Identification_Information:
  Citation:
    Citation_Information:
      Originator: Donald Luman
      Originator: Lisa Smith
      Originator: Chris Goldsmith
      Publication_Date: 2003
      Title: Illinois Statewide 30-Meter Shaded Relief Image
      Edition: 20060927
      Geospatial_Data_Presentation_Form: raster digital data
      Series_Information:
        Series_Name: ISGS GIS Database
        Issue_Identification: GISDB.IL_DEM_SHADED_RELIEF_30M_RAS
      Publication_Information:
        Publication_Place: Champaign, IL
        Publisher: Illinois State Geological Survey
      Online_Linkage: http://www.isgs.illinois.edu/
      Online_Linkage: http://illinois.edu
      Larger_Work_Citation:
        Citation_Information:
          Originator: Donald Luman
          Originator: Lisa Smith
          Originator: Chris Goldsmith
          Publication_Date: 2003
          Title: Illinois Surface Topography
          Geospatial_Data_Presentation_Form: map
          Series_Information:
            Series_Name: Illinois Map
            Issue_Identification: 11
          Publication_Information:
            Publication_Place: Champaign, Illinois, USA
            Publisher: Illinois State Geological Survey
          Other_Citation_Details: Scale, 1:500,000. Size, 36 x 54 inches. Color.
  Description:
    Abstract:
      This is a shaded relief image of Illinois in ArcSDE raster format.  The data are stored in UTM coordinates, using a Transverse Mercator projection with the parameters of UTM Zone 16,  NAD27.  The data have a 30-meter ground resolution.

      The source DEM is a mosaicked model of USGS 30x30 meter DEMs, showing 1:24,000-SCALE quadrangle map boundaries that extend in an irregular buffer outside the state boundary.  The source DEM is stored in the ISGS GIS database as GISDB.IL_DEM_30M_RAS.
    Purpose:
      These data were developed to produce an ISGS publication entitled Illinois Surface Topography, Illinois Map 11, 2003.

      These data are appropriate for use in local and regional elevation analysis.  The data are not appropriate as a geodetic, legal or engineering base.  The data set can serve as an important base cartographic and analytical element for many types of maps.  The data set was not and is not intended as a substitute for surveyed elevations, such as can be determined by a registered Public Land Surveyor.
  Time_Period_of_Content:
    Time_Period_Information:
      Single_Date/Time:
        Calendar_Date: 20011018
    Currentness_Reference: Last update with updated USGS DEM data
  Status:
    Progress: Complete
    Maintenance_and_Update_Frequency: None planned
  Spatial_Domain:
    Bounding_Coordinates:
      West_Bounding_Coordinate: -91.5336
      East_Bounding_Coordinate: -87.2490
      North_Bounding_Coordinate: 42.6108
      South_Bounding_Coordinate: 36.8568
  Keywords:
    Theme:
      Theme_Keyword_Thesaurus: None
      Theme_Keyword: DEM
      Theme_Keyword: digital elevation model
      Theme_Keyword: elevation
      Theme_Keyword: 30-meter
      Theme_Keyword: shaded relief
      Theme_Keyword: landform
    Place:
      Place_Keyword_Thesaurus:
        U.S. Department of Commerce, 1977, Countries,
        dependencies,areas of special sovereignty, and
        their principal administrative divisions
        (Federal Information Processing Standard 10-3):
        Washington, D.C., National Institute of Standards
        and Technology.
      Place_Keyword: IL
  Access_Constraints:
    ISGS information must be obtained directly from the ISGS or from an authorized distributor.  Be aware that ISGS information obtained from an unauthorized third party may have been altered subsequent to original distribution, or may no longer be current.

    Any access to these data, Web sites, computer systems, electronic services, and electronic networks is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice.

    Links to these are provided in the Cross References section.
  Use_Constraints:
    ISGS information is the property of and copyrighted by the Board of Trustees of the University of Illinois with all rights reserved. University copyright policy is stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4.  A link is provided in the Cross References section.

    Individuals or entities may make fair use of copyrighted ISGS material, such as reproducing a single figure or table, or using a brief text quotation, without obtaining formal permission, but in all cases the Illinois State Geological Survey must be credited as the source of the material. To reproduce ISGS information beyond the fair use standard, permission must be obtained from the ISGS Information Office, 615 East Peabody Drive, Champaign, Illinois 61820, 217-333-4747, isgs@isgs.illinois.edu. License fees and a license agreement may be required, depending on the proposed usage.

