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BLM REA CHD 2012 Adjacent Ecoregions


Identification Information:
Native Data Set Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3000
Description:
Abstract: Ecological regions denote areas of general similarity in ecosystems and in the type, quality, and quantity of environmental resources. They are designed to serve as a spatial framework for the research, assessment, management, and monitoring of ecosystems and ecosystem components. These general purpose regions are critical for structuring and implementing ecosystem management strategies across international, national, province and state agencies, and nongovernment organizations that are responsible for different types of resources within the same geographical areas. A Roman numeral hierarchical scheme has been adopted for different levels for ecological regions. Level I is the coarsest level, dividing North America into 15 ecological regions. Level II divides the continent into 50 regions. At Level III, there are currently 181 ecological regions for North America. These files of Level I ecological regions of North America are a 2010 update and revision of files developed by Canada, the United States, and Mexico in 2006, which were an update of earlier files from the late 1990's in a cooperative project for the Commission for Environmental Cooperation (CEC 1997). The CEC was created under the North American Agreement on Environmental Cooperation (NAAEC) to address regional environmental concerns, help prevent potential trade and environmental conflicts and promote the effective enforcement of environmental law. The Agreement complements the environmental provisions established in the North American Free Trade Agreement (NAFTA). The 2006 version of North American ecological regions was developed in a meeting between representatives of the three nations in April 2006 in Newport, Oregon. This 2010 version updates mainly the United States ecoregions in those states where new ecoregion mapping has occurred since 2006, particularly in Michigan, New York, and New England. Issues relating to topology (overlaps and gaps in the data) and to waterbodies were the only revisions for Canada and Mexico. Many small waterbodies in Mexico and in coastal areas of the United States were merged with surrounding ecoregions to conform with their depiction in the interior United States and Canada. The 2010 files are considered draft and subject to further refinements.Commission for Environmental Cooperation. 1997. Ecological regions of North America: toward a common perspective. Commission for Environmental Cooperation, Montreal, Quebec, Canada. 71pp. U.S. Environmental Protection Agency, 2010, Level III ecoregions of the continental United States (revision of Omernik, 1987): Corvallis, Oregon, USEPA National Health and Environmental Effects Research Laboratory, Map M-1, various scales. Comments and questions regarding the North America Ecoregions should be addressed to Glenn Griffith, USGS, c/o US EPA., 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4465, email:griffith.glenn@epa.gov. Alternate: James Omernik, USGS, c/o US EPA, 200 SW 35th Street, Corvallis, OR 97333, (541)-754-4458, email:omernik.james@epa.gov
Purpose: Ecoregion maps assist managers of aquatic and terrestrial resources to understand the regional patterns of the realistically attainable quality of these resources
Supplemental Information: Electronic versions of ecoregion maps and posters, as well as other ecoregion resources are available at: https://www.epa.gov/eco-research/ecoregions. Symbology layers for US Levels III and IV also available. Level IV ecoregions are not complete for California and Arizona, as of May, 2010. For these states, the polygons are for Level III or lower. The field "US_L4CODE" contains placeholder information derived from "US_L3CODE". Ecoregions were digitized at 1:250,000 scale and are intended for large geographic extents (i.e. states, multiple counties, or river basins). Use for smaller areas, such as individual counties or a 1:24,000 scale map boundary, is not recommended.
