Kentucky Geological Survey
Kentucky Geological Survey
Table of Contents
Identification_Information Abstract Purpose Supplemental Information Data_Quality_Information Spatial_Data_Organization_Information Entity_and_Attribute_Information Detailed Description Overview Distribution_Information Metadata_Reference_Section
Identification_Information
Citation_Information Originator: US Environmental Protection Agency Publication_Date: 2002 Title: Level III and IV Ecoregions of the Continental United States Geospatial_Data_Presentation_Format: map Other_Citation_Details: revision of Omernik 1987Description Abstract Ecoregions 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. By recognizing the spatial differences in the capacities and potentials of ecosystems, ecoregions stratify the environment purpose regions are critical for structuring and implementing ecosystem management strategies across federal agencies, state agencies, and nongovernment same geographical areas (Omernik and others, 2000). The approach used to compile this map is based on the premise that ecological regions are hierarchical and can be identified through the analysis of the spatial patterns and the composition of biotic and abiotic phenomena that affect 1987, 1995). These phenomena include geology, physiography, vegetation, climate, characteristic varies from one ecological region to another regardless of the hierarchical level. A Roman numeral hierarchical scheme has been adopted for different levels of ecological regions. Level I is the coarsest level, dividing North America into 15 ecological regions. Level II divides the continent into 52 III, the continental United States contains 104 ecoregions and the conterminous United States has 84 ecoregions (United States Environmental Protection Agency [USEPA] 2002). Level IV is a further subdivision of level III ecoregions. Explanations of the methods used to define the USEPA's ecoregions are given in Omernik (1995), Omernik and others (2000), and Gallant and others (1989). The level IV ecoregions were compiled at a scale of 1:250,000 and depict revisions and subdivisions of earlier level III ecoregions that were originally compiled at a smaller scale (USEPA 2002; Omernik 1987). In this data layer, states where ecoregions have not yet been subdivided to level IV are represented collaborative project primarily between USEPA Regions, USEPA National Health and Environmental Effects Research Laboratory (Corvallis, Oregon), United States Department of Agriculture-Natural Resources Conservation Service (NRCS, the United States Department of Agriculture-Forest Service (USFS), United States Department of the Interior-Geological Survey (USGS)-Earth Resources Observation Systems (EROS) Data Center, and with multiple state environmental and natural resource agencies. The project is associated with an interagency effort to develop a common framework of ecological regions (McMahon and others, 2001). Reaching that objective requires recognition of the differences in the conceptual approaches and mapping methodologies applied to develop the most common ecoregion-type frameworks, including those developed by the USFS (Bailey and others, 1994), the Conservation Service, 1981). As each of these frameworks is further refined, their differences are becoming less discernible. Regional collaborative projects, where some agreement has been reached among multiple resource management agencies, are a step toward attaining consensus and consistency in ecoregion frameworks for the entire nation. For addtional information, contact James M. Omernik, U.S. EPA National Health and Environmental Effects Laboratory (NHEERL), 200 SW 35th Street, Corvallis, OR 97333; phone: (541) 754-4458, email: omernik.james@epa.gov. Or for maps and data information, contact Jeffrey Comstock, Indus Corporation, c/o U.S. EPA National Health and Environmental Effects Laboratory (NHEERL), 200 SW 35th Street, Corvallis, OR 97333; phone: (541) 754-4361; email: comstock.jeffrey@epa.gov. Literature Cited: Bailey, R.G., Avers, P.E., King, T., and McNab, W.H., eds., 1994, Ecoregions and subregions of the United States (map) (supplementary table of map unit descriptions compiled and edited by McNab, W.H. and Bailey, R.G.): Washington, D.C., U.S. Department of Agriculture-Forest Service, scale 1:7,500,000. Bryce, S.A., Omernik, J.M., and Larsen, D.P., 1999, Ecoregions - a geographic framework to guide risk characterization