    Any use of these data is governed by University and campus policies, in particular, but not limited to, the Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign, the ISGS Terms of Use document available at the ISGS Web site, and the University of Illinois Web Privacy Notice.  Links to these are provided in the Cross References section.

    Map information is to be used at a scientifically and cartographically appropriate scale, that is, at a scale no greater than indicated on the map or as described in the documentation of the map or map data. Map information is not appropriate for, and is not to be used as, a geodetic, legal, or engineering base. Map information has no legal basis in the definition of boundaries or property lines and is not intended as a substitute for surveyed locations such as can be determined by a registered Public Land Surveyor.

    The data do not replace the need for detailed site-specific studies.
  Point_of_Contact:
    Contact_Information:
      Contact_Instructions: Please refer to the Distribution Information section.
  Native_Data_Set_Environment: ArcSDE 9.1 on Oracle 10g
  Cross_Reference:
    Citation_Information:
      Title: ISGS Terms of Use
      Online_Linkage: http://www.isgs.illinois.edu
  Cross_Reference:
    Citation_Information:
      Title: University of Illinois Web Privacy Notice
      Online_Linkage: http://www.vpaa.uillinois.edu/policies/web_privacy.cfm
  Cross_Reference:
    Citation_Information:
      Title: University Copyright Policy (stated in the General Rules Concerning University Organization and Procedure, Article III, Section 4)
      Online_Linkage: http://www.uillinois.edu/trustees/rules.cfm#sec34
  Cross_Reference:
    Citation_Information:
      Title: Policy on Appropriate Use of Computers and Network Systems at the University of Illinois at Urbana-Champaign
      Online_Linkage: http://www.fs.uiuc.edu/cam/CAM/viii/viii-1.1.html
Data_Quality_Information:
  Attribute_Accuracy:
    Attribute_Accuracy_Report: None.
  Logical_Consistency_Report: None.
  Completeness_Report: None.
  Positional_Accuracy:
    Horizontal_Positional_Accuracy:
      Horizontal_Positional_Accuracy_Report: Should be consistant for NMAS specification for a 1:24000 scale map.
    Vertical_Positional_Accuracy:
      Vertical_Positional_Accuracy_Report: Half the contour interval of the original USGS topographic survey. A typical interval for Illinois is ten feet although other ranges exist.
  Lineage:
    Source_Information:
      Source_Citation:
        Citation_Information:
          Title: USGS DEMs
      Source_Scale_Denominator: 24000
    Process_Step:
      Process_Description: Imported USGS DEMs to ESRI GRID lattices.
      Process_Date: 2001
    Process_Step:
      Process_Description: Standardized all DEMs to UTM 15 or 16 NAD27 with vertical units in feet, and a cell size of 30 meters. Some DEMs that had a datum of NAD83 were projected to NAD27 with cubic resampling. Vertical units were in feet, meters, and decimeters and were converted by simple multiplication and rounded to the nearest whole foot. DEMs with a 10 meter cell size were resized to a 30 meter grid spacing with cubic resampling.
      Process_Date: 2001
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
    Process_Step:
      Process_Description: Due to a limitation in GRID on the number of input grids while mosaicking all the DEMs were first mosaicked into one degree blocks (latitude and longitude) and then into full mosaicks of the UTM 15 and 16 zones in Illinois. Null areas were fillled in by simple averaging of the surrounding cells.
      Process_Date: 2001
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
    Process_Step:
      Process_Description:
        Final assembly of the statewide DEM was accomplished by reprojecting the UTM 15 side of the state to UTM 16 with cubic resampling and then mosaicking it with the UTM 16 zone.