Citation:
Citation Information:
Title: BLM REA CHD 2012 Adjacent Ecoregions
Geospatial Data Presentation Form: vector digital data
Originator: U.S. Environmental Protection Agency
Publication Information:
Publisher: U.S. EPA Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL)
Publication Place: Corvallis, OR
Larger Work Citation:
Citation Information:
Publication Date: 20100501
Online Linkage: https://landscape.blm.gov/CHD_2012_layerpackages/CHD_NA_CEC_Eco_Level3_AdjacentEcoregions.lpk
Time Period of Content:
Currentness Reference: publication date
Time Period Information:
Single Date/Time:
Calendar Date: 20100501
Status:
Progress: Ongoing
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -179.130734092
East Bounding Coordinate: -52.6617748839
North Bounding Coordinate: 83.1104480503
South Bounding Coordinate: 14.5158271064
Keywords:
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Category
Theme Keyword: geoscientificInformation
Theme Keyword: boundaries
Theme:
Theme Keyword Thesaurus: BLM-THEME
Theme Keyword: Geospatial
Theme Keyword: Management
Theme:
Theme Keyword Thesaurus: BLM-REA
Theme Keyword: CHD 2012
Theme Keyword: Chihuahuan Desert
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: DOI
Theme Keyword: Bureau of Land Management
Theme Keyword: BLM
Theme Keyword: Rapid Ecoregional Assessment
Theme Keyword: REA
Place:
Place Keyword Thesaurus: BLM-STATE
Place Keyword: Arizona
Place Keyword: New Mexico
Place Keyword: Texas
Place:
Place Keyword: Selected State, Conterminous United States
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Category
Theme Keyword: biota
Theme Keyword: boundaries
Theme Keyword: environment
Theme Keyword: location
Theme:
Theme Keyword Thesaurus: EPA GIS Keyword Thesaurus
Theme Keyword: Biology
Theme Keyword: Conservation
Theme Keyword: Ecology
Theme Keyword: Ecosystem
Theme Keyword: Land
Theme Keyword: Natural Resources
Place:
Place Keyword Thesaurus: None
Place Keyword: United States
Theme:
Theme Keyword Thesaurus: User
Theme Keyword: US Ecoregion Levels III and IV, North American (CEC) Ecoregion Levels I, II, III
Cross Reference:
Citation Information:
Title: Ecoregions of the United States
Security Information:
Security Classification System: FIPS Pub 199
Security Classification: No Confidentiality
Security Handling Description: Standard Technical Controls
Point of Contact:
Contact Information:
Contact Position: GIS Analyst
Contact Address:
Address Type: mailing and physical address
Address: 200 S.W. 35th St.
City: Corvallis
State or Province: OR
Postal Code: 97333
Country: Unknown
Contact Voice Telephone: (541) 754-4491
Contact Electronic Mail Address: comeleo.randy@epa.gov
Contact Instructions: http://www.epa.gov/
Contact Organization Primary:
Contact Organization: U.S. Environmental Protection Agency, Office of Research & Development (ORD) - National Health and Environmental Effects Research Laboratory (NHEERL)
Contact Person: Randy Comeleo
Use Constraints: These data are provided by Bureau of Land Management (BLM) "as is" and may contain errors or omissions. The User assumes the entire risk associated with its use of these data and bears all responsibility in determining whether these data are fit for the User's intended use. The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived, and both scale and accuracy may vary across the data set. These data may not have the accuracy, resolution, completeness, timeliness, or other characteristics appropriate for applications that potential users of the data may contemplate. The User is encouraged to carefully consider the content of the metadata file associated with these data. These data are neither legal documents nor land surveys, and must not be used as such. Official records may be referenced at most BLM offices. Please report any errors in the data to the BLM office for which it was obtained. The BLM should be cited as the data source in any products derived from these data. Any Users wishing to modify the data should describe the types of modifications they have performed. The User should not misrepresent the data, nor imply that changes made were approved or endorsed by BLM. This information may be updated without notification.-------Original Text-------None
Access Constraints: None, these data are considered public domain-------Original Text-------None
Data Quality Information:
Lineage:
Source Information:
Source Contribution: The state borders were derived from the dtl_st.sdc on the ArcGIS DVD provided by ESRI. It was modified by removing Alaska and Hawaii polygons and all but the State field, adding some coastal islands based on imagery or NHDPlus areas, and restoring topology (removing internal gaps and small overlaps). The EPA regions were added to this custom geodatabase (dtl_48plyf) prior to the intersection process with the seamless ecoregion data.
