| Originator | Minnesota DNR - MIS Bureau |
| Abstract | Medium scale lake polygons derived from the National Wetlands Inventory (NWI) polygons and MnDOT Basemap lake delineations. Integrated with the DNR 24K Streams Layer. NWI attributes have been transformed into habitat types based on depth and associations with deepwater habitats and rivers. |
| Use Tips | Data are derived directly from: 1) NWI based on criteria for classifying open water within NWI, and 2) MnDOT Basemap Lakes. The DNR 24K Streams layer is integrated with these lakes. DOW number assignment have been assigned using automated processes (from 100K DLG Lakes), without direct validation. Use DOW numbers with caution. These will be refined and updated through time. Similarly, ALT_NAMES have been assigned using automated techniques from Geographic Names and Information System (GNIS) points, and have not been validated for correctness. Polygons from the NWI source have more information than those from the MnDOT source. They can be differentated by: LAKE_SOURCE = NWI -or- DOT. Data between the two source have not been edgematched with regards to their shorelines. Offsets between the data from the two sources are apparent in some areas. |
| Browse Graphic | View a sample of the data. |
| Time Period of Content Date | 1990 |
| Currentness Reference | Data are derived primarily from the National Wetlands Inventory (NWI) which are based on 1990 vintage aerial photography. Some 200 quads of data are based on USGS quadrangle maps, which vary widely in vintage from the early 19980s to early 1990s. |
| Access Constraints | Data are unrestricted with regards to access |
| Use Constraints | Use of the data are contrained only by the DNR GIS Data License Agreement |
| Distributor Organization | DNR-MIS |
| Ordering Instructions | See Online Linkage or Distribution Contact |
| Online Linkage | http://deli.dnr.state.mn.us/ |
| Section 1 | Identification Information | Top of page | ||
| Originator | Minnesota DNR - MIS Bureau | |||
| Title | DNR 24K Lakes | |||
| Abstract | Medium scale lake polygons derived from the National Wetlands Inventory (NWI) polygons and MnDOT Basemap lake delineations. Integrated with the DNR 24K Streams Layer. NWI attributes have been transformed into habitat types based on depth and associations with deepwater habitats and rivers. | |||
| Use Tips | Data are derived directly from: 1) NWI based on criteria for classifying open water within NWI, and 2) MnDOT Basemap Lakes. The DNR 24K Streams layer is integrated with these lakes. DOW number assignment have been assigned using automated processes (from 100K DLG Lakes), without direct validation. Use DOW numbers with caution. These will be refined and updated through time. Similarly, ALT_NAMES have been assigned using automated techniques from Geographic Names and Information System (GNIS) points, and have not been validated for correctness. Polygons from the NWI source have more information than those from the MnDOT source. They can be differentated by: LAKE_SOURCE = NWI -or- DOT. Data between the two source have not been edgematched with regards to their shorelines. Offsets between the data from the two sources are apparent in some areas. | |||
| Purpose | To serve as the basis for medium scale lake mapping and management. The lakes and rivers polygon component to a comprehensive hydrologic landscape model. | |||
| Time Period of Content Date | 1990 | |||
| Currentness Reference | Data are derived primarily from the National Wetlands Inventory (NWI) which are based on 1990 vintage aerial photography. Some 200 quads of data are based on USGS quadrangle maps, which vary widely in vintage from the early 19980s to early 1990s. | |||
| Progress | ||||
| Maintenance and Update Frequency | Bi-Yearly | |||
| Spatial Extent of Data | Statewide | |||
| Bounding Coordinates | -97.5 -89 49.5 43 |
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| Place Keywords | Minnesota | |||
| Theme Keywords | Lakes, Hydrography, Hydrology, Surface Water, inlandWaters | |||
| Theme Keyword Thesaurus | None | |||
| Access Constraints | Data are unrestricted with regards to access | |||
| Use Constraints | Use of the data are contrained only by the DNR GIS Data License Agreement | |||
| Contact Person Information | Hal Watson,
GIS Database Coordinator DNR-MIS 500 Lafayette Road, Box 11 St. Paul, MN 55155-4011 Phone: (651) 259-5508 FAX: (651) 297-4946 E-mail: | |||
| Browse Graphic | View a sample of the data. | |||
| Browse Graphic File Description | ||||
| Associated Data Sets | |
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| Section 2 | Data Quality Information | Top of full metadata | Top of page | |
| Attribute Accuracy | Source table LAKE_OPENWPY3.DBF: No quantitative assessment of attribute acuracy has been conducted, although qualitatively speaking, data from the NWI source are generally considered to be good representation of open water at the mapping scale. Assignment of Alternate Lake Names were made using automated processes from other sources, and can be expected to contain errors. | |||
| Logical Consistency | Data are topolocially correct using ARC/INFO 7.2.1. All lines intersect where intended. | |||
| Completeness | Data from the NWI source are complete within the constraints of the criteria used to query the data in the first place (see lineage section, below). NWI habitats that fall entirely within DNR lake polygons have been retained even if they do not meet the selection criteria. Data derived from the USGS-DOT source have a minimum mapping resolution of 2 1/2 acres. | |||