        The shaded relief image was derived from the DEM.
      Process_Date: 2001
    Process_Step:
      Process_Description: The final tif was imported into the ISGS SDE database using LZ77 compression, the GISDB_RASTER configuration keyword, and a raster block size of 80 x 80.  Several test loads using ISGS procedure GISDB_0016 were performed to determine the appropriate raster block size.  Pyramids were built using bilinear interpolation.  Dataset statistics were calculated.  Database statistics (analyze function) were calculated.  The metadata were updated.
      Process_Date: 20031217
      Process_Contact:
        Contact_Information:
          Contact_Person_Primary:
Spatial_Data_Organization_Information:
  Direct_Spatial_Reference_Method: Raster
  Raster_Object_Information:
    Raster_Object_Type: Pixel
    Row_Count: 21661
    Column_Count: 12665
    Vertical_Count: 1
Spatial_Reference_Information:
  Horizontal_Coordinate_System_Definition:
    Planar:
      Grid_Coordinate_System:
        Grid_Coordinate_System_Name: Universal Transverse Mercator
        Universal_Transverse_Mercator:
          UTM_Zone_Number: 16
          Transverse_Mercator:
            Scale_Factor_at_Central_Meridian: 0.999600
            Longitude_of_Central_Meridian: -87.000000
            Latitude_of_Projection_Origin: 0.000000
            False_Easting: 500000.000000
            False_Northing: 0.000000
      Planar_Coordinate_Information:
        Planar_Coordinate_Encoding_Method: row and column
        Coordinate_Representation:
          Abscissa_Resolution: 30.000000
          Ordinate_Resolution: 30.000000
        Planar_Distance_Units: meters
    Geodetic_Model:
      Horizontal_Datum_Name: North American Datum of 1927
      Ellipsoid_Name: Clarke 1866
      Semi-major_Axis: 6378206.400000
      Denominator_of_Flattening_Ratio: 294.978698
  Vertical_Coordinate_System_Definition:
    Altitude_System_Definition:
Entity_and_Attribute_Information:
  Detailed_Description:
    Entity_Type:
      Entity_Type_Label: Band_1
    Attribute:
      Attribute_Label: ObjectID
      Attribute_Definition: Internal feature number.
      Attribute_Definition_Source: ESRI
      Attribute_Domain_Values:
        Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated.
    Attribute:
      Attribute_Label: Value
    Attribute:
      Attribute_Label: Count
  Overview_Description:
Distribution_Information:
  Distributor:
    Contact_Information:
      Contact_Organization_Primary:
        Contact_Organization: Information Office, Illinois State Geological Survey (ISGS), a division of the Institute of Natural Resource Sustainability (INRS) of the University of Illinois
      Contact_Address:
        Address_Type: mailing and physical address
        Address: 615 East Peabody Drive
        City: Champaign
        State_or_Province: Illinois
        Postal_Code: 61820
        Country: USA
      Contact_Voice_Telephone: 217-333-4747
      Contact_TDD/TTY_Telephone: 217-785-0211
      Contact_Electronic_Mail_Address: isgs@isgs.illinois.edu
      Hours_of_Service: 8:00 a.m. - 4:30 p.m., Monday-Friday, U.S. Central Time
  Distribution_Liability:
    Refer to the Legal Notices of Terms and Conditions of the University of Illinois Web Privacy Policy (there is a link in the Cross References section) for policy statements regarding the following:

    Disclaimer of Liability
    Disclaimer of Warranties and Accuracy of Data
    Disclaimer of Endorsement
    Disclaimer for External Links
    Disclaimer of Duty to Continue Provision of Data
    Security
    Choice of Law

    By obtaining these data you agree to the provisions of the University of Illinois Web Privacy Policy, regardless of the manner in which the information was obtained.
  Technical_Prerequisites: The data are intended for use with GIS software. The ISGS uses ESRI ArcGIS software, however,  ESRI formats can be imported into many different GIS software packages. It is expected that customers who obtain these data have the technical expertise to use GIS software. The ISGS does not provide software support of any kind.
Metadata_Reference_Information:
  Metadata_Date: 20090224
  Metadata_Contact:
    Contact_Information:
      Contact_Organization_Primary:
      Contact_Instructions: Please refer to the Distribution Information section.
  Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
  Metadata_Standard_Version: FGDC-STD-001-1998
  Metadata_Time_Convention: local time
  Metadata_Access_Constraints: The access constraints as stated for the data apply also to the metadata.  Refer to the Access Constraints section of the Identification Information section.
  Metadata_Use_Constraints: The use constraints as stated for the data apply also to the metadata.  Refer to the Use Constraints section of the Identification Information section.
  Metadata_Extensions:
    Online_Linkage: http://www.esri.com/metadata/esriprof80.html
    Profile_Name: ESRI Metadata Profile
