Metadata: DNR Hydrography - All Water Features

DNR Hydrography - All Water Features

This page last updated: 05/29/2018
Metadata created using Minnesota Geographic Metadata Guidelines

Go to Section:
  1. Overview
  2. Data Quality
  3. Data Organization
  4. Coordinate System
  5. Attributes
  6. Distribution - Get Data
  7. Metadata Reference

Section 1: Overview

Originator:DNR Division of Fish & Wildlife - Fisheries Unit

Title: DNR Hydrography - All Water Features

Abstract: Polygons representing all types of open water basin hydrographic features derived from the Open Water Basins feature class of the DNR Hydrography Dataset (i.e., MN DNR's authoritative SDE data storage for hydrographic spatial features).

Purpose: To provide a comprehensive, statewide hydrography layer which serves as the base GIS layer for all DNR business needs, including mapping, analysis, reporting, statuatory responsibilities, etc. Examples of uses are regional hydrographic modeling/analysis, basemapping, limnological studies, and linkage to Fisheries data.

Time Period of Content Date: 09/20/2012

Currentness Reference: Re-delineations and edits are frequent and occur as needed. See the attributes DELINEATION_DATE and DELINEATION_SRC for date and source of each polygon.

Progress: Complete

Maintenance and Update Frequency: As needed

Spatial Extent of Data: Statewide

Bounding Coordinates: -97.23

Place Keywords: Minnesota, border waters

Theme Keywords: Hydrography, Water, Lakes, Wetlands, inlandWaters

Theme Keyword Thesaurus:

Access Constraints: None

Use Constraints: None

Contact Person Information: Lyn Bergquist, GIS Data Contact
Minnesota DNR - Fisheries Unit
500 Lafayette Rd
Saint Paul, MN  55155
Phone: 651-259-5189

Browse Graphic: None available

Associated Data Sets: Polygons are derived from the Open Water Basins feature class of the DNR Hydrography Dataset. Many other data layers are derived from this core feature class, including:

Section 2: Data Quality

Attribute Accuracy: WB_CLASS attributes retain the original USGS USCLASS waterbody types except where noted (see LINEAGE for a description of changes to 'Drainage' status). The WB_CLASS of many waterbodies (especially small ones and non-managed features) are highly variable and may not reflect current real world conditions. DNR attributes have generally high accuracy. DNR Lake IDs (DOW Numbers) match those of polygons in the DNR Hydrography - Public Waters Basins layer.

Logical Consistency: Polygons are closed and do not overlap. Some polygons are multi-part (i.e., a single feature made up of multiple parts which share the same set of attributes).

Completeness: Data exist statewide. However, the source datasets upon which this feature class is built are quite old (1960-1980's vintage). Minnesota hydrography and the techniques used to capture the data have changed over time. Therefore, many features are missing or poorly represented when compared to current aerial photos. While large lakes are well-represented, many small features and many parts of rivers and streams are missing from polygon representation. Original features were digitized at (and intended to be viewed at) 100K and 24K scales, depending on the data source.

Horizontal Positional Accuracy: Horizontal positional accuracy is based originally on the 100K USGS source quadrangles (and for many of the smaller features, on 24K USGS source quadrangles). Polygons for DNR-managed waters have been improved by on-screen digitizing using DOQs and FSA imagery at scales of <= 1:5,000.

Vertical Positional Accuracy: N/A

Lineage: History: This dataset contains a collection of the "best available features" representing various scales and accuracies from the combined legacy sources described below.

Open water polygons were originally based on DNR 1:100,000 scale Hydrography (derived from USGS 100K Digital Line Graph (DLG) data, i.e., the data found on the 1:100,000 USGS topo quad maps). DNR-managed features were assigned DNR Basin IDs (i.e., DOW numbers) and DNR-specific attributes. Additional polygons were added from the DNR 1:24,000 Hydrography source layer (originally derived from 1980's NWI) to fill gaps in the 100K data.

