| snippet:
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To serve as a spatial feature showing the assessor parcel number, acres, landuse code and tax id code of parcels in Napa County including ownership.
Parcels delineate the approximate boundaries of property ownership as described in Napa County deeds, filed maps, and other source documents. Parcel boundaries in GIS are created and maintained by the Assessor’s Division Mapping section and Information Technology Services. Each parcel has at least one Assessor’s Parcel Number that is its unique identifier. The APN or ASMT number is the link to various Napa County databases containing information such as owner name, situs address, property value, and land use. |
| summary:
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To serve as a spatial feature showing the assessor parcel number, acres, landuse code and tax id code of parcels in Napa County including ownership.
Parcels delineate the approximate boundaries of property ownership as described in Napa County deeds, filed maps, and other source documents. Parcel boundaries in GIS are created and maintained by the Assessor’s Division Mapping section and Information Technology Services. Each parcel has at least one Assessor’s Parcel Number that is its unique identifier. The APN or ASMT number is the link to various Napa County databases containing information such as owner name, situs address, property value, and land use. |
| extent:
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[[-180,-69.8925925925926],[180,90]] |
| accessInformation:
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Napa County Public Works - Surveying Services, Napa County Assessor’s Mapping Section, Napa County Information Technology Services and GIS, ESRI Parcel Fabric v. 3.1.4 |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Feature Access","Feature Service","providerSDS","Service"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>Internal view of the parcel layer. This view contains all the attributes that can be seen by County employees.</SPAN></P><P><SPAN>There are approximately 51,300 real property parcels in Napa County. Parcels delineate the approximate boundaries of property ownership as described in Napa County deeds, filed maps, and other source documents. GIS parcel boundaries are maintained by the Information Technology Services GIS team. Assessor Parcel Maps are created and maintained by the Assessor Division Mapping Section. Each parcel has an Assessor Parcel Number (APN) that is its unique identifier. The APN is the link to various Napa County databases containing information such as owner name, situs address, property value, land use, zoning, flood data, and other related information. Data for this map service is sourced from the Napa County Parcels dataset which is updated nightly with any recent changes made by the mapping team. There may at times be a delay between when a document is recorded and when the new parcel boundary configuration and corresponding information is available in the online GIS parcel viewer.</SPAN></P><P><SPAN>From 1850 to early 1900s assessor staff wrote the name of the property owner and the property value on map pages. They began using larger maps, called “tank maps” because of the large steel cabinet they were kept in, organized by school district (before unification) on which names and values were written. In the 1920s, the assessor kept large books of maps by road district on which names were written. In the 1950s, most county assessors contracted with the State Board of Equalization for board staff to draw standardized 11x17 inch maps following the provisions of Assessor Handbook 215. Maps were originally drawn on linen. By the 1980’s Assessor maps were being drawn on mylar rather than linen. In the early 1990s Napa County transitioned from drawing on mylar to creating maps in AutoCAD. When GIS arrived in Napa County in the mid-1990s, the AutoCAD images were copied over into the GIS parcel layer. Sidwell, an independent consultant, was then contracted by the Assessor’s Office to convert these APN files into the current seamless ArcGIS parcel fabric for the entire County. Beginning with the 2024-2025 assessment roll, the maps are being drawn directly in the parcel fabric layer.</SPAN></P><P><SPAN>Parcels in the GIS parcel fabric are drawn according to the legal description using coordinate geometry (COGO) drawing tools and various reference data such as Public Lands Survey section boundaries and road centerlines. The legal descriptions are not defined by the GIS parcel fabric. Any changes made in the GIS parcel fabric via official records, filed maps, and other source documents are uploaded overnight. There is always at least a 6-month delay between when a document is recorded and when the new parcel configuration and corresponding information is available in the online parcel viewer for search or download.</SPAN></P><P><SPAN>Parcel boundary accuracy can vary significantly, with errors ranging from a few feet to several hundred feet. These distortions are caused by several factors such as: the map projection - the error derived when a spherical coordinate system model is projected into a planar coordinate system using the local projected coordinate system; and the ground to grid conversion - the distortion between ground survey measurements and the virtual grid measurements. The aim of the parcel fabric is to construct a visual interpretation that is adequate for basic geographic understanding. This digital data is intended for illustration and demonstration purposes only and is not considered a legal resource, nor legally authoritative.</SPAN></P></DIV></DIV></DIV> |
| licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The Napa County Parcels layer is confidential and should not be shared.</SPAN></P><P><SPAN>The geographic placement of boundaries within this map are approximate and subject to change. Parcel boundary accuracy can vary significantly, with errors ranging from a few feet to several hundred feet. Users of this map are responsible for determining its suitability for their intended use or purpose and should not consider the data contained or derived herein as legally sufficient. For help or questions regarding assessor parcels, please contact assessor@countyofnapa.org. For property survey data, please contact publicworks@countyofnapa.org. Due to scheduled GIS updates, parcels in the GIS may not reflect a recent boundary change or current assessment. </SPAN></P><P><SPAN>This digital data is intended as a visual reference only and is not considered a legal resource, or legally authoritative. Users of this data are hereby notified that the appropriate public preliminary 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 of data furnished hereunder. Because the GIS data is not warranted to be up-to-date, the user should contact the appropriate County department for the most current information. </SPAN></P><P><SPAN>The Privacy Act of 1974 (5 U.S.C. § 552a) and California Government Code Section 7928.15 protects citizens from disclosure of personal information, which includes certain parcel attribute information, such as, but not limited to, parcel owner names. Sensitive parcel attribute information for individual owners cannot be disclosed on maps, in reports, or other written or graphic public products derived from the data.</SPAN></P><P><SPAN>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 contact the appropriate County department for updated information. To assist the Napa County GIS team in the maintenance of the data, users are requested to provide information concerning any errors or discrepancies found when using the data to the following address: </SPAN></P><P><SPAN>GIS Staff Napa County, gisstaff@countyofnapa.org</SPAN></P></DIV></DIV></DIV> |
| catalogPath:
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| title:
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Napa County Parcels |
| type:
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Feature Service |
| url:
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|
| tags:
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["Napa","Napa County","parcels","cadastre","Assessor"] |
| culture:
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en-US |
| name:
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Napa_County_Parcels |
| guid:
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7C4FE755-28FC-49B7-9839-75751D19CB82 |
| minScale:
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0 |
| spatialReference:
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NAD_1983_StatePlane_California_II_FIPS_0402_Feet |