digital raster graphic (drg) for napa county, 24,000 scale

Data format: SDE Raster Dataset

File or table name: drg_cnty

Theme keywords: elevation, Quads, Topoquads, Quadrangles, Topographic Quadrangles

Abstract: Digital raster graphic (DRG) files are scanned and rectified images of USGS quadrangles. This data depicts 7.5 minute quadrangle topographic maps, which are prepared by the U.S. Geological Survey. Scale - 1:24,000

FGDC and ESRI Metadata:

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.

Identification Information:


Citation:
Citation information:
Originators: Vestra Resources Inc.


Title:
digital raster graphic (drg) for napa county, 24,000 scale
*File or table name: drg_cnty


Publication date: 20000602
*Geospatial data presentation form: SDE raster digital data


Online linkage: http://gis.napa.ca.gov/giscatalog/catalog.asp


Description:
Abstract:
Digital raster graphic (DRG) files are scanned and rectified images of USGS quadrangles.  This data depicts 7.5 minute quadrangle topographic maps, which are prepared by the U.S. Geological Survey.
Scale - 1:24,000

Purpose:
The purpose of this layer is to assist the County of Napa in the management and analysis of this area.

Supplemental information:
A DRG is useful as a source or background layer in a GIS, as a means to perform quality assurance on other digital products, and as a source for the collection and revision of Digital Line Graphs.

*Language of dataset: en


Time period of content:
Time period information:
Single date/time:
Calendar date: 19790101

Currentness reference:
Base information is as current as the publication of its source USGS quadrangle maps which vary in publication date from 1979 to 1990.

Status:
Progress: Complete
Maintenance and update frequency: None planned

Spatial domain:
Bounding coordinates:
*West bounding coordinate: -122.755061
*East bounding coordinate: -122.001063
*North bounding coordinate: 38.877569
*South bounding coordinate: 38.122553

Local bounding coordinates:
*Left bounding coordinate: 6346715.939140
*Right bounding coordinate: 6561360.939140
*Top bounding coordinate: 2081414.859913
*Bottom bounding coordinate: 1807334.859913

Keywords:
Theme:
Theme keywords: elevation
Theme keyword thesaurus: ISO 19115 Topic Category

Theme:
Theme keywords: Quads, Topoquads, Quadrangles, Topographic Quadrangles
Theme keyword thesaurus: none

Place:
Place keywords: Napa, Napa County, California
Place keyword thesaurus: none

Access constraints: Access to this data is limited to County of Napa and partner agencies only.
Use constraints:
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.

Point of contact:
Contact information:
Contact organization primary:
Contact organization: County of Napa ITS Department
Contact position: GIS Coordinator


Contact address:
Address type: mailing and physical address
Address:
650 Imperial Way, Suite 201
City: Napa
State or province: CA
Postal code: 94559
Country: USA

Contact voice telephone: (707) 259-8141
Contact facsimile telephone: (707) 253-4824


Contact electronic mail address: gisstaff@co.napa.ca.us


Hours of service: M-F 8:00 am - 5:00 pm



*Native dataset format: SDE Raster Dataset
*Native data set environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.2.2.1350


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Data Quality Information:


Logical consistency report:
Not applicable

Completeness report:
The DRG is a faithfully reproduced digital image of the original source map. Some differences may be detected between the source graphic used and the DRG due to the RGB values assigned that particular color. The intent is to recreate those colors as near as possible. Data completeness for DRG files reflect content of the source graphic. Features may have been eliminated or generalized on the source graphic due to scale and legibility constraints. For information on collection and inclusion criteria, see U.S. Geological Survey, 1994, Standards for 1:24,000-Scale Digital Line Graphs and Quadrangle Maps.

Lineage:
Source information:
Source citation:
Citation information:
Originators: U.S. Geological Survey (USGS)


Title:
usgs ortho quads


Publication date: 19790101


Source scale denominator: 24,000
Type of source media: paper
Source citation abbreviation:
USGS
Source contribution:
USGS topographic map including the collar information.

Process step:
Process description:
Data loaded to ArcSDE.

Process date: 20020403


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Spatial Data Organization Information:


*Direct spatial Rreference method: Raster


Raster object information:
*Image format: SDR
*Number of bands: 1


*Row count: 54816
*Column count: 42929
*Vertical count: 1


*Cell size X direction: 5.000000
*Cell size Y direction: 5.000000


*Bits per pixel: 8
*Pyramid layers: TRUE
*Image colormap: TRUE
*Compression type: NONE


*Raster object type: Pixel
*Raster display type: pixel codes
*Raster origin: Upper Left


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Spatial Reference Information:


Horizontal coordinate system definition:
Coordinate system name:
*Projected coordinate system name: NAD_1983_StatePlane_California_II_FIPS_0402_Feet
*Geographic coordinate system name: GCS_North_American_1983

Planar:
Planar coordinate information:
*Planar coordinate encoding method: row and column
Coordinate representation:
*Abscissa resolution: 5.000000
*Ordinate resolution: 5.000000
*Planar distance units: survey feet

Geodetic model:
*Horizontal datum name: North American Datum of 1983
*Ellipsoid name: Geodetic Reference System 80
*Semi-major axis: 6378137.000000
*Denominator of flattening ratio: 298.257222

Vertical coordinate system definition:
Altitude system definition:
*Altitude resolution: 1.000000
*Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

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Entity and Attribute Information:


Detailed description:
Entity type:
Entity type label: drg_cnty
Entity type definition:
Digital Raster Graphic (DRG) derived from Ortho Quads
Entity type definition source:
Dataset developer

Overview description:
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Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact organization: County of Napa ITS Department
Contact position: GIS Coordinator


Contact address:
Address type: mailing and physical address
Address:
650 Imperial Way #201
City: Napa
State or province: CA
Postal code: 94559
Country: USA

Contact voice telephone: (707) 259-8141
Contact facsimile telephone: (707) 253-4824


Contact electronic mail address: gisstaff@co.napa.ca.us


Hours of service: M-F 8:00 am - 5:00 pm



Distribution liability:
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.

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Metadata Reference Information:


*Metadata date: 20080602


*Language of metadata: en


Metadata contact:
Contact information:
Contact organization primary:
Contact organization: County of Napa ITS Department
Contact position: GIS Coordinator


Contact address:
Address type: REQUIRED: The mailing and/or physical address for the organization or individual.
City: REQUIRED: The city of the address.
State or province: REQUIRED: The state or province of the address.
Postal code: REQUIRED: The ZIP or other postal code of the address.

Contact voice telephone: (707) 259-8141
Contact facsimile telephone: (707) 253-4824


Contact electronic mail address: gisstaff@co.napa.ca.us


Hours of service: M-F 8:00 am - 5:00 pm



*Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata
*Metadata standard version: FGDC-STD-001-1998
*Metadata time convention: local time


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