Considerable redigitizing of selected features has taken place since 2000. Attributes have been enhanced to better support DNR business practices. Most improvements were directed at waterbodies managed by the DNR.

WB_CLASS changes (May 2018) - conversion to 'Drained' status: The following process was used to identify and reclassify former hydrographic features that have been drained due to ditching or other factors since the time of the original data capture. For more info, contact Steve Kloiber, MNIT at DNR (EWR).

  • Lake and wetland basins from the DNR Hydrography Open Water basins feature class that were >= 50 acres AND that intersected DNR stream type = (perennial, intermittent, unknown) ditches were selected and flagged as 'potential' drained basins for further review.

  • A Lidar-derived, shaded digital elevation model (DEM) was used to determine if the feature was a topographic depression landform as well as to evaluate visible signs of drainage. Any non-depressional features in the selected dataset were flagged for potential conversion to 'Drained' status.

  • Recent aerial imagery from various years between 2009 to 2017 was used to determine if the feature was predominantly open water or not. The aerial imagery was used to assign each feature to a temporary drainage class of either partially drained, drained, or undrained.

  • The original land survey maps from the General Land Office (GLO) were used to assign a water body type. Features that were meandered or that had a shallow water symbol were classified as lake basins. Features that had marsh symbols or no symbol at all were classified as wetlands.

  • Some additional drained lakebed features that were not part of the original query were added if they were encountered during the review process (e.g., West Three, Middle Three, and East Three were all previously classified as “Lake” when they have clearly been drained).

  • Of the 1,029 features that were reviewed, 362 were classified as 'Drained' or 'Partially-Drained' Lakebeds. Most of the rest were classified as 'Drained' or 'Partially-Drained' Wetlands. The distinction between drained wetland and drained lake was primarily based on the symbology of the GLO maps and to a lesser degree the landform as viewed on the shaded DEM.

  • WB_CLASS changes (July-August 2018) - re-attribution of mine pit features: The following process was used to identify polygons that currently represent mine pits that funciton as permanent hydrographic features vs. those that don't. For more info, contact Lyn Bergquist, MNIT at DNR (FSH).
    --Need to add detail here---

    Section 3: Spatial Data Organization (not used in this metadata)

    Section 4: Coordinate System

    Horizontal Coordinate Scheme: Universal Transverse Mercator

    UTM Zone Number: 15

    Horizontal Datum: NAD83

    Horizontal Units: meters

    Vertical Datum: not applicable

    Vertical Units: Not Applicable

    Depth Datum: not applicable

    Depth Units: Not Applicable

    Section 5: Attributes

    Overview: Attributes have been enhanced over time to better support DNR business practices. The original USCLASS waterbody types have been retained from the USGS DLG dataset and renamed WB_CLASS. The WB_CLASS of some polygons have been updated to better reflect current conditions as indicated on aerial imagery. Several new classes have been added (drained/partially drained lakebeds/wetlands).

    Detailed Citation:

    Table Detail:
    dnr_hydro_features_all - feature class table (Fisheries)
    Field NameValid ValuesDefinitionDefinition Source
    FW_IDenumeratedA unique Fisheries Waterbody ID for joining or linking polygons to DNR Fisheries Lake Survey Oracle DB. FW_IDs are assigned based on how the waterbody is managed by DNR Fisheries (i.e., an FW_ID may correspond to an entire basin '00' or to a specific sub-basin '01','02',etc.DNR Fisheries
    1-18000A valid Fisheries Waterbody IDFisheries Lake Survey DB
    88888A "dummy" Fisheries Waterbody ID representing an alternate representation of a basin (implemented in SDE Dataset only)
    99999A "dummy" Fisheries Waterbody ID representing a non-MN portion of a border water
    WB_CLASSenumeratedHydrologic feature type based on original USCLASS attribute from the USGS 100K DLG dataset (appearing on USGS 100K topo quad maps). Some polygons have been reclassified to better indicate their current hydrologic state. In 2018, Drained and Partially Drained Lakebed and Wetland types were added to reflect prior hydrographic features which no longer contain water due to artificial drainage.USGS 100K DLG data
    Artificial BasinArtificially constructed pond or basin, including farm ponds and waste ponds, which do not meet other descriptionsOrig USGS DLG 100K
    Drained LakebedA former lake that has been drained due to ditching, etc.DNR EWR
    Drained WetlandA former wetland that has been drained due to ditching, etc.DNR EWR
    Fish Hatchery PondFish hatchery or farm; constructed ponds, usually square or rectangular, often sub-divided; may be inside of a building.Orig USGS DLG 100K
    Industrial Waste PondIndustrial water impoundment; constructed ponds, usually square or rectangular.Orig USGS DLG 100K
    Innundation AreaWet areas surrounding a river or stream; floodplain areas, seasonally or periodically flooded.Orig USGS DLG 100K
    Intermittent WaterArea with seasonal or periodic wetness, less often flooded than a wetland. Usually shows an outline of a former or current hydrographic feature on the landscape, although it may be dried up and/or vegetated.Orig USGS DLG 100K
    Island or LandAn island or land feature surrounded by water.Orig USGS DLG 100K
    Lake or PondA well-defined natural basin, often named.Orig USGS DLG 100K
    Mine or Gravel PitGravel pit, mine pit, or quarry filled with water; often in rugged terrain near other pits.Orig USGS DLG 100K
    Natural Ore MineGravel pit, mine pit, or quarry filled with water; often in rugged terrain near other pits. Verified by DNR Lands and Minerals Division.DNR LAM
    Natural Taconite/Ore MineGravel pit, mine pit, or quarry filled with water; often in rugged terrain near other pits. Verified by DNR Lands and Minerals Division.DNR LAM
    Partially Drained LakebedA former lake that has been drained due to ditching, etc.DNR EWR
    Partially Drained WetlandA former wetland that has been drained due to ditching, etc.DNR EWR
    ReservoirA basin or pool formed by restricted flow (e.g., dam) on a river.Orig USGS DLG 100K
    Riverine IslandAn island or land feature surrounded by water within a river.Orig USGS DLG 100K
    Riverine polygonPolygon outline of stream or river features, including pools of major rivers formed by dams.Orig USGS DLG 100K
    Sewage/Filtration PdA pond used for sewage or filtration.Orig USGS DLG 100K
    Tailings PondDisposal pond for leftover material from mining operations; often in rugged terrain near active mine pits; may appear to be dried up.Orig USGS DLG 100K
    WetlandA wetland is a land area that is saturated with water, either permanently or seasonally, such that it takes on the characteristics of a distinct ecosystem (e.g., aquatic vegetation and hydric soils).Orig USGS DLG 100K
    LAKE_CLASS1 to 44Lake Class per DNR Fisheries Investigational Report #417 - 1992DNR Fisheries
    Surface area of waterbody in acres
    Perimeter of shoreline in miles (includes island shoreline)
    UTM Easting (X) of waterbody center
    UTM Northing (Y) of waterbody center
    County Namebdry_counties_in_minnesota.gdb\mn_county_boundaries
    DNR_REGIONenumeratedDNR Administrative Regionbdry_dnr_admin_regions.gdb\dnr_admin_regions
    1Northwest Region (Bemidji)