and ecosystem management: Environmental Commission for Environmental Cooperation Working Group, 1997, Ecological regions Gallant, A.L., Whittier, T.R., Larsen, D.P., Omernik, J.M., and Hughes, R.M., 1989, Regionalization as a tool for managing environmental resources: Corvallis, McMahon, G., Gregonis, S.M., Waltman, S.W., Omernik, J.M., Thorson, T.D., Freeouf, J.A., Rorick, A.H., and Keys, J.E., 2001, Developing a spatial framework of common ecological regions for the conterminous United States: Environmental Management, v. 28, no. 3, p. 293-316. Omernik, J.M., 1987, Ecoregions of the conterminous United States (map supplement): Annals of the Association of American Geographers, v. 77, no. 1, p. Omernik, J.M., 1995, Ecoregions - a spatial framework for environmental management, in Davis, W.S., and Simon, T.P., eds., Biological assessment and criteria-tools for water resource planning and decision making: Boca Raton, Florida, Lewis Publishers, p. 49-62. Omernik, J.M., Chapman, S.S., Lillie, R.A., and Dumke, R.T., 2000, Ecoregions of v. 88, no. 2000, p. 77-103. U.S. Department of Agriculture-Soil Conservation Service, 1981, Land resource regions and major land resource areas of the United States: Agriculture Handbook Wiken, E., 1986, Terrestrial ecozones of Canada: Ottawa, Environment Canada, Ecological Land Classification Series no. 19, 26 p. Related Ecoregion Publications: Bryce, S.A., A.J. Woods, J.D. Morefield, J.M. Omernik, T.R. McKay, G.K. Brackley, R.K. Hall, D.K. Higgins, D.C. McMorran, K.E. Vargas, E.B. Petersen, D.C. Zamudio, and J.A. Comstock. In press. Ecoregions of Nevada. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,350,000. Chapman, S.S., J.M. Omernik, G.E. Griffith, W.A. Schroeder, T.A. Nigh, and T.F. Wilton. In press. Ecoregions of Iowa and Missouri. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Griffith, G.E., J.M. Omernik, J.A. Comstock, S. Lawrence, G. Martin, A. Goddard, color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,700,000. Griffith, G.E., J.M. Omernik, J.A. Comstock, M.P. Shafale, W.H. McNab, D.R. Lenat, J.B. Glover, and V.B. Shelburne. In press. Ecoregions of North and South Carolina. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000. Griffith, G., J. Omernik, and J. Comstock. 2002. Ecoregions of South Carolina. U.S. EPA, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 47p. McGrath, C.L., A.J. Woods, J.M. Omernik, S.A. Bryce, M. Edmondson, J.A. Nesser, J. Shelden, R.C. Crawford, J.A. Comstock, and M.D. Plocher. 2002. Ecoregions of Idaho. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,350,000. Woods, A.J., J.M. Omernik, W.H. Martin, G.J. Pond, W.M. Andrews, S.M. Call, J.A. poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,000,000. Chapman, S.S., J.M. Omernik, J.A. Freeouf, D.G. Huggins, J.R. McCauley, C.C. Freeman, G. Steinauer, R.T. Angelo, and R.L. Schlepp. 2001. Ecoregions of Nebraska and Kansas. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,950,000. Griffith, G., J. Omernik, T. Foster, and J. Comstock. 2001. Ecoregions of Georgia. U.S. EPA, National Health and Environmental Effects Research Laboratory, Corvallis, OR. 48p. Woods, A.J., D.A. Lammers, S.A. Bryce, J.M. Omernik, R.L. Denton, M. Domeier, and J.A. Comstock. 2001. Ecoregions of Utah. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,175,000. Woods, A.J., J.M. Omernik, J.A. Nesser, J. Shelden, and S.H. Azevedo. 1999. Ecoregions of Montana. (2 sided, 2 sheet color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000. Bryce, S.A., J.M. Omernik, D.E. Pater, M. Ulmer, J. Schaar, J. Freeouf, R. Johnson, P. Kuck, and S.H. Azevedo. 1998. Ecoregions of North Dakota and South Dakota. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:1,500,000. Griffith, G.E., J.M. Omernik, and S.H. Azevedo. 1998. Ecoregions of Tennessee. (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:940,000. Pater, D.E., S.A. Bryce, T.D. Thorson, J. Kagan, C. Chappell, J.M. Omernik, S.H. sided color poster with map, descriptive text, summary tables, and photographs). Woods, A.J., J.M. Omernik, C.S. Brockman, T.D. Gerber, W.D. Hosteter, and S.H. Azevedo. 