isohyetal

Theme keywords: climatologymeteorologyatmosphere, Precipitation, Isohyets, equal rainfall

Abstract: This layer represents lines of equal rainfall (isohyets) based on long-term mean annual precipitation data compiled from USGS, California Department of Water Resources,and California Division of Mines map and information sources. Source maps are based primarily on U.S. Weather Service data for approximately 800 precipitation stations. In the Los Angeles and San Francisco Bay areas the USWS data has been supplemented by county and local agency precipitation data. The data was collected over a sixty year period (1900-1960). Minimum mapping unit is 1000+ acres. The isohyetal contour intervals are variable due to the degree of variation of annual precipitation with horizontal distance.

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: Teale GIS Solution Group


Title:
isohyetal


Publication date: 19970101
Geospatial data presentation form: vector digital data


Other citation details:
http://gis.ca.gov/meta.epl?oid=286


Online linkage: http://gis.ca.gov/meta.epl?oid=286
Online linkage: http://old.casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/


Description:
Abstract:
This layer represents lines of equal rainfall (isohyets) based on long-term mean annual precipitation data compiled from USGS, California Department of Water Resources,and California Division of Mines map and information sources. Source maps are based primarily on U.S. Weather Service data for approximately 800 precipitation stations. In the Los Angeles and San Francisco Bay areas the USWS data has been supplemented by county and local agency precipitation data. The data was collected over a sixty year period (1900-1960). Minimum mapping unit is 1000+ acres. The isohyetal contour intervals are variable due to the degree of variation of annual precipitation with horizontal distance.

Purpose:
To provide information about percipitaion values to the public.

Supplemental information:
All maps used in the compilation of data were adjusted to a common scale of 1:1,000,000, resulting is some loss of precision. However, the inherent inaccuracies of an isohytal map for a mountainous region such as California are such that the resulting coverage is considered to be sufficiently precise for most uses.

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

Currentness reference:
publication date

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

Spatial domain:
Bounding coordinates:
West bounding coordinate: -122.649101
East bounding coordinate: -122.061320
North bounding coordinate: 38.864957
South bounding coordinate: 38.152626

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

Theme:
Theme keywords: Precipitation, Isohyets, equal rainfall
Theme keyword thesaurus: none

Place:
Place keywords: Napa County, Napa, California
Place keyword thesaurus: Geographic Names Information System

Access constraints: None. Data is available from County of Napa by registering at website: http://gis.napa.ca.gov/giscatalog/catalog.asp. This data is made available under the Public Domain Dedication and License version v1.0 whose full text can be found at: http://opendatacommons.org/licenses/pddl/1.0/
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: California Spatial Information Library

Contact instructions:
http://gis.ca.gov/meta.epl?oid=286

Browse graphic:
Browse graphic file name: http://casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/precipa.png

Data set credit:
California Spatial Information Library

Native data set environment:
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.3.1.1850


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Data Quality Information:


Lineage:
Source information:
Source citation:
Citation information:
Originators: California Spatial Information Library


Title:
precipitation


Online linkage: http://casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/precipa.png


Source contribution:
http://casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/precipa.png

Process step:
Process description:
Data downloaded from http://old.casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/ and clipped to county boundary.

Process date: 20060104


Source used citation abbreviation:
http://casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/precipa.png


Process step:
Process description:
Dataset copied.

Process date: 20060104


Source used citation abbreviation:


Process step:
Process description:
Dataset copied.

Process date: 20110114
Process time: 10520600


Source used citation abbreviation:
server=gisdata_test; service=sde:sqlserver:gisdata_test; database=planning; user=gis; version=sde.default


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Spatial Data Organization Information:


Direct spatial Rreference method: Vector


Point and vector object information:
ESRI terms description:
*Name: isohyetal_cnty
*ESRI feature type: Simple
*ESRI feature geometry:
*ESRI topology: FALSE
*ESRI feature count: 14
*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: 0.000250
Ordinate resolution: 0.000250
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: isohyetal_cnty


Entity type:
Entity type label: isohyetal_cnty
*Entity type type: Feature Class
*Entity type count: 14

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: Double
*Attribute width: 8
*Attribute precision: 38
*Attribute scale: 8


Attribute:
Attribute label: precip
*Attribute alias: precip


*Attribute type: Double
*Attribute width: 8
*Attribute precision: 38
*Attribute scale: 8


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: PRECIP
*Attribute alias: Shape.STArea()


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


Attribute:
Attribute label: SHAPE
*Attribute alias: Shape.STLength()
Attribute definition:
Feature geometry.
Attribute definition source:
ESRI

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


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


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Distribution Information:


Resource description: downloadable data


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.

Custom order process:
http://casil.ucdavis.edu/casil/gis.ca.gov/teale/precipa/precipa.png


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Metadata Reference Information:


Metadata date: 20090507
Metadata review date: 20060530


Metadata contact:
Contact information:
Contact organization primary:
Contact organization: County of Napa GIS
Contact position: GIO


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



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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Metadata stylesheets are provided courtesy of ESRI. Copyright (c) 2000-2002, Environmental Systems Research Institute, Inc. All rights reserved.