Source Citation:
Citation Information:
Originator: Unknown
Publication Date: Unknown
Title: Unknown
Process Step:
Process Date: 20100526
Process Description: 1) U.S.G.S. 1:250,000 topographic maps are used to delineate the ecoregions. The lines drawn are manually digitized or scanned to produce georeferenced electronic files. 2) All base maps are joined together and errors along the edges are resolved. 3) Topology is established and the maps are reviewed for accuracy, completeness, and conformity with the original lines. Corrections are made as needed and topology regenerated. 4) Attributes are added. 5) Maps are plotted for visual inspection by two individuals and necessary changes made. 6) Ecoregions from all available states are merged and dissolved to identify and correct inconsistencies. 7) Polygons of the corrected seamless ecoregion features are extended beyond the coastal borders. 8) State and Ecoregion datasets are intersected. 9) Topology errors removed. 10) Final QA
Process Contact:
Contact Information:
Contact Position: Unknown
Contact Address:
Country: Unknown
Address Type: Unknown
Address: Unknown
City: Unknown
State or Province: Unknown
Postal Code: Unknown
Contact Voice Telephone: Unknown
Process Step:
Process Date: 20101129
Process Description: Metadata imported.
Process Step:
Process Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Sound Science LLC
Contact Person: Nathan Welch
Contact Position: GIS Analyst
Contact Voice Telephone: 208-860-0780
Contact Electronic Mail Address: info@sound-science.org
Process Description: Projected to USA_Contiguous_Albers_Equal_Area_Conic_USGS_version.
Process Date: 2017
Logical Consistency Report: Although ecoregion polygons and attributes have been checked for accuracy, some errors may remain. Polygons along state borders were reviewed and updated, May 2010.
Completeness Report: Ecoregion development is ongoing in the United States and may be integrated into the North America data in the future. This pertains mainly to the states of California and Arizona.
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: Data were collected using methods that have unknown accuracy (EPA National Geospatial Data Policy [NGDP] Accuracy Tier 10). For more information, please see EPA's NGDP at https://www.epa.gov/geospatial/epa-national-geospatial-data-policy)
Attribute Value Accuracy Information:
Attribute Accuracy Report: Unknown
Spatial Data Organization Information:
Direct Spatial Reference Method: Vector
Point and Vector Object Information:
ESRI Terms Description:
ESRI Feature Type: Simple
ESRI Topology: FALSE
ESRI Feature Count: 2548
Spatial Index: TRUE
Linear Referencing: FALSE
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geodetic Model:
Semi-major Axis: 6378137.0
Horizontal Datum Name: D North American 1983
Denominator of Flattening Ratio: 298.257222101
Ellipsoid Name: GRS 1980
Planar:
Map Projection:
Albers Conical Equal Area:
False Northing: 0.0
Standard Parallel: 29.5
Standard Parallel: 45.5
False Easting: 0.0
Longitude of Central Meridian: -96.0
Latitude of Projection Origin: 23.0
Map Projection Name: Albers Conical Equal Area
Planar Coordinate Information:
Coordinate Representation:
Abscissa Resolution: 0.0001
Ordinate Resolution: 0.0001
Planar Distance Units: meters
Planar Coordinate Encoding Method: coordinate pair
Entity and Attribute Information:
Detailed Description:
Entity Type:
Entity Type Label: NA_CEC_Eco_Level3
Entity Type Type: Feature Class
Entity Type Count: 2548
Entity Type Definition: Unknown
Attribute:
Attribute Label: FID
Attribute Definition: Internal feature number.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute Alias: FID
Attribute Type: OID
Attribute Width: 4
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: Shape
Attribute Definition: Feature geometry.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Coordinates defining the features.
