Identification_Information: 
    Citation: 
        Citation_Information: 
            Originator: Michigan Center for Geographic Information
            Publication_Date: 20020719
            Title: Statewide Layer:Michigan Geographic Framework
            Edition: Version 2a
            Geospatial_Data_Presentation_Form: Vector digital data
            Publication_Information: 
                Publication_Place: Lansing, MI
                Publisher: Michigan Center for Geographic Information
    Description: 
        Abstract: 
            The Michigan Geographic Framework serves as the digital base map for  State of Michigan government.  
            Currently the Michigan Geographic Framework contains features including roads, rivers, lakes, streams, railroads, political jurisdiction boundaries, power lines, pipelines, school district boundaries, census area tabulation boundaries, and legislative district boundaries.
            
            Specifically, this Michigan base map will consist of an Arc Info coverage which includes features and attributes based on the current TIGER/Line Files, base map features based on both the MDNR MIRIS Files and an enhanced linear referencing system built from the Michigan Accident Location Index (MALI).  The Geographic Framework will serve as a common and standardized infrastructure on which all GIS users of 1:24,000 scale map data can build their applications.  At the heart of the Geographic Framework will be the ability to administer programs that use location-based information and need to relate one database to another geographically. 
            
            Version 2a is the current version of the Michigan Geographic Framework.  Version 2a differs from version 1b as follows: Framework Version 2a, has been positionally improved by using the United States Geological Survey (USGS) 1:12,000 Digital Ortho Quarter Quad (DOQQ) aerial photography to reposition all the named roads in each county.  In addition, higher resolution aerial photographs from Allegan, Kent, Saginaw and Washtenaw  counties were employed in the repositioning process for Version 2a.
        Purpose: 
            The Michigan Geographic Framework is being created to provide:
            · significant cost-savings due to less duplication of effort across agency lines
            · low-cost geographic database for users of GIS
            · a common-standardized product for any area in Michigan
            · a focal-point for establishing partnerships between federal, state, regional, county and local agencies
            · a product that will be a rallying point for creating an ongoing update and maintenance program for transportation and other features like hydrography and municipal boundaries
            · improved communication between agencies involved in geographic information management
            · the cross integration of demographic and natural resource information, and other data sets
            · the ability to look at what-if scenarios that were not possible before
        Supplemental_Information: The framework geography is maintained in the Michigan Georef projection system which ia a form of an Oblique Mercator projection.  All the data items described in data dictionary may not be filled.  The fields are present to allow for future enhancement.  The data set containing the statewide Michigan Geographic Framework is Mgf_sw_2_e00.zip.
    Time_Period_of_Content: 
        Time_Period_Information: 
            Range_of_Dates/Times: 
                Beginning_Date: 1997
                Ending_Date: 20020719
        Currentness_Reference: 
            The geographic structure and attributes of this Michigan framework data set was created based on the 1994 U.S. Census Bureau based TIGER line files as well as the Michigan DNR created MIRIS file (a computerized map digitized from USGS topo maps in the 1970s).  The attributes originated from the 1994 TIGER files.  However, several more recent products were employed as secondary sources to resolve topological, positional and attributional discrepancies.  The following sources were available during the creation of the MGF:
            
             Michigan Dept. of Transportation ACT51 maps through 1999  ( ACT51 maps are annually updated maps created by the MDOT for the purpose of allocating federal highway funds.)
            
            The USPS Michigan ZIP+4 State Directory Copyright 2000 
            
            Qualified Voter File project (QVF) maps begun in 1997.  (The QVF is a Department of State (DOS) program that manages Michigan's registered voters.  The program requires all county, city, township, and village clerks to provide updated and added street, voting precinct, school district and jurisdiction information directly on maps provided by the Michigan Center for Geographic Information.) 
            
            This source information listed was compared with 1992 and 1997 Michigan State University created aerial photographs as well as 1992-2000 USGS Digital Ortho Quad Photos to resolve conflicts between the current framework geography and the MALI.
            
