| Originator | DNR Division of Fish & Wildlife - Fisheries Unit |
| Abstract | Polygons representing hydrographic features (lakes, ponds, some rivers, and open water areas) originating from the USGS 1:100,000 (100K)DLG (Digital Line Graph) dataset. (USCLASS's 116,400,402,412,421; see attributes). The data have been converted into ArcView and the attribute tables restructured and enhanced to better support DNR business practices. During 2003 and 2004, DNR Division of Waters Lake Numbers were added and many lake outlines have been redigitized at 1:5,000 or better to support DNR Fisheries applications. |
| Use Tips | This layer contains standard DLG 100k hydrography polygon classes representing lakes, ponds, some rivers and other open water areas, especially those which have been assigned a Division of Waters Lake Number (DOWLKNUM). Islands and uplands (coded -9999) are included for completeness and to provide compatibility with applications that were originally built around the source DLG data. DNR Division of Waters Lake Numbers have been added to provide compatibility with DNR business applications. Many delineations are broadly representational at best; for better delineations of public (protected) waters, see the Public Wetlands Inventory (PWI) polygon layer. For all hydrography polygons, see DNR 100K Water (Hydrography). See attribute [REDIG_SRC] for redigitizing information (aerial photo source and year). |
| Browse Graphic | View a sample of the data. |
| Time Period of Content Date | Refer to 100k Quad Date. |
| Currentness Reference | Refer to 100k Quad Date. Selected polygons have been redigitized to match USGS 1991-1992 DOQ aerial photos. |
| Access Constraints | None |
| Use Constraints | None |
| 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 | DNR Division of Fish & Wildlife - Fisheries Unit | |||
| Title | DNR 100K Lakes and Rivers | |||
| Abstract | Polygons representing hydrographic features (lakes, ponds, some rivers, and open water areas) originating from the USGS 1:100,000 (100K)DLG (Digital Line Graph) dataset. (USCLASS's 116,400,402,412,421; see attributes). The data have been converted into ArcView and the attribute tables restructured and enhanced to better support DNR business practices. During 2003 and 2004, DNR Division of Waters Lake Numbers were added and many lake outlines have been redigitized at 1:5,000 or better to support DNR Fisheries applications. | |||
| Use Tips | This layer contains standard DLG 100k hydrography polygon classes representing lakes, ponds, some rivers and other open water areas, especially those which have been assigned a Division of Waters Lake Number (DOWLKNUM). Islands and uplands (coded -9999) are included for completeness and to provide compatibility with applications that were originally built around the source DLG data. DNR Division of Waters Lake Numbers have been added to provide compatibility with DNR business applications. Many delineations are broadly representational at best; for better delineations of public (protected) waters, see the Public Wetlands Inventory (PWI) polygon layer. For all hydrography polygons, see DNR 100K Water (Hydrography). See attribute [REDIG_SRC] for redigitizing information (aerial photo source and year). | |||
| Purpose | To provide a medium scale hydrography layer which is compatible with DNR business applications. Some uses are regional hydrographic analysis, medium scale basemapping, limnological studies, and linkage to Fisheries data. | |||
| Time Period of Content Date | Refer to 100k Quad Date. | |||
| Currentness Reference | Refer to 100k Quad Date. Selected polygons have been redigitized to match USGS 1991-1992 DOQ aerial photos. | |||
| Progress | In Work | |||
| Maintenance and Update Frequency | As Needed | |||
| Spatial Extent of Data | Statewide | |||
| Bounding Coordinates | -97.5 -89 49.5 43 |
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| Place Keywords | Minnesota | |||
| Theme Keywords | Hydrography, Water, Lakes, DOW numbers, inlandWaters | |||
| Theme Keyword Thesaurus | None | |||
| Access Constraints | None | |||
| Use Constraints | None | |||
| Contact Person Information | Lyn Bergquist,
GIS Coordinator DNR-Fisheries 500 Lafayette Road Central Office - Box 20 Saint Paul, MN 55155 Phone: (651) 259-5189 FAX: (651) 297-4961 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_DNRPY2.DBF: The bulk of the attributes are derived from the USGS DLG source, although for lakes with DOW Lake Numbers, the attributes have been reviewed by DNR Fisheries Staff. | |||
| Logical Consistency | Data have been checked usings software tools in ArcView 8.x and 3.x. Topology verified using ArcInfo 8.x clean and build. | |||
| Completeness | Data exist statewide. Lake data are consistently complete at a minimum feature size of approximately 5 acres with mapping to the 2 acre level present in some areas. Redigitizing efforts to improve lake outlines continues (2004). | |||
| Horizontal Positional Accuracy | Source layer lake_dnrpy2: Horizontal positional accuracy is based originally on 100k USGS source quadrangles, and has been improved by on-screen digitizing over USGS 1991-1992 DOQ imagery. | |||
| Vertical Positional Accuracy | Source layer lake_dnrpy2: Not Applicable | |||
| Lineage | Attribute Lineage for source table LAKE_DNRPY2.DBF: Attributes began with USGS DLG source data and in 2003-2004 were reviewed and updated where possible by DNR Fisheries GIS staff. | |||
| Source Scale Denominator | Source layer lake_dnrpy2: 100000 | |||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | Shapefile | |||
| Geographic Reference for Tabular Data | ||||
| Spatial Object Type | vector | |||
| Vendor Specific Object Types | polygon | |||
| Tiling Scheme | state | |||
| 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 | Source layer lake_dnrpy2: Horizontal positional accuracy is based originally on 100k USGS source quadrangles, and has been improved by on-screen digitizing over USGS 1991-1992 DOQ imagery. | |||