Attribute Alias: Shape
Attribute Type: Geometry
Attribute Width: 0
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L3CODE
Attribute Alias: NA_L3CODE
Attribute Type: String
Attribute Width: 20
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L3NAME
Attribute Alias: NA_L3NAME
Attribute Type: String
Attribute Width: 100
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L2CODE
Attribute Alias: NA_L2CODE
Attribute Type: String
Attribute Width: 20
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L2NAME
Attribute Alias: NA_L2NAME
Attribute Type: String
Attribute Width: 100
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L1CODE
Attribute Definition: Code for Level I Ecoregion (North America)
Attribute Definition Source: CEC
Attribute Alias: NA_L1CODE
Attribute Type: String
Attribute Width: 20
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L1NAME
Attribute Definition: Name for Level I Ecoregion (North America)
Attribute Definition Source: CEC
Attribute Alias: NA_L1NAME
Attribute Type: String
Attribute Width: 100
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L3KEY
Attribute Alias: NA_L3KEY
Attribute Type: String
Attribute Width: 125
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L2KEY
Attribute Alias: NA_L2KEY
Attribute Type: String
Attribute Width: 125
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: NA_L1KEY
Attribute Alias: NA_L1KEY
Attribute Type: String
Attribute Width: 125
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: Shape_Leng
Attribute Alias: Shape_Leng
Attribute Type: Double
Attribute Width: 19
Attribute Precision: 0
Attribute Scale: 0
Attribute:
Attribute Label: Shape_Area
Attribute Definition: Area of feature in internal units squared.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Positive real numbers that are automatically generated.
Attribute Alias: Shape_Area
Attribute Type: Double
Attribute Width: 19
Attribute Precision: 0
Attribute Scale: 0
Overview Description:
Entity and Attribute Overview: Unknown
Distribution Information:
Distributor:
Contact Information:
Contact Electronic Mail Address: blm_oc_rea_data_portal_feedback_team@blm.gov
Contact Address:
Address: Building 50, Denver Federal Center
Address: P.O. Box 25047
City: Denver
Address Type: mailing and physical address
Country: USA
Postal Code: 80225-0047
State or Province: Colorado
Contact Voice Telephone: Please email
Contact Organization Primary:
Contact Organization: Bureau of Land Management
Contact Position: Resource Programs Data Coordinator, OC-530
Standard Order Process:
Ordering Instructions: Download from Landscape Approach Data Portal
Digital Form:
Digital Transfer Information:
Format Name: ESRI Layer Package (LPK)
Format Specification: Varies
File Decompression Technique: No compression applied
Digital Transfer Option:
Online Option:
Access Instructions: Download from Landscape Approach Data Portal
Computer Contact Information:
Network Address:
Network Resource Name: https://landscape.blm.gov/CHD_2012_layerpackages/CHD_NA_CEC_Eco_Level3_AdjacentEcoregions.lpk
Fees: N/A
Available Time Period:
Time Period Information:
Single Date/Time:
Calendar Date: 2017
Distribution Liability: The BLM assumes no responsibility for errors or omissions. No warranty is made by the BLM as to the accuracy, reliability, or completeness of these data for individual use or aggregate use with other data; nor shall the act of distribution to contractors, partners, or beyond, constitute any such warranty for individual or aggregate data use with other data. Although these data have been processed successfully on computers of BLM, no warranty, expressed or implied, is made by BLM regarding the use of these data on any other system, or for general or scientific purposes, nor does the fact of distribution constitute or imply any such warranty. In no event shall the BLM have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of the use or reliance on the geographic data or arising out of the delivery, installation, operation, or support by BLM.-------Original Text-------Although these data have been processed successfully on a computer system at the Environmental Protection Agency, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is strongly recommended that careful attention be paid to the contents of the metadata file
Technical Prerequisites: ESRI ArcGIS software, version 10.0 or greater
Resource Description: Downloadable Data
Metadata Reference Information:
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
Metadata Date: 20171207
Metadata Future Review Date: 20140920
Metadata Contact:
Contact Information:
Contact Person Primary:
Contact Organization: US EPA
Contact Person: Randy Comeleo
Contact Position: GIS Analyst
Contact Address:
Address Type: mailing and physical address
Address: 200 S.W. 35th St
City: Corvallis
State or Province: OR
Postal Code: 97333
Country: Unknown
Contact Voice Telephone: (541) 754-4491
Contact Electronic Mail Address: comeleo.randy@epa.gov
Contact Instructions: http://www.epa.gov/
Metadata Review Date: 20101129
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