1998. Ecoregions of Indiana and Ohio (2 sided color poster with map, descriptive text, summary tables, and photographs). U.S. Geological Survey, Reston, VA. Scale 1:500,000. Purpose Assist managers of aquatic and terrestrial resources in understanding the regional patterns of the realistically attainable quality of these resources. Supplemental_Information Procedures_Used The ecoregion boundaries of Omernik (1987) were originally compiled at a scale of 1:3,168,000 using a variety of scale source maps, and the ecoregion map was published at a display scale of 1:7,500,000. All level IV ecoregion delineations and most all level III revisions are digitized from the U.S.G.S. 1:250,000 base maps. For this coverage, USECO, the revised level III boundaries have been smoothed and generalized appropriately for a 1:7,500,000 display scale. 1) Prior to digitizing, each base map must be initialized to orient the map and relate it in geographic coordinates to the surface of the earth. When the registration tics are entered at the start of digitizing a transformation error of <0.003 must be achieved in order to insure a high level of registration accuracy. The person responsible for digital data entry completes a data sheet describing coverage name, date of entry, and whether a topology for the coverage is established. 1) All level IV ecoregion delineations and most all level III revisions are digitized from the U.S.G.S. 1:250,000 base maps. For this coverage, USECO, the revised level III boundaries have been smoothed and generalized appropriate for a 1:7,500,000 display scale. Prior to digitizing each base map must be initialized to orient the map and relate it in geographic coordinates to the surface of the earth. When the registration tics are entered at the start of digitizing a transformation error of <0.003 must be achieved in order to insure a high level of registration accuracy. The person responsible for digital data entry completes a data sheet describing coverage name, date of entry, and whether a topology for the coverage is established. 2) After each 1:250,000 base map has been digitized, a topology for each coverage is established. This function creates unique identities for each polygon. 3) Next each base map is tested for polygon errors through an internal editing function. Errors are corrected for unlabeled polygons, unclosed polygons, or polygons with more than one label. Topology is reestablished for each coverage and tested again until no error are indicated. 4) The digital coverage is then plotted at the same scale as the original base map. This coverage is overlaid on a light table with the original and visually inspected for replication of original lines with digitized lines. Two individuals independently inspect the coverage for accuracy. Revisions 1. Original lines digitized 1986? (unknown number of revisions between then and now) 2. Updated lines in Ohio and Indiana 1/96 3. updated lines in Tenn. 2/96 4. updated lines western Oregon and Washington 6/6/96 5. updated lines in ND from updated ND level IV lines 9/96 6. updated lines in SD from updated SD level IV lines 9/96 7. deleted # 41 (became part of #42), added 3 new ecoregions (#41, #79, and #80), extended #61 around adirondacks, #34 was extended south to Mexican boarder. 12/96 8. updated line in SD from revised level IV lines in SD 12/96 9. merged Thompson-Okanaga Highlands ecoregion (79) with Northern Rockies (15). Madrean Archipelago (80) item ECO became 79. 2/97 10. updated line in Ohio, and line in central Oregon from revised lines. 10/97 11. updated lines in Wisconsin from revised level IV lines. 11/97 12. updated lines in Montana from revised level IV lines. 1/98 13. Updated lines to agree with lines from the National Interagency Technical Team (NITT). Areas where lines were altered include Ecoregion 4 in Nothern California, slightly shifted to the west; Ecoregions 36, 37, 38 and 39; ecoregion 73, has a tail going up Red River through Louisiana, into S. Arkansas; ecoregion 12 was split into two, 12 and 80 (Snake River Basin and High Desert); Ecoregion 14 was split into two, 14 and 81; Ecoregion 59 was split in Maine, 59 and 82; ecoregion 61 was split into 61 and 83; ecoregion 63, along the east coast, was split into 63 and 84. 14. Updated lines to agree with level III revisions to AL, GA, and KS. Lines were smoothed using alter and vertex move, add, and delete. Ecoregion names were also updated as follows: region #24 changed from "Southern Deserts" to "Chihuahuan Desert", region #80 changed from "Snake River High Desert" to "Northern Basin and Range", and region #13 changed from "Northern Basin and Range" to "Central Basin and Range". 