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Geographic Information Systems

Geographic Information Systems. Other Digital Data. 1. Digital Line Graph. Base cartographic data, distributed by USGS. Map created from USGS DLG culture data showing contours, roads, section lines, lakes and streams. http://spatialnews.geocomm.com/whitepapers/usgs_dlg.pdf.

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Geographic Information Systems

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  1. Geographic Information Systems Other Digital Data

  2. 1. Digital Line Graph • Base cartographic data, distributed by USGS Map created from USGS DLG culture data showing contours, roads, section lines, lakes and streams http://spatialnews.geocomm.com/whitepapers/usgs_dlg.pdf

  3. 1. (1) DLG - Data Content • Planimetric data - include transportation, hydrography, administrative, and political boundaries • Topographic data - portray relief • Include spatial data, attribute data, and topology

  4. 1. (2) Data Availability • Large-Scale (1:24,000) • Intermediate-Scale (1:100,000) • Small-Scale (1:2,000,000)

  5. DLG Data Availability .. Map scale Data content

  6. 1.(2) Large-Scale (1:24,000) DLGs • Correspond to the USGS 1:24,000 scale topographic quadrangle maps • Primarily cast to the UTM projection system, but some are cast to the State Plane coordinate system

  7. http://www.cnr.umn.edu/FR/courses/FR3131/Week6update.pdf

  8. Streams layer of Clarence

  9. 1:24,000-Scale DLG data .. West Rapid City, SD http://edc.usgs.gov/geodata/exampldlg24k.html

  10. 1.(2) Intermediate-Scale (1:100,000) DLG • Derived from USGS 30x60-minute quadrangle maps • Cast to the UTM projection system and are referenced to either NAD27 or NAD83 • Available products : • - Individual 1:100,000 DLGs • - 1:100,000-Scale Hydrography • and Transportation

  11. 1:100,000-Scale DLG data .. Coeur D'Alene, ID-MT http://edc.usgs.gov/geodata/exampldlg100k.html

  12. 1.(2) Small-Scale (1:2,000,000) DLG • Derived from the USGS sectional maps from the U.S. National Atlas • Available products : • Current: date between 1990 and 1994 • Historical between 1973 and 1980

  13. Example of 1:2,000,000-Scale DLG Data of the Illinois and Missouri States Hydrography Boundaries, hydrography, and roads http://edc.usgs.gov/geodata/exampdlg.html

  14. 2. Land Use and Land Cover Digital Data (LULC) • Distributed by USGS - 1:250,000 - 1x1 degree - 1:100,000 - 30x60 minutes

  15. 2. LULC Data Contents (1) Land use and land cover    Anderson Classification System Level I (2) Political unit    state, county, and city boundaries (3) Census county subdivision     census tracts for MSA (4) Hydrologic unit     An 8-digit Hydrological Unit Code, region, sub-region, accounting, and cataloging unit (5) Federal land ownership

  16. Anderson Classification System Level I

  17. 1:100,000 LULC Data Anderson classification system

  18. 1:250,000 LULC Data Spokane, WA, land use/land cover, census, and political units http://edc.usgs.gov/geodata/exampleslulc.html

  19. National Land Cover Database (October 1999 Status)

  20. http://aria.arizona.edu/slg/Vandriel.ppt

  21. Hydrologic Unit An 8-digit Hydrological Unit Code, region, sub-region, accounting, and cataloging unit

  22. 3. Soils Data • Developed by USDA Natural Resources Conservation Service (NRCS) • Soil Survey Geographic Data Base (SSURGO) • State Soil Geographic Data Base (STATSGO) • National Soil Geographic Data Base (NATSGO)

  23. 3. Soils - SSURGO • Soil Survey Geographic Data Base (SSURGO) • 1:24,000, 7.5'x7.5'quads • Based on aerial photographs and field survey • Map unit: soil series • Attributes: physical, chemical, biological, land use, etc.

  24. Soils SSURGO

  25. Soils - STATSGO • State Soil Geographic Data Base (STATSGO) • 1:250,000, 1x2 degree coverage • Map unit: soil association • Attribute: 60 soil properties • Attribute structure

  26. STATSGO Map Unit STATSGO data user guider page 5

  27. STATSGO Map Unit .. • STATSGO map units consist of 1 to 21 components • For each component, there are 60 soil properties • For each component, there are 1 to 6 soil layers • For each layer, there are 28 soil properties; for example, percent clay • A map unit identifier created by concatenation of the two-character State FIPS code and a three-digit Arabic number. It uniquely identifies a map unit within a State

  28. STATSGO Attributes A set of relational tables is used to store the attributes for the Map Unit and its Components http://www.ncgc.nrcs.usda.gov/products/datasets/statsgo/data/ny.html

  29. http://www.nysaes.cornell.edu/hort/faculty/pool/NYSite-Soils/nysoilmap.jpghttp://www.nysaes.cornell.edu/hort/faculty/pool/NYSite-Soils/nysoilmap.jpg

  30. http://www.srbc.net/gis/map_gallery.html

  31. 3. Soils - NATSGO • National Soil Geographic Data Base (NATSGO) • 1:7,500,000 • Used primarily for national, regional, and multi-state resource assessment, planning, and monitoring

  32. UNESCO Soils The Digital Soil Map of the World (version 3.0) was released in May 1994 Scale of 1:5,000,000

  33. 4. Digital Raster Graphics Developed by USGS A raster image of a scanned USGS topographic map georeferenced to the UTM grid Useful as a background layer in a GIS, or to be merged with other digital data to produce a hybrid digital file

  34. http://en.wikipedia.org/wiki/Digital_raster_graphic http://topomaps.usgs.gov/drg/

  35. 4. New York State Data Sets • http://cugir.mannlib.cornell.edu/ • http://www.nysgis.state.ny.us/ • http://nationalmap.gov/viewer.html

  36. Example USGS DLG (Digital Line Graph) file showing roads, streets, rivers, etc

  37. Land Cover Map of the Unites States http://www.nasa.gov/vision/earth/environment/Land_Cover_Change.html

  38. http://www.css.cornell.edu/courses/420/lecture8.ppt

  39. 3. Soils - SSURGO Map Unit http://dusk2.geo.orst.edu/virtual/bolstad.pdf

  40. http://nris.state.mt.us/gis/gisdatalib/mtmaps.aspx

  41. A set of relational tables is used to store the attributes for the Map Unit and its Components STATSGO Table Relationships STATSGO data user guider page 10

  42. http://geospatialrevolution.psu.edu STATSGO data user guider page 10

  43. http://www.ncgc.nrcs.usda.gov/products/datasets/ssurgo/index.htmlhttp://www.ncgc.nrcs.usda.gov/products/datasets/ssurgo/index.html

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