California Rangeland Priority Conservation Areas [ds553]

SDE Feature Class

Open this dataset in BIOS

Tags
rangeland, California, priority areas, boundaries, location, conservation


Summary

To help stakeholder organizations identify and evaluate broad conservation priorities. This layer is not meant for property evaluation or site-specific characterization of resources value. While we sought to use the most current data, the actual ecological condition of areas identified may be quite different than characterized. It is critical to remember that this is a broad characterization of biological resources at the scale of the ~30 million acre study area and it should not be used to filter priorities among various properties at the county scale.

Description

This is the summarized output of priority rangeland conservation areas developed by the California Rangeland Conservation Coaltion. The Coalition is a partnership between ranchers, environmentalists, and land management agencies to develop approaches to protect rangeland resources in the State. The planning that resulted in these data was the result of the work of the Focus Areas committee of the coalition during much of 2006 and early 2007. The committee used spatial data and a site-selection algorithm, Marxan (v.1.8.2) to assemble scenarios to meet conservation goals. We assembled data on vegetation systems and species (both called conservation targets) characteristic and dependent on grasslands and oak woodland ecosystems. These data were either observed or modeled and were meant to represent the most accurate and comprehensive data available to represent the location and status of conservation targets. This layer was developed by simplifying and grouping output from Marxan scenarios and stakeholder input to identify areas that are important or critical for conservation goals. These tiers of importance are based on how many times Marxan selected a planning unit to meet conservation goals. It also includes selected sites that were selected based on expert input on biological value. There are certainly areas that are not well mapped in terms of their rangeland biodoversity value, and conversely there may be areas that are prioritized for this process that have been degraded. It is imperative to field-check areas before conservation activity and investment and not rely solely on broad characterizations of resource value such as this GIS layer.

Credits

Copyright 2007 California Cattlemen's Association

Use limitations

These data should be used for meso-scale evaluation of conservation priorities at scales from ca 1:250,000 to 1:1,000,000

Extent

West -122.968242 East -118.155477
North 40.792981 South 34.507893

Scale Range

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource location, boundaries


* Content type Downloadable Data


Place keywords California

Theme keywords rangeland, priority areas, conservation

Theme keywords boundaries, location

Thesaurus
Title ISO 19115 Topic Category




Citation

* Title DS0553_20090819


Presentation formats * digital map


Citation Contacts

Responsible party
Organization's name California Rangeland Conservation Coalition - The Nature Conservancy
Contact's role originator


Resource Details

Dataset languages English(UNITED STATES)


Status completed
Spatial representation type * vector


Supplemental information
See the associated report that explains the planning process, inputs and assumptions more fully, titled: Biological Prioritization of Rangelands: Approach and Methods ( http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=15044)
* Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.1.1.3143


Credits
Copyright 2007 California Cattlemen's Association
ArcGIS item properties
* Name DS0553_20090819
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Description
ground condition
Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -122.968242
* East longitude -118.155477
* North latitude 40.792981
* South latitude 34.507893
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -13688762.036900
* East longitude -13153007.588600
* South latitude 4097205.304700
* North latitude 4981854.249900
* Extent contains the resource Yes

Resource Points of Contact

Point of contact
Individual's name Dick Cameron
Organization's name The Nature Conservancy
Contact's position Senior Conservation Planner
Contact's role point of contact


Contact information
Phone
Voice 415 281-0462

Address
e-mail address dcameron@tnc.org



Resource Maintenance

Resource maintenance
Update frequency as needed


Resource Constraints

Legal constraints
Limitations of use
The Nature Conservancy is not liable for any misuse of these data. Do not re-distrubute these data to additional orgnaiztaion without consent of TNC or CRCC.
Other constraints
Please do not re-distribute this layer. Contact the person listed as the contact for this data with any questions about data sharing.
Constraints
Limitations of use
These data should be used for meso-scale evaluation of conservation priorities at scales from ca 1:250,000 to 1:1,000,000

Spatial Reference

ArcGIS coordinate system
* Type Projected
* Geographic coordinate reference GCS_WGS_1984
* Projection WGS_1984_Web_Mercator_Auxiliary_Sphere
* Coordinate reference details
Projected coordinate system
Well-known identifier 102100
X origin -20037700
Y origin -30241100
XY scale 10000
Z origin 0
Z scale 1
M origin 0
M scale 1
XY tolerance 0.001
Z tolerance 2
M tolerance 2
High precision true
Latest well-known identifier 3857
Well-known text PROJCS["WGS_1984_Web_Mercator_Auxiliary_Sphere",GEOGCS["GCS_WGS_1984",DATUM["D_WGS_1984",SPHEROID["WGS_1984",6378137.0,298.257223563]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Mercator_Auxiliary_Sphere"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",0.0],PARAMETER["Auxiliary_Sphere_Type",0.0],UNIT["Meter",1.0],AUTHORITY["EPSG",3857]]

Reference system identifier
* Value 3857
* Codespace EPSG
* Version 7.11.2


Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name DS0553_20090819
* Object type composite
* Object count 446



ArcGIS Feature Class Properties
Feature class name DS0553_20090819
* Feature type Simple
* Geometry type Polygon
* Has topology FALSE
* Feature count 446
* Spatial index TRUE
* Linear referencing FALSE



Data Quality

Scope of quality information
Resource level dataset




Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description
to be used at meso-scales for identification and evaluation of priority rangeland conservation areas- 1:100,000 - 1:1,000,000, not to be used for site-specific conservation planning or zoning decisions.




