
102642
(2226)
LatestVCSWkid(0)
Initial Extent:
XMin: 6307145.981158588
YMin: 1797697.1929911987
XMax: 6657710.418201443
YMax: 2088097.192865888
Spatial Reference: 102642
(2226)
LatestVCSWkid(0)
Full Extent:
XMin: 6376772.591725394
YMin: 1812888.4729664773
XMax: 6545732.5917312205
YMax: 2076888.472852558
Spatial Reference: 102642
(2226)
LatestVCSWkid(0)
Units: esriFeet
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