| Horizontal Positional Accuracy | Source layer dnrlkpy3: No known quantitative studies of horizontal positional accuracy exist for the data. Positional accuracy can probably be reasonably estimated based on the characteristics of source materials and processing techniques to be 45-60 feet (14 - 18 meters) from correct position. | |||
| Vertical Positional Accuracy | Source layer dnrlkpy3: Not Applicable | |||
| Lineage | Attribute Lineage for source table LAKE_OPENWPY3.DBF: No manual verification was perfomed except for a general sampling of features. Alternate Lake Names were assigned through an overlay process with GNIS lake names and are expected to show uneven quality. This is due to the fact that connected basins were not split during processing, and name assignement in those cases became not resolvable. | |||
| Source Scale Denominator | Source layer dnrlkpy3: 24000 | |||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | Arc/Info 7.x | |||
| Geographic Reference for Tabular Data | Not Applicable | |||
| Spatial Object Type | vector | |||
| Vendor Specific Object Types | polygon | |||
| Tiling Scheme | majwshed | |||
| Section 4 | Spatial Reference Information | Top of full metadata | Top of page | |
| Horizontal Coordinate Scheme | UTM | |||
| Ellipsoid | GRS1980 | |||
| Horizontal Datum | NAD83 | |||
| Horizontal Units | meters | |||
| Distance Resolution | ||||
| Altitude Datum | Not Applicable | |||
| Altitude Units | Not Applicable | |||
| Depth Datum | Not Applicable | |||
| Depth Units | Not Applicable | |||
| Cell Width | ||||
| Cell Height | ||||
| Latitude Resolution | ||||
| Longitude Resolution | ||||
| UTM Zone Number | 15 | |||
| SPCS Zone Identifier | ||||
| County Coordinate Zone Identifier | ||||
| Coordinate Offsets or Adjustments | Not Applicable | |||
| Map Projection Name | Transverse Mercator | |||
| Map Projection Parameters | Not Applicable | |||
| Other Coordinate System's Definition | Not Applicable | |||
| Section 5 | Entity and Attribute Information | Top of full metadata | Top of page | |
| Entity and Attribute Overview | Data Elements for Attribute Table LAKE_OPENWPY3.DBF: WB_TYPE: Type of Water Body DEPTH_DESC: Depth classification HAB_CLASS: General habitat classification of lake area features WB_DESC: Undocumented LAKE_SOURCE: Undocumented NWI_CODE: A unique numeric code assigned to the full Cowardin Classification Description (Foreign Key) ALT_NAME: Lake name as specified in the Geographic Names Information System (GNIS) database |
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| Entity and Attribute Detailed Citation | Value Domain for Data Element WB_TYPE: 1 = Lake 2 = River 3 = Island Value Domain for Data Element DEPTH_DESC: 1 = Greater than 6 meters (NWI L1 habitats) 2 = Less than 6 meters (NWI L2, PUB, PUS, PAB habitats) 88 = Undifferentiated (NWI R or Non-NWI lake source) 99 = Not applicable Value Domain for Data Element HAB_CLASS: 1 = Limnetic zone 2 = Littoral zone 3 = Other shallow habitats associated with Lacustrine or Riverine systems. These habitats are typically 4 = Shallow isolated lakes (NWI PUB, PUS, PAB types) 5 = Riverine 88 = Undifferentiated (Non-NWI source) or Riverine habitat 99 = Not applicable Value Domain for Data Element WB_DESC: Value Domain for Data Element LAKE_SOURCE: DOT = Derived from MnDOT basemap polygons NWI = Derived from National Wetlands Inventory Polygon Value Domain for Data Element NWI_CODE: Value Domain for Data Element ALT_NAME: |
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| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | Minnesota DNR - MIS Bureau | |||
| Publication Date | 2003-09-04 00:00:00.0 | |||
| Contact Person Information | Hal Watson GIS Database Coordinator DNR-MIS 500 Lafayette Road, Box 11 St. Paul, MN 55155-4011 Phone: (651) 259-5508 FAX: (651) 297-4946 E-mail: |
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| Distributor's Data Set Identifier | lake_openwpy3 | |||
| Distribution Liability | The Minnesota Department of Natural Resources makes no representation or warranties, express or implied, with respect to the reuse of data provided herewith, regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, or reliability of this data for any purpose. The user accepts the data 'as is', and assumes all risks associated with its use. By accepting this data, the user agrees not to transmit this data or provide access to it or any part of it to another party unless the user shall include with the data a copy of this disclaimer. The Minnesota Department of Natural Resources assumes no responsibility for actual or consequential damage incurred as a result of any user's reliance on this data. | |||
| Transfer Format Name | Shapefile | |||
| Transfer Format Version Number | Not Applicable | |||
| Transfer Size | 182 | |||
| Ordering Instructions | See Online Linkage or Distribution Contact | |||
| Online Linkage | http://deli.dnr.state.mn.us/ | |||
| Section 7 | Metadata Reference Information | Top of full metadata | Top of page | |
| Metadata Date | 2006-08-09 09:12:09.0 | |||
| Contact Person Information | Tim Loesch,
GIS Manager DNR-MIS 500 Lafayette Road, Box 11 St. Paul, MN 55155-4011 Phone: 651-259-5475 FAX: (651) 297-4946 E-mail: |
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| Metadata Standard Name | Minnesota Geographic Metadata Guidelines | |||
| Metadata Standard Version | 1.2 | |||
| Metadata Standard Online Linkage | http://www.gis.state.mn.us/stds/metadata.htm | |||