3/99 15. Updated lines in EPA Region 3 from revised level IV lines. Level III lines were also added to NJ separating 63 and 84. Revisions were made for NE representing level IV updates. 3/99 16. Updated level III lines in UT, NE, KS, MD, GA, SC, and AL according to final and latest draft lines for respective level IV ecoregions. 3/00 17. Updated level III lines in OR, WA, ID, MT, UT, NV, SC, GA, NC, KS, NE, and MO according to lines final and latest draft lines for respective level IV ecoregions smoothed by Jim Omernik. 11/00 18. Updated level III lines according to revisions in OR, NV, ID, MS, LA, AL, SC, NC, KY, AR, and WI. 08/2002 jac 19. Level IV ecoregions for states where level III revisions and subdivisions have been compiled have been added to the level III ecoregions. This has resulted in the first level III and IV coverage for the conterminous United States and reflects mapping at level IV as of August 2002. jac 20. Level IV ecoregions were revised for the Mississippi Alluvial Plain and the Cascades in Oregon. 10/2002 Reviews_Applied_to_Data 1. Lines and map were reviewed by ?? 2. Revised lines were reviewed by Alan Woods, Dynamac 3. Revised lines were reviewed by Glenn Griffith, EPA 4. Revised lines were reviewed by David Pater, Dynamac 5. Revised lines were reviewed by Sandy Bryce, Dynamac 6. Revised lines were reviewed by Sandy Bryce, Dynamac 7. Revised lines were reviewed by Jim Omernik, EPA 8. Revised lines were reviewed by Sandy Bryce, Dynamac 9. Revised line was reviewed by Jim Omernik, EPA 10. Revised lines were reviewed by Sandy Bryce, Dynamac 11. Revised lines were reviewed by Shannen Chapman, Dynamac 12. Revised lines were reviewed by Alan Woods, Dynamac 13. Revised lines were reviewed by Jim Omernik, EPA 14. Revised lines were reviewed by Glenn Griffith, NRCS 15. Revised lines were reviewed by Alan Woods, Dynamac 16. Revised lines were reviewed by Alan Woods, Dynamac & Glenn Griffith, NRCS 17. Revised lines were reviewed by Jim Omernik, EPA 18. Revised lines were reviewed by Glenn Griffith, NRCS 19. Compilation of level III and IV ecoregions for the conterminous US have been reviewed by Glenn Griffith, NRCS and Jim Omernik, EPA 20. Revisions were reviewed by Shannen Chapman and Sandy Bryce, Dynamac Related_Spatial_and_Tabular_Data_Sets USECO.DAT - contains items ECO (Ecoregion Code) LEVEL4 (Level IV Ecoregion Code) LEVEL4_ NAME (Level IV Ecoregion Name) LEVEL3 (Level III Ecoregion Code) LEVEL3_NAME (Level III Ecoregion Name) USECO.LUT - contains items ECO (Ecoregion code) and SYMBOL (Lookup symbol) designed to be used with the useco_shd.shd shadeset. Notes: Currentness_Reference: Maintenance_and_Update_Frequency: as needed Access_Constraints: n/a Data_Set_Credit: Completeness_Report: Horizontal_Positional_Accuracy_Report: Vertical_Positional_Accuracy_Report: Cloud_Cover: References_Cited Notes Time_Period_of_Content Range_of_Dates/Times Beginning_Date: 1986 Ending_Date: 3/00 Currentness_Reference Status Progress: 2002 Maintenance_and_Update_Frequency Spatial_Domain Bounding_Coordinates West_Bounding_Coordinate: -127.84195221 East_Bounding_Coordinate: -65.3850796 North_Bounding_Coordinate: 48.18681835 South_Bounding_Coordinate: 22.87753347
Keywords Theme Theme_Keyword_Thesaurus: None Theme_Keyword: Level III ecoregions Place Place_Keyword_Thesaurus: None Place_Keyword: Ecoregions of Continental US, Level III and IV Stratum Stratum_Keyword_Thesaurus: None Stratum_Keyword: Temporal Temporal_Keyword_Thesaurus: None Temporal_Keyword:
Access_Constraints Use_Constraints for use at 1:250,000 or smaller scales Point_of_Contact: See Distribution_Information for contact information.
Data_Set_Credit Security_Information Security_Classification_System: None Security_Classification: UNCLASSIFIED Security_Handling_Description: None
Native_Data_Set_Environment: SunOS UNIX, ARC/INFO version 8.1
Cross_Reference Originator: Omernik, J.M. Publication_Date: 1987 Publication_Time: Title: Ecoregions of the conterminous United States (map supplement) Edition: 1 Geospatial_Data_Presentation_Form: map Series_Information Series_Name: Issue_Identification: Publication_Information Publication_Place: Publisher: Annals of Assoc. of Am. Geogs. Other_Citation_Details: Online_Linkage: Larger_Work_Citation:
Data_Quality_Information
Attribute_Accuracy Attribute_Accuracy_Report: See Entity_Attribute_InformationQuantitative_Attribute_Accuracy_Assessment Attribute_Accuracy_Value: See Explanation Attribute_Accuracy_Explanation: Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.
