Vernal Pool Distribution - California's Great Valley - 2012 [ds1070]

SDE Feature Class

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Tags
Great Valley, Sacramento Valley, Vernal Pools, 2012, San Joaquin Valley, Hogwallows, California


Summary

Map showing the distribution of vernal pool habitat in the Great Valley (California) as of 2012. It also analyzes losses since 2005 and contains information on vernal pool habitat that is protected.

Description

This mapping documents the changes in extent and condition of vernal pool habitat in the Great Valley between 2005 and 2012. "Vernal pool habitat" is defined as vernal pools and the surrounding upland (typically grassland) habitat matrix. The 2005 basemap was created by using double-blind mapping protocol and included 21.4 million acres in and surrounding the Sacramento and San Joaquin valleys (Witham et al 2013). The area included in the 2012 remapping effort focused on the 807,820 acres identified in the 2005 map and areas immediately surrounding the previously mapped polygons. Special attention was paid to areas where habitat was being created through mitigation banking. The result of the 2012 remapping shows 764,868 acres of extant habitat. This is down from 2005, a net reduction of 42,952 acres. Habitat actually was eliminated from 47,306 acres, but these losses were partially off-set by 1,679 acres of mitigation banks built since 2005, and by 2,675 acres that we missed in the 2005 mapping. In the seven years since the Recovery Plan was adopted, some 6,758 acres per year on average have been lost. (Link to Report and GIS Data) - http://www.vernalpools.org/

Credits

Carol W. Witham, Robert F. Holland and John Vollmar. 2014. Changes in the Distribution of Great Valley Vernal Pool Habitats from 2005 to 2012. Sacramento, CA. Report prepared for the U.S. Fish and Wildlife Service and Bureau of Reclamation CVPIA Habitat Restoration Program under Grant Agreement No. F11AP00169 with the USFWS.

Use limitations

Credit authors

Extent

West -122.552288 East -118.955640
North 40.673418 South 35.399003

Scale Range
Maximum (zoomed in) 1:5,000
Minimum (zoomed out) 1:150,000,000

ArcGIS Metadata

Topics and Keywords

Themes or categories of the resource environment, biota


* Content type Downloadable Data
Export to FGDC CSDGM XML format as Resource Description No

Place keywords Great Valley, Sacramento Valley, San Joaquin Valley, California

Temporal keywords 2012

Theme keywords Vernal Pools, Hogwallows

Citation

Title Vernal Pool Distribution - California's Great Valley - 2012 [ds1070]
Publication date 2014-08-1300:00:00


Presentation formats * digital map


Citation Contacts

Responsible party
Contact's role publisher


Contact information
Address
Delivery point Sacramento, CA



Responsible party
Organization's name Robert F. Holland
Contact's role originator


Responsible party
Organization's name John Vollmar
Contact's role originator


Responsible party
Organization's name Carol W. Witham
Contact's role originator


Responsible party
Individual's name Carol W. Witham
Contact's position Co-author
Contact's role point of contact


Contact information
Phone
Voice 916-452-5440

Address
Type both
Delivery point 1141 37th Street
City Sacramento
Administrative area CA
Postal code 95816-5415
Country US
e-mail address carolwwitham@gmail.com



Resource Details

Dataset languages English(UNITED STATES)
Dataset character set utf8 - 8 bit UCS Transfer Format


Status completed
Spatial representation type * vector


Supplemental information
The 2005 polygons were sketched onto 2005 NAIP imagery by two independent mappers: Carol W. Witham and Robert F. Holland. Maps were reconciled by the mappers on a polygon-by-polygon basis with the best boundaries and attributes for each discussed and chosen before moving onto the next polygon. For the remapping effort based on the 2012 imagery, Holland and Witham divided up the counties and proceeded to map changes. Each polygon was revisited in the 2012 imagery. If changes in land use had occurred, they were immediately visible in the photo. Where needed, the 2005 polygons were cut into smaller polygons to reflect 2012 conditions and the new geodatabase fields were populated. In some cases, additional habitat was identified-either newly created mitigation banks or habitat missed during the 2005 mapping. New polygons were created to reflect these additional areas of habitat.
* Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.5.1.7333


Credits
Carol W. Witham, Robert F. Holland and John Vollmar. 2014. Changes in the Distribution of Great Valley Vernal Pool Habitats from 2005 to 2012. Sacramento, CA. Report prepared for the U.S. Fish and Wildlife Service and Bureau of Reclamation CVPIA Habitat Restoration Program under Grant Agreement No. F11AP00169 with the USFWS.
ArcGIS item properties
* Name Vernal Pool Distribution - California's Great Valley - 2012 [ds1070]
* Location Server=; :; Database=; User=; Version=
* Access protocol ArcSDE Connection