            The above source information was used to create Versions 1a and 1b.  The present version, Framework Version 2a, has been improved by using the United States Geological Survey (USGS) 1:12,000 Digital Ortho Quarter Quad (DOQQ) aerial photography to reposition all the named roads in each county.  The DOQQs were produced in 1992-1999.  In addition, higher resolution aerial photographs from Allegan, Kent, Saginaw and Washtenaw  counties were employed in the repositioning process for Version 2a.
    Status: 
        Progress: Complete
        Maintenance_and_Update_Frequency: As needed
    Spatial_Domain: 
        Bounding_Coordinates: 
            West_Bounding_Coordinate: -90.42458329182
            East_Bounding_Coordinate: -82.41426851042
            North_Bounding_Coordinate: 48.26268423771
            South_Bounding_Coordinate: 41.69602725395
    Keywords: 
        Theme: 
            Theme_Keyword_Thesaurus: None
            Theme_Keyword: Rivers
            Theme_Keyword: Streets
            Theme_Keyword: Roads
            Theme_Keyword: Framework
            Theme_Keyword: Michigan
            Theme_Keyword: Hydrography
            Theme_Keyword: Streams
            Theme_Keyword: Lakes
            Theme_Keyword: Political boundaries
            Theme_Keyword: School District boundaries
            Theme_Keyword: Railroads
            Theme_Keyword: Political jurisdiction boundaries
            Theme_Keyword: Power lines
            Theme_Keyword: Pipelines
            Theme_Keyword: Census area tabulation boundaries
            Theme_Keyword: Legislative district boundaries
        Place: 
            Place_Keyword_Thesaurus: None
            Place_Keyword: State
            Place_Keyword: Michigan
    Access_Constraints: None
    Use_Constraints: None
    Browse_Graphic: 
        Browse_Graphic_File_Name: http://www.state.mi.us/dmb/mic/clearinghouse/graphics/Mich.gif
        Browse_Graphic_File_Description: The Mich.gif graphic contains an example map displaying several common themes from the geographic framework.
        Browse_Graphic_File_Type: GIF - Graphic Interchange Format
Spatial_Reference_Information: 
    Horizontal_Coordinate_System_Definition: 
        Planar: 
            Map_Projection: 
                Map_Projection_Name: Oblique Mercator
                Oblique_Mercator: 
                    Scale_Factor_at_Center_Line: .9996
                    Oblique_Line_Azimuth: 
                        Azimuthal_Angle: 337.255555555556
                        Azimuth_Measure_Point_Longitude: -86 00 00
                    Latitude_of_Projection_Origin: 45 18 43
                    False_Easting: 2546731.496
                    False_Northing: -4354009.816
            Planar_Coordinate_Information: 
                Planar_Coordinate_Encoding_Method: Coordinate Pair
                Coordinate_Representation: 
                    Abscissa_Resolution: .0001
                    Ordinate_Resolution: .0001
                Planar_Distance_Units: Meters
        Geodetic_Model: 
            Horizontal_Datum_Name: North American Datum 1983 (NAD83)
            Ellipsoid_Name: Geodetic Reference System 80 (GRS80)
            Semi-major_Axis: 6378137
            Denominator_of_Flattening_Ratio: 298.257
Entity_and_Attribute_Information: 
    Overview_Description: 
        Entity_and_Attribute_Overview: 
            The entity and attribute information is contained in several PDF documents.  The primary document is MCGI Framework DD.pdf.  This document contains the data dictionary for the Michigan Geographic Framework data set.  The document contains field names, field type and size and appropriate field descriptions and comments.  The other PDF documents relevant to the data set are appendices referred to in the data dictionary descriptions.
            
        Entity_and_Attribute_Detail_Citation: 
            The PDF documents containing entity and attribute information are:
            MCGI Framework DD.pdf, Appendix A.pdf, Appendix B brblbs.pdf, Appendix C Connector.pdf and Appendix D FCC.pdf.  These PDF files are located at http://www.state.mi.us/dmb/mic/clearinghouse/Docs
Distribution_Information: 
    Distributor: 
        Contact_Information: 
            Contact_Person_Primary: 
                Contact_Person: Everett Root
                Contact_Organization: Michigan Center for Geographic Information
            Contact_Position: Geographic Framework Development Manager
            Contact_Address: 
                Address_Type: Mailing and physical address of the distribution contact person
                Address: 
                    111 S Capitol Ave.,   10th Floor
                    
                City: Lansing
                State_or_Province: MI
                Postal_Code: 48933
                Country: USA
            Contact_Voice_Telephone: 517-373-7910
            Contact_Facsimile_Telephone: 517-373-2939
            Contact_Electronic_Mail_Address: roote@michigan.gov
    Resource_Description: Michigan Geographic Framework
    Distribution_Liability: No warranty, expressed or implied is made and no liability is assumed by the State of Michigan in general or the Michigan Center for Geographic Information in specific as to the accuracy or usability of this data.
Metadata_Reference_Information: 
    Metadata_Date: 20020712
    Metadata_Contact: 
        Contact_Information: 
            Contact_Person_Primary: 
                Contact_Person: Daniel Metzger
                Contact_Organization: Michigan Center for Geographic Information
            Contact_Position: Geographic Specialist
            Contact_Address: 
                Address_Type: Mailing and physical address of the distribution contact person
                Address: 111 S Capitol Ave.,   10th Floor
                City: Lansing
                State_or_Province: MI
                Postal_Code: 48933
                Country: USA
            Contact_Voice_Telephone: 517-373-7910
            Contact_Facsimile_Telephone: 517-373-2939
            Contact_Electronic_Mail_Address: metzgerd@michigan.gov
    Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata
    Metadata_Standard_Version: FGDC-STD-001-1998
