1. Geographic Information Systems Other Digital Data

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

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.. 1:24,0007.5'x7.5' 1:100,00030'x30'1:2,000,000multi-states Boundaries - state, county, city ××× Hydrography -streams and water bodies ××× Public land survey system - rectangular system ×× Transportation - roads/trails, railroads, pipelines ××× Other manmade structures - ski lift × Hypsography - contour lines ××× Surface cover - vegetative × Non-vegetative surface cover - sand, gravel, etc × Survey control and markers - positions and elevations × 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 - Individual 1:100,000 DLGs - 1:100,000-Scale Hydrography - 1:100,000-Scale Hydrography and Transportation 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 Current: date between 1990 and 1994 Historical between 1973 and 1980 Historical between 1973 and 1980

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

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 1 Urban or build-up land 2Agricultural 3Rangeland 4 Forest land 5Water 6Wetland 7 Barren land 8Tundra 9 Perennial snow or ice

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

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

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

35. 4. New York State Data Sets ► http://cugir.mannlib.cornell.edu/ http://cugir.mannlib.cornell.edu/ ► http://www.nysgis.state.ny.us/ http://www.nysgis.state.ny.us/ ► http://nationalmap.gov/viewer.html 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. STATSGO Table Relationships STATSGO data user guider page 10 ► ► A set of relational tables is used to store the attributes for the Map Unit and its Components

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

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