| slope derived from 2002 ortho data, watershed area | |
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Data format: SDE Raster Dataset File or table name: slope_02_200 Theme keywords: elevation, imageryBaseMapsEarthCover, Digital Elevation Model |
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Abstract:
Map of Napa County Watershed area showing slope as derived from 2002 Ortho data. The area covered by this data is referred to as the Watershed Area because it encompasses the Napa River Watershed. This is roughly the western half of the county.
The DTM data was mapped at a scale of 1" = 200 ft and meets National Map Accuracy standards at this scale. The DTM is based on LIDAR data acquired in May of 2003. |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM). Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
Map of Napa County Watershed area showing slope as derived from 2002 Ortho data. The area covered by this data is referred to as the Watershed Area because it encompasses the Napa River Watershed. This is roughly the western half of the county. The DTM data was mapped at a scale of 1" = 200 ft and meets National Map Accuracy standards at this scale. The DTM is based on LIDAR data acquired in May of 2003.
THE DOWNLOAD FOR THIS LAYER IS OVER 500 MB!
ground condition
Disclaimer: This GIS data is intended to provide a visual display of data for the user's convenience. Users of this data are hereby notified that the appropriate public primary information sources should be consulted for verification of the information. Although every reasonable effort has been made to assure the accuracy of this data, the County of Napa makes no warranty, representation or guaranty as to the content, sequence, accuracy, timeliness or completeness of any of the data provided herein and explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. The County of Napa assumes no liability for any errors, omissions, or inaccuracies in the information provided regardless of how caused and assumes no liability for any decisions made or actions taken or not taken by the user of the data in reliance upon any information or data furnished hereunder. Because the GIS data provided is not warranted to be up-to-date, the user should check with the County staff for updated information.
650 Imperial Way, Suite 201
Not applicable
This layer was created from the DTM produced during the 2002/2003 Orthophotography Project. The area covered by this data is referred to as the Watershed Area. It encompasses the Napa River Watershed which is roughly the western half of the county. For data covering the other half of the County please see "Slope derived from 2002 Ortho data NON-watershed area."
Aerial photography used for the compilation of the DTM data
This layer was created by building a TIN model using the mass point and breakline shapefiles with 3D Analyst. The TIN was then exported to ESRI grid format using ArcToolBox and linear interpolation. 3D Analyst was then used to convert the elevation grid to a slope grid measured in percent. A 10 foot cell size was used for this layer.
Converted download file to a file geodatabase containing a raster instead of an .e00 export file.
650 Imperial Way #201
Disclaimer: This GIS data is intended to provide a visual display of data for the user's convenience. Users of this data are hereby notified that the appropriate public primary information sources should be consulted for verification of the information. Although every reasonable effort has been made to assure the accuracy of this data, the County of Napa makes no warranty, representation or guaranty as to the content, sequence, accuracy, timeliness or completeness of any of the data provided herein and explicitly disclaims any representations and warranties, including, without limitation, the implied warranties of merchantability and fitness for a particular purpose. The County of Napa assumes no liability for any errors, omissions, or inaccuracies in the information provided regardless of how caused and assumes no liability for any decisions made or actions taken or not taken by the user of the data in reliance upon any information or data furnished hereunder. Because the GIS data provided is not warranted to be up-to-date, the user should check with the County staff for updated information.
All available layers are located in the Data Catalog on the website http://gis.napa.ca.gov/gisdata.asp. You can download the available layers by Registering, then returning to the site to download.
650 Imperial Way #201