    2Northeast Region (Grand Rapids)
    3Central Region (St. Paul)
    4Southern Region (New Ulm)
    DNR Fisheries Administrative Areas (Fisheries Office)bdry_dnr_fisheries_admin.gdb\dnr_fisheries_admin
    OUTSIDE_MNenumeratedFlag denoting whether polygon is outside of MN (applies to border waters only)
    NThis part of the waterbody is not outside of MN
    YThis part of the waterbody is outside of MN
    Abbreviation of Agency/Division who digitized the feature
    Date the feature was digitized
    DELINEATION_SRCenumeratedPhoto imagery source used for digitizing the polygon featureDNR Fisheries
    1991 DOQ1991 black & white digital ortho photoquad
    YYYY FSA2004-2018 (year specified) color Farm Service Adminstration photo
    LAMDNR Lands and Minerals polygon
    ORIG DLGOriginal USGS DLG 100K polygonUSGS DLG
    PWIPublic Water (PWI) polygon representing the Ordinary High Water Level (OHWL)DNR Public Waters layer
    Notes regarding delineation of the feature.
    Person who provided and/or approved the actions under APPROVAL_NOTES.
    Date the APPROVAL_NOTES were written or approved.
    Notes regarding the approval of specific attributes or actions.
    HAS_FLAGenumeratedFlag denoting that the waterbody has a special 'Fisheries' status; used for the generation of DNR Quick LayersDNR Fisheries
    NWaterbody is not of a special 'Fisheries' type.
    YWaterbody is of a special 'Fisheries' type and has one or more codes listed under FLAG_TYPEDNR Fisheries
    Date the feature class was published to the DNR GDRS.DNR Fisheries
    FLAG_TYPEenumeratedType of flag specifying 'special' type of lake.
    AQPAquaculture Pond
    CRLCisco Refuge Lake
    DTLDesignated Trout Lake
    FSWFisheries Stocked Waterbody
    SVYFisheries Surveyed Lake
    FINFishing in the Neighborhood (FIN) Pond
    IBIIBI Lake
    INFInfested Water
    LLLarge Lake
    MLMuskie Lake
    PRIPriority Wildlife Lake
    RCLReclaimed Waterbody
    SLSentinel Lake
    SHLShallow Lake
    SNNShipstead Newton Nolan Lake
    STLStream Trout Lake
    WRPWalleye Rearing Pond
    WRWild Rice Lake
    Basin ID of Public Water in LAKESDB database.
    HAS_WLD_FLAGenumeratedFlag denoting that the feature has a special 'Wildlife' status; used for the generation of DNR Quick Layers
    NWaterbody is not of a special 'Wildlife' type.
    YWaterbody is of a special 'Wildlife' type and has one or more codes listed under WLD_FLAG_TYPEDNR Fisheries
    WLD_FLAG_TYPEenumeratedType of flag specifying special type of 'Wildlife' lake.
    DWLDesignated Wildlife Lake
    MWFRMigratory Waterfowl Feeding and Resting Area
    PRIPriority Wildlife Lake
    SHLShallow Lake
    WRWild Rice Lake
    A unique polygon ID
    OW_USEenumeratedFlag denoting whether polygon is used to represent DNR Open Water
    Public Water class (for Public Water basins or Public Water Wetlands only)
    MAP_DISPLAYenumeratedFlag denoting waterbody polygons that are used for web map display
    Waterbody names as used on web map display

    Section 6: Distribution

    Publisher: Minnesota DNR - Division of Fisheries

    Publication Date: 09/20/2012

    Contact Person Information: Zeb Thomas, GIS Data Systems Coordinator
    Minnesota Department of Natural Resources
    500 Lafayette Rd
    Saint Paul, MN  55155
    Phone: 651-259-5637

    Distributor's Data Set Identifier: water_dnr_hydrography.gdb\dnr_hydro_features_all

    Distribution Liability: The Minnesota Department of Natural Resources General Geographic Data License Agreement is online:

    Ordering Instructions: Visit the web site noted in the online linkage section, or send an email to the Distribution Contact listed in this metadata record

    Online Linkage: I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

    Section 7: Metadata Reference

    Metadata Date: 05/29/2018

    Contact Person Information: Lyn Bergquist, GIS Data Contact
    Minnesota DNR - Fisheries Unit
    500 Lafayette Rd
    Saint Paul, MN  55155
    Phone: 651-259-5189

    Metadata Standard Name: Minnesota Geographic Metadata Guidelines

    Metadata Standard Version: 1.2

    This page last updated: 05/29/2018
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