Extents

Extent
Description
ground condition
Temporal extent
Date and time 2012-01-01

Extent
Geographic extent
Bounding rectangle
Extent type Extent used for searching
* West longitude -122.552288
* East longitude -118.955640
* North latitude 40.673418
* South latitude 35.399003
* Extent contains the resource Yes

Extent in the item's coordinate system
* West longitude -13642458.284400
* East longitude -13242081.312700
* South latitude 4218237.105500
* North latitude 4964289.520200
* Extent contains the resource Yes

Resource Maintenance

Resource maintenance
Update frequency as needed


Resource Constraints

Legal constraints
Other constraints
Public domain
Security constraints
Classification unclassified


Constraints
Limitations of use

Credit authors


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 0.001
M tolerance 0.001
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 8.8(9.3.1.2)


Spatial Data Properties

Vector
* Level of topology for this dataset geometry only


Geometric objects
Feature class name DS1070_20141209
* Object type composite
* Object count 2456



ArcGIS Feature Class Properties
Feature class name DS1070_20141209
* Feature type Simple
* Geometry type Polygon
* Has topology FALSE
* Feature count 2456
* Spatial index TRUE
* Linear referencing FALSE



Data Quality

Scope of quality information
Resource level dataset




Data quality report - Absolute external positional accuracy
Dimension horizontal


Quantitative test results
Value Minimum Mapping Unit


Evaluation method
No minimum mapping unit was established prior to mapping. The map therefore suffers from shortfalls related to economy of scale. In small polygons, the mappers were more likely to subtract small cutouts for buildings, corrals or staging areas. In larger polygons, the same size cutout was often overlooked simply because it was small in proportion to the landscape being mapped.




Data quality report - Absolute external positional accuracy


Distribution

Distribution format
* Name SDE Feature Class


Transfer options
Online source
Location http://bios.dfg.ca.gov/
Function performed information

Online source
Location http://www.vernalpools.org/
Function performed download

Fields

Details for object DS1070_20141209
* Type Feature Class
* Row count 2456
Definition
Polygons representing vernal pool landscapes and individual vernal pools
Definition source
Witham/Holland


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 SHAPE
* Alias FEATURE
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
* Field description
Feature geometry.
* Description source
ESRI
* Description of values
Coordinates defining the features.




Field FEATURE
* Alias COVER_VPs
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Vernal pool matrix or individual pool
Description source
Witham/Holland
List of values
Value 0
Description Vernal pool matrix


Value 1
Description Individual vernal pool




Field COVER_VPs
* Alias DENSITY_VPs
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Cover of vernal pools by cover class
Description source
Witham/Holland
List of values
Value 0
Description <2% cover of vernal pools


Value 1
Description 2-5% cover of vernal pools


Value 2
Description 5-10% cover of vernal pools


Value 3
Description >10% cover of vernal pools


Value 4
Description 100% (individual pool / stockpond)




Field DENSITY_VPs
* Alias DIVERSITY_VPs
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Qualitative density assessment
Description source
Witham/Holland
List of values
Value 0
Description Low


Value 1
Description Medium


Value 2
Description High




Field DIVERSITY_VPs
* Alias NUMBER_LargePools
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Qualitative diversity assessment
Description source
Witham/Holland
List of values
Value 0
Description Low


Value 1
Description Medium


Value 2
Description High




Field NUMBER_LargePools
* Alias DISTURBANCE_Area
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Number of large pools per polygon
Description source
Witham/Holland
List of values
Value 0
Description None in polygon


Value 1
Description <1 per 640 acres


Value 2
Description 1-3 per 640 acres


Value 3
Description 4+ per 640 acres




Field DISTURBANCE_Area
* Alias DISTURBANCE_Type
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Cover of disturbance by cover class
Description source
Witham/Holland
List of values
Value 0
Description <1% of polygon


Value 1
Description 1-5% polygon


Value 2
Description 5-25% of polygon


Value 3
Description 25-50% of polygon


Value 4
Description 50-99% of polygon


Value 5
Description 100% of polygon




Field DISTURBANCE_Type
* Alias DISTURBANCE_Intensity
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Dominant type of disturbance
Description source
Witham/Holland
List of values
Value 0
Description None / unknown


Value 1
Description Plowing, disking or grading


Value 2
Description OHV use


Value 3
Description Ranch roads


Value 4
Description Paved roads


Value 5
Description Ag runoff (altered hydrology)


Value 6
Description Agricultural residential


Value 7
Description Managed wetlands (duck ponds)


Value 8
Description Mitigation banks (created vernal pools)


* Description of values
Positive real numbers that are automatically generated.