Logical_Consistency_Report: Polygon and chain-node topology present.
Completeness_Report Positional_Accuracy Horizontal_Positional_Accuracy Horizontal_Positional_Accuracy_Report:
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Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK BUILD US34 POLY Source_Used_Citation_Abbreviation:None Process_Date: 20020722 Process_Time: 1803 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020723 Process_Time: 1100 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020723 Process_Time: 1120 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1419 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT 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Process_Date: 20020724 Process_Time: 1428 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1429 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1439 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1440 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1449 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1450 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1541 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1541 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1545 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT 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Process_Date: 20020724 Process_Time: 1725 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1736 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1736 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1740 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1756 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1807 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1811 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK BUILD US34 POLY Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1812 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK BUILD US34 ARC Source_Used_Citation_Abbreviation:None Process_Date: 20020724 Process_Time: 1812 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 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Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1155 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1156 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1203 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1204 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1213 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1236 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1236 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1238 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/DATA/XWORK/US34 Source_Used_Citation_Abbreviation:None Process_Date: 20020725 Process_Time: 1301 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK 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US34 POLY Source_Used_Citation_Abbreviation:None Process_Date: 20020729 Process_Time: 1645 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK DOCUMENT US34 COPY /DISK/GIS4/ECOREGIONS/OMERNIK/USECO COMSTOCK Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 902 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK DOCUMENT US34 UPDATE COMSTOCK Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 1335 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK COPY US34 USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 1346 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK DOCUMENT USECO_L4 UPDATE COMSTOCK Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 1414 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK EXPORT COVER USECO_L4 USECO_L4.E00 Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 1424 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK DOCUMENT USECO_L4 UPDATE COMSTOCK Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 1457 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK EXPORT COVER USECO_L4 USECO_L4.E00 Source_Used_Citation_Abbreviation:None Process_Date: 20020904 Process_Time: 1505 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK EXPORT COVER USECO_L4 USECO_L4.E00 Source_Used_Citation_Abbreviation:None Process_Date: 20020916 Process_Time: 1418 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK COPY USECO_L4 /DISK/GIS4/ECOREGIONS/OMERNIK/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20020916 Process_Time: 1706 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK COPY /DISK/GIS4/ECOREGIONS/OMERNIK/USECO_L4 USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1623 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1651 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1655 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1656 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1657 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1712 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1718 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1740 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1741 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021007 Process_Time: 1753 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1711 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1712 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1713 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1734 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1735 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1735 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1751 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1751 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1751 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1805 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021015 Process_Time: 1806 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK ARCEDIT /DISK/UBER2/DATA/JOBS/J404.JIM.US4/WORK2/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021016 Process_Time: 836 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK DOCUMENT USECO_L4 UPDATE COMSTOCK Source_Used_Citation_Abbreviation:None Process_Date: 20021016 Process_Time: 841 Source_Produced_Citation_Abbreviation: None Process_Step Process_Description: COMSTOCK COPY USECO_L4 /DISK/GIS4/ECOREGIONS/OMERNIK/USECO_L4 Source_Used_Citation_Abbreviation:None Process_Date: 20021016 Process_Time: 846 Source_Produced_Citation_Abbreviation: None