Lineage

Process step
When the process occurred 2009-08-19
Description
Processed dataset for DFG BIOS review. Converted to California Teale Albers NAD83. Misc. edits, including citation title and keywords. Removed browse graphic link as the link did not work.


Process contact
Individual's name Will Patterson
Organization's name California Department of Fish and Game
Contact's role processor


Contact information




Process step
Description
Once each planning unit was classified into one of the 3 categories, then the boundaries between planning units with the same category value were dissolved. Then individual planning units were merged with adjacent units based on the shared length to aggregate the priority areas. It was felt that individual planninig units represented an overly precise mapping of priority areas. While rare plants and other biodiversity elements may need protection at this scale, this is not the primary purpose of this planning process. After eliminating individual planning units, the boundary lines were simplified, using the "Simplify Polygon" tool in Arc 9.x




Process step
Description
Run site-selection algorithm and group summed solution results. The summed solution is how many times a planning unit (500 ha hexagon) was selected out of 10 runs. Each run is an attempt by Marxan to meet the conservation goals in the most efficient configuration possible given constraints imposed by suitability layer. Each planning unit falls into one of 3 groups. 1. Not included in priority areas. 2. Important for rangeland goals - selected 3-7 times of 10. 3. Critical for rangeland goals- selected 8-10 times. These areas were supplemented with areas identified by The Nature Conservancy in the Central Coast as having high rangeland biodiversity value. These planning units were added as critical. Additionally, areas within Tejon Ranch in Kern/L.A. counties identified by Conservation Biology Institute as conservation priorities were added as critical. These changes are tracked at the planning unit level and are not part of this simplified data set.




Geoprocessing history

Process
Process name FeatureClassToFeatureClass_2
Date 2008-09-2911:36:59
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Process
Date 2009-08-1913:05:56
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Process
Date 2009-08-1921:43:29
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Process
Date 2011-07-2109:10:38
Tool location C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Conversion Tools.tbx\FeatureClassToFeatureClass
Command issued
Include in lineage when exporting metadata No


Process
Date 2013-06-2115:39:45
Tool location c:\program files (x86)\arcgis\desktop10.1\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project
Command issued
Include in lineage when exporting metadata No


Distribution

Distributor
Contact information
Organization's name The Nature Conservancy, California Program
Contact's role distributor




Distribution format
* Name SDE Feature Class


Transfer options
Online source
Location ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/500_599/ds553.zip

Online source
Location http://bios.dfg.ca.gov/

Fields

Details for object DS0553_20090819
* Type Feature Class
* Row count 446
Definition
California Rangeland Priority Conservation Areas [ds553]


Field OBJECTID
* Alias OBJECTID
* Data type OID
* Width 4
* Precision 10
* Scale 0
* Field description
Internal feature number.
* Description source
ESRI
* Description of values
Sequential unique whole numbers that are automatically generated.




Field Priority
* Alias Priority
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Classification of level of conservation priority.
List of values
Value 0
Description No Priority


Value 1
Description Critical Areas


Value 2
Description Important Areas




Field Shape
* Alias Shape
* Data type Geometry
* Width 4
* Precision 0
* Scale 0
Field description
Feature geometry.
Description source
ESRI
Description of values
Coordinates defining the features.




Field Shape.STArea()
* Alias Shape.STArea()
* Data type Double
* Width 0
* Precision 0
* Scale 0




Field Shape.STLength()
* Alias Shape.STLength()
* Data type Double
* Width 0
* Precision 0
* Scale 0






Metadata Details

Metadata language English(UNITED STATES)
Metadata character set utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata dataset
Scope name * dataset


* Last update 2014-04-28


ArcGIS metadata properties
Metadata format ArcGIS1.0
Metadata style FGDC CSDGM Metadata


Created in ArcGIS for the item 2014-03-0616:43:14
Last modified in ArcGIS for the item 2014-04-2813:10:07


Automatic updates
Have been performed Yes
Last update 2014-04-2813:10:07


Metadata Contacts

Metadata contact
Individual's name Dick Cameron
Organization's name The Nature Conservancy
Contact's position Senior Conservation Planner
Contact's role point of contact


Contact information


Thumbnail and Enclosures

Enclosure
Enclosure type File
Description of enclosure original metadata
Original metadata document, which was translated yes
Source metadata format fgdc