geology

Theme keywords: Geology, Surficial, Cretaceous, Pleistocene, Mesozoic, Mesozoic, Geology, Pleistocene, Cretaceous, Surficial, geoscientificinformation

Abstract: USGS Geology map for Napa County. This dataset is a compilation of an published and unpublished USGS geology map for Napa County and surrounding areas. The published map is "Geologic Map and Map Database of Northeastern San Francisco Bay Region, California, 2002 by R.W. Graymer, D.L. Jones an E.E. Barbb. The unpublished map is from "Geologic map and map database of eastern Sonoma and western Napa Counties, California" by R.W. Graymer, D.L. Jones, and E.E. Brabb, 2004. The unpublished map is also from Graymer and should be published in 2006.

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: USGS


Title:
geology


Publication date: 2002
Geospatial data presentation form: vector digital data


Other citation details:
Note: As of October 2005 Geologic map and map database of eastern Sonoma and western Napa Counties, Counties had not been published. Geologic Map and Map Database of Northeastern San Ffrancisco Bay Region, California was published in 2002


Description:
Abstract:
USGS Geology map for Napa County. This dataset is a compilation of an published and unpublished USGS geology map for Napa County and surrounding areas. The published map is "Geologic Map and Map Database of Northeastern San Francisco Bay Region, California, 2002 by R.W. Graymer, D.L. Jones an E.E. Barbb. The unpublished map is from "Geologic map and map database of eastern Sonoma and western Napa Counties, California" by R.W. Graymer, D.L. Jones, and E.E. Brabb, 2004. The unpublished map is also from Graymer and should be published in 2006.

Purpose:
The published map is mapped at 1:100,000 scale and is derived from a variety of sources. Some of the source data was mapped at 1:62,000 scale. The map is indended to be used at a regional scale and is not appropriate for site-specific investigations.

Supplemental information:
When the western unpublished section of the map becomes available it is recommended that it replace the current data.  There were some problems encountered when combining the maps becuase of projection.  The solution was to use Arc/Info workstation to project the data instead of Desktop.  This took care of the shift that occured along the edge of the two maps.  When the western half is updated it will also be important to check some of the attributes because there was variation between the two maps.  Water was labeled as Water, H20 and H2O.
Contact USGS for original data

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

Currentness reference:
publication date

Status:
Progress: In work
Maintenance and update frequency: Unknown

Spatial domain:
Bounding coordinates:
West bounding coordinate: -122.649028
East bounding coordinate: -122.061248
North bounding coordinate: 38.864957
South bounding coordinate: 38.152626

Keywords:
Theme:
Theme keywords: Geology, Surficial, Cretaceous, Pleistocene, Mesozoic
Theme keyword thesaurus: none

Theme:
Theme keywords: Mesozoic, Geology, Pleistocene, Cretaceous, Surficial, geoscientificinformation

Access constraints: Access to this data is limited to County of Napa, partner agencies, government agencies or non-profits. Please contact County GIS staff for more information.
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: Napa County ITS
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



Data set credit:
USGS

Native data set environment:
Microsoft Windows 2000 Version 5.2 (Build 3790) Service Pack 2; ESRI ArcCatalog 9.3.1.3000


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Data Quality Information:


Lineage:
Process step:
Process description:
The two maps were merged using Arc/Info.  When the maps were projected and combined using ArcGIS Desktop there were slivers of overlap or underlap.  This most likely was due to variations in datum conversions and should be checked when the final published map for the western part of the county is brought in.

Process date: 20051117


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Spatial Data Organization Information:


Direct spatial Rreference method: Vector


Point and vector object information:
ESRI terms description:
*Name: geology
*ESRI feature type: Simple
*ESRI feature geometry:
*ESRI topology: FALSE
*ESRI feature count: 3323
*Spatial index: TRUE
*Linear referencing: FALSE


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Spatial Reference Information:


Horizontal coordinate system definition:
Planar:
Planar coordinate information:
Planar coordinate encoding method: coordinate pair
Coordinate representation:
Abscissa resolution: 0.000128
Ordinate resolution: 0.000128
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:
*Name: geology


Entity type:
Entity type label: geology
*Entity type type: Feature Class
*Entity type count: 3323

Attribute:
Attribute label: OBJECTID_1
*Attribute alias: OBJECTID_1
Attribute definition:
Internal feature number.
Attribute definition source:
ESRI

*Attribute type: OID
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Sequential unique whole numbers that are automatically generated.


Attribute:
Attribute label: OBJECTID
*Attribute alias: OBJECTID


*Attribute type: Integer
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute:
Attribute label: PTYPE
*Attribute alias: PTYPE
Attribute definition:
Geology Code - Name is Geo_Unit field
Attribute definition source:
USGS

*Attribute type: String
*Attribute width: 35
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: SOURCE_FIL
*Attribute alias: SOURCE_FIL
Attribute definition:
Source
Attribute definition source:
polygons from the published map are labeled "Final"

*Attribute type: String
*Attribute width: 50
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: SEL
*Attribute alias: SEL


*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 5
*Attribute scale: 0


Attribute:
Attribute label: SYMB
*Attribute alias: SYMB


*Attribute type: SmallInteger
*Attribute width: 2
*Attribute precision: 5
*Attribute scale: 0


Attribute:
Attribute label: Shape_Leng
*Attribute alias: Shape_Leng


*Attribute type: Double
*Attribute width: 8
*Attribute precision: 19
*Attribute scale: 11


Attribute:
Attribute label: geo_freqnc
*Attribute alias: geo_freqnc


*Attribute type: Integer
*Attribute width: 4
*Attribute precision: 10
*Attribute scale: 0


Attribute:
Attribute label: Geo_Unit
*Attribute alias: Geo_Unit


*Attribute type: String
*Attribute width: 50
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: Geo_Time
*Attribute alias: Geo_Time


*Attribute type: String
*Attribute width: 50
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: Geo_descrp
*Attribute alias: Geo_descrp


*Attribute type: String
*Attribute width: 50
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: Shape
*Attribute alias: Shape
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

*Attribute type: Geometry
*Attribute width: 4
*Attribute precision: 0
*Attribute scale: 0


Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


Attribute:
Attribute label: SHAPE_LENG
*Attribute alias: Shape.STArea()


*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: GEO_FREQNC
*Attribute alias: Shape.STLength()
Attribute definition:
Frequency of ptype

*Attribute type: Double
*Attribute width: 0
*Attribute precision: 0
*Attribute scale: 0


Attribute:
Attribute label: GEO_UNIT
Attribute definition:
Geology Unit
Attribute definition source:
USGS

Attribute:
Attribute label: GEO_TIME
Attribute definition:
Geologic Time
Attribute definition source:
USGS

Attribute:
Attribute label: GEO_DESCRP


Attribute:
Attribute label: SHAPE
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

Attribute domain values:
Unrepresentable domain:
Coordinates defining the features.


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Distribution Information:


Distributor:
Contact information:
Contact organization primary:
Contact person: Patrick Kowta
Contact organization: Napa County ITS
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 electronic mail address: gisstaff@co.napa.ca.us


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



Resource description: access to this data is limited to county of napa and partner agencies only.


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Metadata Reference Information:


Metadata date: 20111019


Metadata contact:
Contact information:
Contact organization primary:
Contact organization: Jones & Stokes
Contact position: GIS Manager


Contact address:
Address type: mailing and physical address
Address:
2600 V Street
City: Sacramento
State or province: CA
Postal code: 95818
Country: USA

Contact voice telephone: 916-737-3000.
Contact facsimile telephone: 916-737-3030


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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