| Michigan (Lower Peninsula) GAP Land Stewardship Coverage | |
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Metadata elements shown with blue text are defined in the Federal Geographic Data Committee's (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM) . Elements shown with green text are defined in the ESRI Profile of the CSDGM. Elements shown with a green asterisk (*) will be automatically updated by ArcCatalog. ArcCatalog adds hints indicating which FGDC elements are mandatory; these are shown with gray text.
State, federal and trust (The Nature Conservancy) land boundaries available in digital format with minimum mapping units of 40 acres. Land unit polygons attributed with ownership and manager values and assigned a GAP management status value of 1-4. Dataset is in the Michigan GeoRef coordinate system.
This data was developed as part of the Michigan GAP analysis project. Information produced by the Michigan GAP program will help provide an overview of the distribution and management of Michigan's wildlife and land cover diversity. The land stewardship component of the GAP project combines the attributes of ownership, management, and a measure of intent to maintain biodiversity in order for land stewards to make informed decisions about their management practices.
publication date
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P.O. Box 30444, Stephens T. Mason Building
Michigan Department of Natural Resources
Boundaries for all National Wildlife Refuges in Michigan with the exception of Wyandotte, which is not available in digital format to date.
Boundary for Isle Royal National Park.
National Lakeshore boundaries.
Boundaries for National Lakeshore shoreline zone.
Forest boundaries.
Forest boundaries.
Forest boundaries.
Boundaries for eastern and western forest units.
Boundaries for The Nature Conservancy preserves statewide.
Boundaries for state owned land units, derived from the statewide MDNR Real Estate Information System (REIS) quarter-quarter section coverage.
Michigan Department of Natural Resources facility boundaries. Facilities include: linear state parks, state parks, state game areas, wildlife research areas, state forests, and state fish hatcheries.
Private and public land ownership boundaries for Michigan counties.
Coverage used to clip other coverages along Great Lakes shoreline.
Boundaries for National Lakeshore inland buffer zone.
All national forests projected into Michigan GeoRef, except Manistee N.F. which was created in MGR. Fields in national forest attribute tables modified to match one another. All four national forest shapefiles then merged together into a single Michigan national forest shapefile.
All national lakeshore boundaries projected into Michigan GeoRef, Isle Royale N.P. created in MGR. Both zones (Shoreline and Inland Buffer) from Pictured Rocks merged together to create a single shapefile for the lakeshore. Fields in national park and national lakeshore attribute tables modified to match one another. All three shapefiles merged together into a single Michigan national parks shapefile.
MI National Wildlife Refuges projected into Michigan GeoRef and shapefile modified by removing land parcels from Shiawassee NWR which were listed as 'Proposed' but not yet part of the refuge. Shapefiles for all Michigan federal lands (forests, parks, and refuges) merged together into a single federal land shapefile. Federal shapefile then converted to an Arc polygon coverage using SHAPEARC and REGIONPOLY. Extraneous fields in attribute table were dropped.
MI TNC shapefile converted to Arc polygon coverage using SHAPEARC and REGIONPOLY. Extraneous fields dropped from attribute table and sliver polygons eliminated. TNC and MI Federal lands coverage attribute tables modified to match one another prior to merging together. Coverages intersected to locate extent of overlapping polygons, no substantial overlaps were located. Coverages merged using MAPJOIN, sliver and small polygons (<=100 sq. m) were eliminated, and polygon topology built.
State ownership shapefile attribute table modified by dropping extraneous fields. Table queried for land units (quarter-quarter sections) containing state surface ownership (Surf_cnt > 0 or Fee_cnt > 0), selected features were converted to a new shapefile. GAP attribute fields added to table for adding record data. DNR facilities shapefile used as overlay in order to populate specific ownership, manager, and unit information where state owned 40 acre polygons intersected facilities polygons. Areas which contained a DNR facilty, but in which no 40 acre state parcels existed (i.e. areas with French claims) were added manually to a temporary shapefile (State_Adds) using boundaries from the DNR Facilities shapefile and checked with Rockford Plats for the areas concerned. State Land and State_Adds shapefiles converted to Arc coverages using SHAPEARC, CLEAN (0.1 tolerance) and REGIONPOLY to build polygon topology. Extraneous fields dropped from both coverages and tables modified to allow merging. Coverages intersected to locate significant overlaps, none found, and then merged together using MAPJOIN. Sliver and small polygons (<= 100 sq. m) were eliminated. Single statewide coverage then clipped along Great Lakes shoreline using MI Outline coverage and sliver polygons eliminated.
Modified Federal-TNC Land coverage attribute table to match State Land table. Federal-TNC Land coverage clipped along the northwest Lower Peninsula Great Lakes shoreline (Sleeping Bear Dunes and TNC*269 areas) with modified MI Outline coverage due to excessive overlap into Lake Michigan and which was missed at earlier stages. The INTERSECT Arc command was used to locate areas of overlap between the State Land and Federal-TNC coverages. Since there were a number of overlapping areas, records in the intersect coverage were updated to reflect whether polygons were State inholdings among Federal-TNC land or the reverse case. The intersect coverage was then SPLIT into two coverages to be used with the ERASE Arc command in order to make "holes" in the complimentary coverage for a MAPJOIN to work properly. For instance, the State inholdings intersect coverage was used to ERASE polygons in the Federal-TNC, thereby creating a space for a polygon from the State coverage. Following MAPJOIN of the coverages, topology and the attrubute table were checked for errors or discrepencies. A large number of sliver polygons were eliminated, manually and using the ELIMINATE Arc command, primarily where State and Federal boundaries did not edgematch cleanly. The statewide coverage was clipped into two separate coverages, Upper Peninsula and Lower Peninsula, due to the large number of records.