| 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_DNRPY2.DBF: REGION: Numeric code for the DNR region SHORE_MI: Lake shoreline length in miles (includes length of island shorelines) FLID: Unique Fisheries Lake ID as per Fisheries Lake Survey Oracle database FSH_OFFICE: Fisheries area office responsible for survey and management of this waterbody. CTY_NAME: County name USCLASS: Field that stores the hydrologic feature type, as per the original USGS DLG classification. Code definitions have been expanded by DNR Fisheries, and some features have been re-classified to better reflect current hydrographic conditions. DOWLKNUM: DNR Division of Waters lake ID number MAIN_DOW: The primary DOWLKNUM for a lake (the MAIN DOW number ends in ''''00''''). Some lakes are split into sub-basins for management or study purposes. In this case, sub-basin IDs are assigned; (the DOWLKNUM number will end in ''''01'''', ''''02,'''' etc.) DOW_VERIF: A flag to identify records whose DOW numbers have been validated. For the most part, only those lakes whose DOW numbers are listed in the DNR Fisheries Lake Survey Database (meaning the lake has been surveyed at least once) have been validated. LAKE_NAME: Lake Name per Division of Waters LKDBMAIN database ALT_NAME: Alternate lake name per Division of Waters LKDBMAIN database LAKE_CLASS: This field holds the DNR Fisheries Lake Class value. The Section of Fisheries developed an ecological classification system for Minnesota's lakes based on the analysis of historical survey records. Variables used to develop the models include: lake area, maximum depth, percent littoral area, total alkalinity, secchi disc transparency, shoreline development factor, morphoedaphic index, and Carlson's Trophic status index. Characteristic fish communities were described for each lake class by analyzing historical gill net and trap net data. Fisheries managers use this information to evaluate fish population status, determine the effectiveness of various management actions, and to establish realistic fisheries management goals and objectives. The classification system is described in An Ecological Classification of Minnesota Lakes With Associated Fish Communities, by Dennis H. Schupp. 1992. Investigational Report No. 417, Minnesota Department of Natural Resources, Section of Fisheries, St. Paul, MN. Available online at: http://www.dnr.state.mn.us/publications/fisheries/investigational_reports.html . Click on #417. SRC_VERSION: Source data version; last date polygon shape edited REDIG_SRC: Photo imagery source for redigitizing of water polygon features. ACRES: Polygon area in acres UTMX: UTM X Coordinate of polygon center UTMY: UTM Y Coordinate of polygon center |
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| Entity and Attribute Detailed Citation | Value Domain for Data Element SHORE_MI: Value Domain for Data Element FLID: 1-17100 = Valid FLID codes Value Domain for Data Element FSH_OFFICE: Value Domain for Data Element USCLASS: -99999 = Not a valid hydrography feature. Commonly refers to islands and other land features. 105 = Innundation area; wet areas surrounding a river or stream; floodplain areas, seasonally or periodically flooded. USGS topo quad map shows sparse wetland symbols around linear stream feature(s). 106 = Fish hatchery or farm; constructed ponds, usually square or rectangular, often sub-divided. USGS topo quad map shows blue shaded polygons with text FISH HATCHERY PONDS or similar. 107 = Industrial water impoundment; constructed ponds, usually square or rectangular. USGS topo quad map has blue shaded polygons with brown marks perpendicular to pond boundaries; text says INDUSTRIAL WASTE PONDS or similar. 108 = Artificially constructed pond or basin, including farm ponds and waste ponds, which do not meet other USCLASS code descriptions. 109 = Sewage disposal pond or filtration bed; constructed ponds, usually square or rectangular. USGS topo quad map shows blue shaded polygons with brown marks perpendicular to pond boundaries; text says SEWAGE DISPOSAL PONDS or similar. 110 = Tailings pond (disposal site for leftover material from mining operations); often in rugged terrain near active mine pits; may appear to be dried up. USGS topo quad map shows light purple hatched polygons with text TAILINGS POND or similar. 111 = Wetlands, including marshes, swamps, and bogs. USGS topo quad maps show blue wetland symbols. Wetland boundaries may not be well-defined and can be difficult to identify on an aerial photo. 116 = Bay or estuary. In this data set, applies only to the St. Louis Bay Estuary which flows into Lake Superior. 400 = Rapids within a river or stream; may be downstream of a dam. USGS topo quad map text says RAPIDS or similar. 402 = Gravel pit, mine pit, or quarry filled with water; often in rugged terrain near other pits; water color on air photos may appear turquoise or light blue. USGS topo quad maps show the mine pit symbol and (sometimes) a mine name. 403 = Non-water portion of a mine pit. 412 = Polygon outline of stream or river features, including pools of major rivers formed by dams. USGS topo quad map shows stream or river name. The polygon is often not complete for the entire length of the river/stream. (See DNR 24K Streams layer for a more comprehensive linear coverage of streams and rivers.) 419 = Channel in water area; a distinct channel (polygon) feature lying within an otherwise wetland-dominated area. 421 = Lake or pond; well-defined basins, often named on USGS topo quad map. May include basins in the backwaters of major rivers that are formed from river waters but function as individual basins. 610 = Intermittent hydrography feature, less often flooded than a wetland (code 111). Usually shows an outline of a former or current hydrographic feature on the landscape, although it may be dried up and/or have vegetation. USGS topo quad map shows sparse blue wetland symbols. 612 = Submerged area; usually shows an outline of a current hydrographic feature on the landscape; standing water is usually visible. USGS topo quad map shows solid blue shaded polygons with or next to sparse blue wetland symbols. |
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| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | Minnesota DNR - Division of Fisheries | |||
| Publication Date | 2002-03-29 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_dnrpy2 | |||
| 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 | ||||
| Transfer Size | ||||
| 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 | 2008-11-25 09:32:06.0 | |||
| 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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| 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 | |||