Field DISTURBANCE_Intensity
* Alias Converted_2012
* Data type String
* Width 50
* Precision 0
* Scale 0
Field description
Qualitative assessment of intensity of disturbance
Description source
Witham/Holland
List of values
Value 0
Description Low


Value 1
Description Medium


Value 3
Description High


* Description of values
Positive real numbers that are automatically generated.




Field Converted_2012
* Alias Converted_To_2012
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0




Field Converted_To_2012
* Alias Converted_Notes_2012
* Data type String
* Width 50
* Precision 0
* Scale 0




Field Converted_Notes_2012
* Alias Disturbance_Area_2012
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0




Field Disturbance_Area_2012
* Alias Disturbance_Type_2012
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0




Field Disturbance_Type_2012
* Alias Disturbance_Intensity_2012
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0




Field Disturbance_Intensity_2012
* Alias Land_Use_Area
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0




Field Land_Use_Area
* Alias Surrounding_Land_Use_1
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0




Field Surrounding_Land_Use_1
* Alias HABITAT_Notes
* Data type String
* Width 50
* Precision 0
* Scale 0




Field HABITAT_Notes
* Alias Surrounding_Land_Use_3
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Notes on habitat observations
Description source
Witham/Holland


Field Surrounding_Land_Use_3
* Alias MAPPING_Notes
* Data type String
* Width 50
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
Esri
* Description of values
Coordinates defining the features.




Field MAPPING_Notes
* Alias Acres
* Data type Double
* Width 8
* Precision 38
* Scale 8
Field description
Notes used during heads up digitizing
Description source
Witham/Holland


Field Acres
* Alias Surrounding_Land_Use_2
* Data type SmallInteger
* Width 2
* Precision 5
* Scale 0
Field description
Acres calculated from Shape_area
Description source
Witham/Holland
Description of values
Calculated as Shape_area/4046.825 m2/acre




Field Surrounding_Land_Use_2
* Alias COUNTY
* Data type String
* Width 25
* Precision 0
* Scale 0




Field COUNTY
* Alias Shape.STLength()
* Data type Double
* Width 0
* Precision 0
* Scale 0
Field description
County in which habitat polygon occurs
Description source
Witham/Holland
* Description of values
Coordinates defining the features.




Field Shape.STArea()
* Alias Shape_Length
* Data type Double
* Width 8
* Precision 38
* Scale 8




Field Shape.STLength()
* Alias New_Notes
* Data type String
* Width 50
* Precision 0
* Scale 0




Field New_Notes
* Alias Shape_Area
* Data type Double
* Width 8
* Precision 38
* Scale 8




Field Shape_Area0
* 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
* Alias Shape.STArea()
* Data type Double
* Width 0
* Precision 0
* Scale 0
* Field description
Feature geometry.
* Description source
ESRI
* Description of values
Coordinates defining the features.






References

Aggregate Information
Association type cross reference


Aggregate resource name
Title Changes in the Distribution of Great Valley Vernal Pool Habitats from 2005 to 2012


Responsible party
Organization's name Robert F. Holland
Contact's role originator


Responsible party
Organization's name Carol W. Witham
Contact's role originator


Responsible party
Organization's name John Vollmar
Contact's role originator


Responsible party
Contact's role publisher


Contact information
Address
Delivery point Sacramento, CA





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 2017-11-13


ArcGIS metadata properties
Metadata format ArcGIS1.0
Standard or profile used to edit metadata FGDC
Metadata style FGDC CSDGM Metadata


Created in ArcGIS for the item 2014-12-0912:21:48
Last modified in ArcGIS for the item 2017-11-1310:00:59


Automatic updates
Have been performed Yes
Last update 2017-11-1310:00:42


Metadata Contacts

Metadata contact
Individual's name Carol W. Witham
Contact's position Co-author
Contact's role point of contact


Contact information
Phone
Voice 916-452-5440

Address
Type both
Delivery point 1141 37th Street
City Sacramento
Administrative area CA
Postal code 95816-5415
Country US
e-mail address cwitham@ncal.net



Metadata Maintenance

Maintenance
Update frequency not planned


Metadata Constraints

Security constraints
Classification unclassified


Thumbnail and Enclosures

Thumbnail

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