Coverage attribute table was modified to final GAP format, extraneous REIS table fields dropped and an Acres field added. GAP land stewardship fields (e.g. owner, manager) updated to reflect management responsibility and GAP status determined for land management entities. Michigan Georef projection parameters defined for the coverage.
Interval Feature Identifier
Attribute identifier used internally by ArcView.
Polygon area calculated by Arc/Info in square meters.
Polygon perimeter, sum of arcs in meters, calculated by Arc/Info.
Sequential polygon order, internally assigned by Arc/Info
Unique numbering sequence for polygons, assigned by Arc/Info
GAP code for the primary entity charged with managing the land unit, plus the type of land it is, with the first two digits indicating the managing entity and the second two the land type.
Land Stewardship chapter of GAP Handbook.
National Wildlife Refuge
National GAP standards
National Forest
Project defined
National Lakeshore
National GAP standards
National Park
National GAP standards
State of Michigan
Project defined
State Military Land
Project defined
State Forest
Project defined
State Fish Hatchery
Project defined
State Parks and Recreation Area
National GAP standards
State Wildlife Reserve
National GAP standards
State Game Area
Project defined
The Nature Conservancy
National GAP standards
Unknown
National GAP standards
GAP code for the legal owner. Will usually be indicated by 2 digits followed by two zeros.
Land Stewardship chapter of GAP Handbook.
U.S. Fish and Wildlife Service
National GAP standards
U.S. Forest Service
National GAP standards
U.S. National Park Service
National GAP standards
State of Michigan
Project defined
The Nature Conservancy
National GAP standards
Ownership unknown
National GAP standards
Categoriztion of management status for land units.
Land Stewardship chapter of GAP Handbook.
An area having permanent protection from conversion of natural land cover and a mandated management plan in operation to maintain a natural state within which disturbance events (of natural type, frequency, intensity, and legacy) are allowed to proceed without interference or are mimicked through management.
National GAP Standards
An area having permanent protection from conversion of natural land cover and a mandated management plan in operation to maintain a primarily natural state, but which may receive uses or management practices that degrade the quality of existing natural communities, including suppression of natural disturbance.
National GAP Standards
An area having permanent protection from conversion of natural land cover for the majority of the area, but subject to extractive uses of either a broad, low-intensity type (e.g. logging) or localized intense (e.g. mining). It also confers protection to federally listed endangered and threatend species throughout the area.
National GAP Standards
There are no known public or private institutional mandates or legally recognized easements or deed restrictions held by the managing entity to prevent conversion of natural habitat types to anthropogenic habitat types. The area generally allow conversion to unnatural land cover throughout.
National GAP Standards
The primary unit comprised of the internal management units of the managing entity.
General category to describe the land owner / manager.
The name the managing entity uses to identify the land unit or internal management unit.
Two digit Michigan county code (01-83) derived from alphabetic name order, where value already present in data.
State of Michigan, state land ownership coverage.
Alcona
Alger
Allegan
Alpena
Antrim
Arenac
Baraga
Barry
Bay
Benzie
Berrien
Branch
Calhoun
Cass
Charlevoix
Cheboygan
Chippewa
Clare
Clinton
Crawford
Delta
Dickinson
Eaton
Emmet
Genesee
Gladwin
Gogebic
Grand Traverse
Gratiot
Hillsdale
Houghton
Huron
Ingham
Ionia
Iosco
Iron
Isabelle
Jackson
Kalamazoo
Kalkaska
Kent
Keweenaw
Lake
Lapeer
Leelanau
Lenawee
Livingston
Luce
Mackinac
Macomb
Manistee
Marquette
Mason
Mecosta
Menominee
Midland
Missaukee
Monroe
Montcalm
Montmorency
Muskegon
Newaygo
Oakland
Oceana
Ogemaw
Ontogagon
Osceola
Oscoda
Otsego
Ottawa
Presque Isle
Roscommon
Saginaw
St. Clair
St. Joseph
Sanilac
Schoolcraft
Shiawassee
Tuscola
Van Buren
Washtenaw
Wayne
Wexford
Area in acres for each land unit polygon as calculated from the AREA field. Equation is ACRES=AREA/4046.87
Area in hectares for each land unit polygon as calculated from the AREA field. Equation is HECTARES=AREA/10000
General categorization of land ownership types, primarily to compensate for non-public polygons internal to public land tracts in Arc coverages.
Owned/managed by government agencies (e.g. - state, federal).
Land parcels internal to public land tracts, and not determined to be public (e.g. - private, corporate, tribal).
Non-government land managed in the public trust (e.g. - TNC lands).
P.O. Box 30444, Stephens T. Mason Building
The Michigan Department of Natural Resources assumes no liability for results or conclusions drawn from use of this data.
Can be downloaded for free from the Michigan DNR Spatial Data Library at www.state.mi.us/spatialdatalibrary
Inquire about special distribution services.
P.O. Box 30444, Stephens T. Mason Building