| snippet:
|
Napa County subbasins prepared as an update to the previous planning drainages layer using high quality elevation data. |
| summary:
|
Napa County subbasins prepared as an update to the previous planning drainages layer using high quality elevation data. |
| extent:
|
[[-122.648938024093,38.1441669609258],[-122.06118980856,38.8642806503622]] |
| accessInformation:
|
ESA, 2026; Napa County, 2026 |
| thumbnail:
|
thumbnail/thumbnail.png |
| maxScale:
|
1.7976931348623157E308 |
| typeKeywords:
|
["ArcGIS","ArcGIS Server","Data","Feature Access","Feature Service","providerSDS","Service"] |
| description:
|
The subbasin delineations were based off Napa County"s prior planning subbasins (https://www.napacounty.gov/DocumentCenter/View/2635/Napa-County-Watershed-Map-PDF?bidId=).This layer was made by Environmental Science Associates (ESA) as part of Napa County"s 2025 Baseline Data Report.High quality Digital Elevation Model's (DEM) were combined to fully delineate subbasins. The Napa County Streams layer was used to burn streams into the DEM to ensure that subbasin delineations were consistent with the County"s streams layer.Raw catchments generated with the ArcGIS Pro hydrology toolset were subsequently merged together as necessary to adhere to original planning drainages. In cases where planning drainages were subdivided in greater detail then was delineated in the raw catchment layer, ESA defined pour points to manually delineate planning drainages using the "Subwatershed Delineation" geoprocessing tool. ESA worked with the County to identify areas requiring additional refinement, and further refined delineation based on a review of the delineation against satellite imagery, Google Earth Street View, and the DEM"s contour/ hillshade. |
| licenseInfo:
|
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, Napa County 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. Napa County 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 |
| catalogPath:
|
|
| title:
|
Drainages |
| type:
|
Feature Service |
| url:
|
|
| tags:
|
["boundaries","environment","planningCadastre","Napa County BDR","Baseline data","watersheds","hydrology"] |
| culture:
|
en-US |
| portalUrl:
|
|
| name:
|
Drainages |
| guid:
|
58D97FF9-A59E-442B-B57F-843C192AE557 |
| minScale:
|
0 |
| spatialReference:
|
NAD_1983_StatePlane_California_II_FIPS_0402_Feet |