Spatial_Data_Organization_Information
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information SDTS_Terms_Description SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4000 SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 8540 SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains' Point_and_Vector_Object_Count: 3996
Spatial_Reference_Information
Horizontal_Coordinate_System_DefinitionPlanar Map_Projection: Map_Projection_Name: ALBERS Longitude_of_Central_Meridian: -96 Latitude_of_Projection_Origin: 23 Latitude_of_First_Standard_Parallel: 29.5 Latitude_of_Second_Standard_Parallel: 45.5 False_Easting: 0.00000 False_Northing: 0.00000 Geodetic Model Horizontal_Datum_Name: Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6,378,206.4 Denominator_of_Flattening: 294.98
Entity_and_Attribute_Information
Detailed_Description Entity_Type Entity_Type_Label: US34.NAR Entity_Type_Definition: Ecoregions of US polygon attribute table Entity_Type_Definition_Source: 1:250,000 topo maps Attribute: Attribute_Label: - Attribute_Definition: Ecoregions of US polygon attribute table Attribute_Definition_Source: 1:250,000 topo maps Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: - Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source: Attribute: Attribute_Label: AREA Attribute_Definition: Area of poly/region in square coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: Positive real numbers Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source: Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of poly/region in coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: Positive real numbers Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source: Attribute: Attribute_Label: US34# Attribute_Definition: Internal feature number Attribute_Definition_Source: Computed Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: Sequential unique positive integer Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source: Attribute: Attribute_Label: US34-ID Attribute_Definition: User-assigned feature number Attribute_Definition_Source: User-defined Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: Integer Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source: Attribute: Attribute_Label: ECO Attribute_Definition: Level 3 and 4 Ecoregion code Attribute_Definition_Source: 1:250,000 quads Attribute_Domain_Values Enumerated_Domain Enumerated_Domain_Value: alpha-numeric Enumerated_Domain_Value_Definition Enumerated_Domain_Value_Definition_Source:Overview_Description Entity_and_Attribute_Overview Attributes: Polygon coverage (.PAT) Level III Ecoregions: LEVEL3 LEVEL3_NAME ECO Ecoregion name 1 Coast Range 2 Puget Lowland 3 Willamette Valley 4 Cascades 5 Sierra Nevada 6 Southern and Central California Chaparral and Oak Woodlands 7 Central California Valley 8 Southern California Mountains 9 Eastern Cascades Slopes and Foothills 10 Columbia Plateau 11 Blue Mountains 12 Snake River Plain 13 Central Basin and Range 14 Mojave Basin and Range 15 Northern Rockies 16 Idaho Batholith 17 Middle Rockies 18 Wyoming Basin 19 Wasatch and Uinta Mountains 20 Colorado Plateaus 21 Southern Rockies 22 Arizona/New Mexico Plateau 23 Arizona/New Mexico Mountains 24 Chihuahuan Deserts 25 Western High Plains 26 Southwestern Tablelands 27 Central Great Plains 28 Flint Hills 29 Central Olkahoma/Texas Plains 30 Edwards Plateau 31 Southern Texas Plains 32 Texas Blackland Prairies 33 East Central Texas Plains 34 Western Gulf Coastal Plain 35 South Central Plains 36 Ouachita Mountains 37 Arkansas Valley 38 Boston Mountains 39 Ozark Highlands 40 Central Irregular Plains 41 Canadian Rockies 42 Northwestern Glaciated Plains 43 Northwestern Great Plains 44 Nebraska Sand Hills 45 Piedmont 46 Northern Glaciated Plains 47 Western Corn Belt Plains 48 Lake Agassiz Plain 49 Northern Minnesota Wetlands 50 Northern Lakes and Forests 51 North Central Hardwood Forests 52 Driftless Area 53 Southeastern Wisconsin Till Plains 54 Central Corn Belt Plains 55 Eastern Corn Belt Plains 56 S. Michigan/N. Indiana Drift Plains 57 Huron/Erie Lake Plains 58 Northeastern Highlands 59 Northeastern Coastal Zone 60 Northern Appalachian Plateau and Uplands 61 Erie Drift Plains 62 North Central Appalachians 63 Middle Atlantic Coastal Plain 64 Northern Piedmont 65 Southeastern Plains 66 Blue Ridge 67 Ridge and Valley 68 Southwestern Appalachians 69 Central Appalachians 70 Western Allegheny Plateau 71 Interior Plateau 72 Interior River Valleys and Hills 73 Mississippi Alluvial Plain 74 Mississippi Valley Loess Plains 75 Southern Coastal Plain 76 Southern Florida Coastal Plain 77 North Cascades 78 Klamath Mountains 79 Madrean Archipelago 80 Northern Basin and Range 81 Sonoran Basin and Range 82 Laurentian Plains and Hills 83 Eastern Great Lakes and Hudson Lowlands 84 Atlantic Coastal Pine Barrens Entity_and_Attribute_Detail_Citation: Not Available
Distribution_Information
Metadata_Reference_Section
Metadata_Date: 19021016 Metadata_Contact: Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: 19940608 Metadata_Time_Convention: Local Time Metadata_Security_Information: Metadata_Security_Classification_System: None Metadata_Security_Classification: UNCLASSIFIED Metadata_Security_Handling_Description: None
Last modified: 02-10-16.08:47:21.Wed