Identification_Information: Citation: Citation_Information: Originator: Hitt, K.J. Publication_Date: 1991 Title: Digital map file of major land uses in the United States Edition: 1 Geospatial_Data_Presentation_Form: map Publication_Information: Publication_Place: Reston, Virginia Publisher: U.S. Geological Survey Online_Linkage: http://water.usgs.gov/lookup/getspatial?landuse Description: Abstract: This is a polygon coverage of major land uses in the United States. The source of the coverage is the map of major land uses in the 1970 National Atlas of the United States, pages 158-159, which was adapted from U.S. Department of Agriculture, "Major Land Uses in the United States," by Francis J. Marschner, revised by James R. Anderson, 1967. Purpose: The intended use of this coverage was for the state sections of the 1990-91 National Water Summary on surface-water quality. Each state report contains a map of the state's major land uses and, where possible, discusses the influence of land use on water quality in the state. Supplemental_Information: Related_Spatial_and_Tabular_Data_Sets-- There are separate land use coverages for Alaska and Hawaii. Other_References_Cited-- Anderson, J.R., 1967, Major land uses in the United States, in U.S. Geological Survey, 1970, National atlas of the United States of America: Washington, D.C., U.S. Geological Survey, p. 158-159. U.S. Geological Survey, 1993, National Water Summary 1990-91-- Hydrologic events and stream water quality, U.S. Geological Survey Water-Supply Paper 2400, 590 p. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1991 Currentness_Reference: The data set reflects the currentness (1967) of the source material for the National Atlas plate. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -127.87006102 East_Bounding_Coordinate: -65.40621465 North_Bounding_Coordinate: 48.20435029 South_Bounding_Coordinate: 23.2480104 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Major land uses Theme_Keyword: land use Place: Place_Keyword_Thesaurus: None Place_Keyword: United States Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: None Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: None Access_Constraints: None Use_Constraints: The scale of the data (1:7,500,000) limits its use to broad overviews of land use. Several areas on the scanned map did not register properly with existing 1:2,000,000 base maps. The areas are southwest New Mexico to southwest California and the northwest corner of Maine. The original tics appear to be located properly. The discrepancy might be due to different source maps or error in transforming the scanned copy. Data_Set_Credit: This data set is merely a digital representation of a map that appeared in the National Atlas of the United States. We give credit to Francis J. Marschner and James R. Anderson. The USGS National Water Summary program supported the effort to digitize the hard copy of the map. Security_Information: Security_Classification_System: None Security_Classification: Unclassified Security_Handling_Description: None Native_Data_Set_Environment: dgux, 5.4R3.10, AViiON UNIX, ARC/INFO version 7.0.4 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Dick Paulson checked color plots of all states except Alaska and Hawaii. The data were reviewed on a state-by-state basis when state maps of the data were published in the state summaries in the 1990-91 National Water Summary report (U.S. Geological Survey, 1993). See also Use_Constraints. Quantitative_Attribute_Accuracy_Assessment: Attribute_Accuracy_Value: See Explanation Attribute_Accuracy_Explanation: This is described, where present, with each of the attributes defined in the Entity and Attribute Section. Logical_Consistency_Report: Polygon and chain-node topology present. Completeness_Report: The data is complete for the coterminous United States. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: None. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: None. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1970 Title: National Atlas of the United States of America Source_Scale_Denominator: 7500000 Type_of_Source_Media: mylar Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1967 Source_Currentness_Reference: Current as of publication date. Source_Citation_Abbreviation: None Source_Contribution: Land use spatial delineations and codes. Process_Step: Process_Date: 1990 Process_Description: The following is an overall description of the procedures used to prepare the data set. The detailed processing steps are listed afterwards. Jack Wittmann from USGS-NMD supplied a clear plastic overlay of the linework for the National Atlas plate. The plastic overlay was scanned on the TEK 4991 drum scanner in the Reston GIS lab. The parameters on the scanner were: >.FALSE. >.FALSE. >.FALSE. >Void size = 1 pixel >Dot size = 5 x 5 pixels >.FALSE. >Growing layers = 0 >Thinning layers = 2 >Vectorizing tolerance = 0.100 >Short vector length = 0.000 >Short vector tolerance = 0.100 The resulting TDA file was uploaded to the Prime and was coverted to an ARC/INFO coverage (LANDUSE1) using Ken Lanfear's TEKSCAN.AML. The rest of the processing was accomplished with ARC/INFO. LANDUSE1 was ARCEDITED, and Alaska, Hawaii, pie charts, explanation, and other extraneous pieces were removed. The original tics were deleted and 13 new tics at the locations of latitude/longitude drawn on the plastic were added. The coverage was saved to LANDUSE2. A file (US.LL.TICKS) listing the latitude/longitude of the 13 known locations on the map was projected from Geographic to Albers (US.ALB.TICKS). An empty coverage called LANDUSE5 was created using the TIC file of LANDUSE2. The XTIC and YTIC values of LANDUSE5 were updated to match the Albers coordinates in US.ALB.TICKS. The coverage was transformed into real world coordinates (see log). >TRANSFORM LANDUSE2 LANDUSE5 >Transforming coordinates for coverage LANDUSE2 > >Scale (X,Y) = (7494.289,7506.062) >.FALSE. >Rotation (degrees) = (0.060) >RMS Error (input,output) = (0.075,559.951) > >tic input x input y >id output x output y x error y error >--- ---------------- ---------------- ----------- ----------- > 1 175.728 448.880 > -1376571.000 3135814.000 -167.536 105.741 > 4 466.301 436.361 > 800505.875 3044125.000 492.771 224.574 > 5 649.293 321.795 > 2172901.000 2186024.000 391.808 -97.096 > 6 669.366 249.960 > 2324251.000 1646694.000 37.967 197.569 > 8 576.165 78.041 > 1627249.000 355418.500 -90.194 268.423 > 9 372.580 59.998 > 102183.297 218647.781 -601.385 -70.883 >12 36.876 332.119 > -2416211.000 2258465.000 -209.907 -109.442 > 2 271.951 434.498 > -655443.500 3028804.000 -59.102 -41.203 > 3 369.080 430.334 > 72934.656 2998128.000 -496.067 176.869 > 7 643.081 90.999 > 2128467.000 454241.500 84.084 -732.892 >10 304.459 61.210 > -408619.938 226711.000 -330.653 394.218 >11 53.917 172.453 > -2288723.000 1059890.000 1270.597 139.988 >13 59.335 403.047 > -2248343.000 2791387.000 -322.382 -455.865 The dangling arcs were removed by CLEANING and ARCEDITING. Spiderwebbing along the coastline was removed by ARCEDITING. After polygon topology was built, interior polygons having small areas were checked and the ones that were not part of the land use categories were removed. The linework on the plastic overlay that was scanned did not always agree with the published land use map. In such cases, the linework of the published map was used instead of the scan copy. After the linework was checked, the polygons were tagged using ARCEDIT. Details about the individual processing steps follow. 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: 4351 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 12721 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 4351 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Albers_Conical_Equal_Area: Standard_Parallel: 29.5 Standard_Parallel: 45.5 Longitude_of_Central_Meridian: -96 Latitude_of_Projection_Origin: 23 False_Easting: 0.0 False_Northing: 0.0 Map_Projection_Name: Albers Conical Equal Area Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 1.0 Ordinate_Resolution: 1.0 Planar_Distance_Units: meters Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: LANDUSE.PAT Entity_Type_Definition: Polygon attribute table Entity_Type_Definition_Source: GIS software Attribute: Attribute_Label: AREA Attribute_Definition: Area of polygon in square coverage units Attribute_Definition_Source: Computed by GIS software Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Positive real numbers Enumerated_Domain_Value_Definition: Size of the polygon in coverage units Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of polygon in coverage units Attribute_Definition_Source: Computed by GIS software Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Positive real numbers Enumerated_Domain_Value_Definition: Perimeter of polygon in coverage units Enumerated_Domain_Value_Definition_Source: Computed by GIS software Attribute: Attribute_Label: LANDUSE# Attribute_Definition: Internal feature number Attribute_Definition_Source: Computed by GIS software Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Enumerated_Domain_Value_Definition: Coverage feature number Enumerated_Domain_Value_Definition_Source: Computed by GIS software Attribute: Attribute_Label: LANDUSE-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: Coverage user id number Enumerated_Domain_Value_Definition_Source: GIS software or user defined Attribute: Attribute_Label: LUC Attribute_Definition: Land use code Attribute_Definition_Source: National Atlas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1-17 Enumerated_Domain_Value_Definition: Land use numeric code See Entity_and_Attribute_Overview Enumerated_Domain_Value_Definition_Source: National Atlas Detailed_Description: Entity_Type: Entity_Type_Label: LANDUSE.AAT Entity_Type_Definition: Land use arc attribute file for 48 states Entity_Type_Definition_Source: GIS software Attribute: Attribute_Label: FNODE# Attribute_Definition: Internal number of from-node Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Enumerated_Domain_Value_Definition: Internal number of from-node Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal number of to-node Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Enumerated_Domain_Value_Definition: n/a Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal number of polygon to left of arc Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Enumerated_Domain_Value_Definition: n/a Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal number of polygon to right of arc Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sequential unique positive integer Enumerated_Domain_Value_Definition: n/a Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of arc in coverage units Attribute_Definition_Source: Computed Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Positive real numbers Enumerated_Domain_Value_Definition: n/a Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: LANDUSE# 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: n/a Enumerated_Domain_Value_Definition_Source: GIS software Attribute: Attribute_Label: LANDUSE-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: n/a Enumerated_Domain_Value_Definition_Source: GIS software or user defined Attribute: Attribute_Label: KEEP Attribute_Definition: Flag for displaying the arc or not Attribute_Definition_Source: National Atlas Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0-2 Enumerated_Domain_Value_Definition: See Enumerated_Domain_Value_Definition_Source: User defined Overview_Description: Entity_and_Attribute_Overview: The coverage contains one polygon attribute, LUC (land use code). LUC is derived from the categories of land use listed in the National Atlas plus a category for open water: > 1 = Mostly cropland > 2 = Cropland with grazing land > 3 = Cropland with pasture, woodland, and forest > 4 = Irrigated land > 5 = Woodland and forest with some cropland > and pasture > 6 = Forest and woodland mostly grazed > 7 = Forest and woodland mostly ungrazed > 8 = Subhumid grassland and semiarid grazing land > 9 = Open woodland grazed (pinon, juniper, aspen groves, > chaparral and brush) >10 = Desert shrubland grazed >11 = Desert shrubland mostly ungrazed >12 = Alpine meadows, mountain peaks above timber line, > sparse dry tundra, lava flows, and barren land >13 = Swamp >14 = Marshland >15 = Moist tundra and muskeg >16 = Urban areas >17 = Open water The coverage contains one arc attribute, KEEP. This is a flag for plotting the arc or not. The area of some polygons exceeded the limit for hardware fill on the Versatec plotter, so arcs were added to divide the polygons into smaller ones. The arcs that divide up the large polygons are not plotted as the boundaries of land use categories. >0 = Divides a large polygon; is not to be plotted >1 = Land use boundary >2 = Coastline or island boundary Entity_and_Attribute_Detail_Citation: Not Available Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing address Address: 12201 Sunrise Valley Drive, MS 440 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: h2oteam@usgs.gov Contact_Instructions: Please use email. Distribution_Liability: Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Metadata_Reference_Information: Metadata_Date: 19970923 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: 12201 Sunrise Valley Drive, MS439 City: Reston State_or_Province: VA Postal_Code: 20192 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: h2oteam@usgs.gov Contact_Instructions: Please use email. Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998