U.S. State Plane Zones (NAD 1983) represents the State Plane Coordinate System (SPCS) Zones for the 1983 North American Datum within United States.

The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The file is georeferenced to earth's surface using the State Plane projection and coordinate system. The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000.

This tiled imagery service represents a snapshot of the land surface within Napa County and is made available for public use. The tile cache scheme follows the ArcGIS Online Model and can viewed down to ~1:283 scale. Three inch coverage is limited to the City of Napa and select portions of the surrounding Napa Valley extending northwards including Lake Hennessey. A hard copy of this data is also available directly from the GIS Team. For more information, contact gisstaff@countyofnapa.org.Extent and Resolution:This imagery encompasses approximately 82 square miles of 3-inch and 842 square miles of 6-inch Orthoimagery and Oblique imagery within Napa County, California. Projection:State Plane Coordinate System1983 California Zone 2North American Datum 1983 (2011) NAVD88 US Survey Feet Capture Window: Imagery was obtained between the dates of April 30th – May 12th, 2021Bands:3 (RGB)4th band IR is available in the raw imagery mosaic.Sensor:EagleView’s patented Pentaview camera system. For details please contact EagleView.Accuracy of Orthophotography: 3-inch GSD This data set data was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for 0.50 foot (15.24 cm) RMSEx / RMSEy Horizontal Accuracy Class, which equates to +/- 1.22 feet (37.19 cm) NSSDA 95% confidence level. 6-inch GSD This data set data was produced to meet ASPRS Positional Accuracy Standards for Digital Geospatial Data (2014) for 1.00 foot (30.48 cm) RMSEx / RMSEy Horizontal Accuracy Class, which equates to +/- 2.44 feet (74.37 cm) NSSDA 95% confidence level. For questions regarding use and access, please contact gisstaff@countyofnapa.org.

This tiled imagery service represents a snapshot of the land surface within Napa County and is made available for public use. The tile cache scheme follows the ArcGIS Online Model and can viewed down to ~1:283 scale. A hard copy of this data is also available directly from the GIS Team. For more information, contact gisstaff@countyofnapa.org.Extent and Resolution:Ortho-imagery and Oblique imagery within Napa County, California. Projection:State Plane Coordinate System1983 California Zone 2North American Datum 1983 (2011) NAVD88 US Survey Feet Capture Window:Imagery was obtained between the dates of June 5 and June18th. Bands:3 (RGB)Sensor:Accuracy of Orthophotography:For questions regarding use and access, please contact gisstaff@countyofnapa.org.