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The original Hennepin County Wetland Inventory (HCWI) was developed from the remote sensing of multiple years of orthophotograpy in combination with the analysis of related GIS layers and 10 years of Natural Resources Conservation Service slide reviews to identify and include farmed wetlands. The HCWI does not classify wetlands but merely locates them, whereas the NWI classifies wetlands based on the Cowardin methodology utilizing remotely gathered data and photo signature. For more information concerning detail on procedures followed to develop the HCWI contact Hennepin County Dept. of Environmental Services.National Wetland Inventory Metadata:The National Wetland Inventory (NWI) for east-central Minnesota were updated through multi-agency collaborative effort under leadership from the Minnesota DNR. Operational support for wetland mapping and classification was provided by Ducks Unlimited and support for methods development and field validation were provided by the Remote Sensing and Geospatial Analysis Laboratory at the University of Minnesota. Major funding was provided by the Environmental and Natural Resources Trust Fund.The project area consists of 13 counties in east-central Minnesota including: Anoka, Carver, Chisago, Dakota, Goodhue, Hennepin, Isanti, Ramsey, Rice, Scott, Sherburne, Washington, and Wright Counties. The updated wetland inventory area included complete coverage for all USGS quarter quadrangles that intersect any of these counties (about 7,150 square miles). The NWI classification process for east-central Minnesota consisted of three basic steps: 1) creation of image segments (polygons), 2) RandomForest classification of the segments, and 3) photo-interpretation of the classified image segments. The updated NWI also contains a Simplified Plant Community Classification and a Simplified Hydrogemorphic Classification. Quality assurance of the data included a 100% visual inspection, automated checks for attribute validity and topologic consistency, as well as a formal accuracy assessment based on an independent field verified data set. Further details on the methods employed can be found in the technical procedures document for this project (provide URL). The updated NWI data are primarily based on aerial imagery acquired in 2010 and 2011 as well as other modern ancillary data. This data is intended to replace the original NWI data which was based on imagery acquired in the early 1980s. NWI data support effective wetland management, protection, and restoration. The data provide a baseline for assessing the effectiveness of wetland policies and management actions. These data are used at all levels of government, as well as by private industry and non-profit organizations for wetland regulation and management, land use and conservation planning, environmental impact assessment, and natural resource inventories. Link to Attribute Table Information: http://gis.hennepin.us/OpenData/Metadata/Wetland%20Inventory.pdf Data updated: Fall 2014Use Limitations: This data (i) is furnished "AS IS" with no representation as to completeness or accuracy; (ii) is furnished with no warranty of any kind; and (iii) is not suitable for legal, engineering or surveying purposes. Hennepin County shall not be liable for any damage, injury or loss resulting from this data. General questions about this data set, including errors, omissions, corrections and/or updates should be directed to the Hennepin County Department of Environment & Energy (612-348-3777).

Dataset Attributes

  • OBJECTID
    Number
  • WETLAND_ID
    Text
    {"value"=>"D-119-23-34-018", "count"=>164} (), {"value"=>"D-118-24-35-003", "count"=>106} (), {"value"=>"D-119-22-08-004", "count"=>105} (), {"value"=>"D-119-24-36-002", "count"=>89} (), {"value"=>"D-118-24-29-005", "count"=>85} (), {"value"=>"E-117-24-32-003", "count"=>74} (), {"value"=>"D-119-23-02-008", "count"=>70} (), {"value"=>"D-118-23-28-004", "count"=>66} (), {"value"=>"D-117-24-05-001", "count"=>65} (), {"value"=>"D-118-23-11-011", "count"=>62} ()
  • SITE
    Text
    {"value"=>"D1", "count"=>916} (), {"value"=>"D4", "count"=>802} (), {"value"=>"D2", "count"=>781} (), {"value"=>"D3", "count"=>775} (), {"value"=>"D6", "count"=>671} (), {"value"=>"D5", "count"=>666} (), {"value"=>"E1", "count"=>645} (), {"value"=>"D7", "count"=>629} (), {"value"=>"D8", "count"=>620} (), {"value"=>"D13", "count"=>606} ()
  • TYPE
    Text
    {"value"=>"AWET", "count"=>11449} (), {"value"=>"RWET", "count"=>11220} (), {"value"=>"MWET", "count"=>6} (), {"value"=>"NWET", "count"=>1} ()
  • LEGEND
    Text
    {"value"=>"Probable Wetland - NWI", "count"=>44734} (), {"value"=>"Potential Wetland - HCWI", "count"=>11841} (), {"value"=>"Probable Wetland - HCWI", "count"=>11478} ()
  • PERIMETER
    Number
    54.34967626 to 1147816.5877017
  • ACRES
    Number
    0.00265988 to 2351.3961412
  • HECTARES
    Number
    0.00107641 to 951.3605125
  • ATTRIBUTE
    Text
    {"value"=>"PEM1A", "count"=>9705} (), {"value"=>"PEM1C", "count"=>8683} (), {"value"=>"PUBGx", "count"=>5351} (), {"value"=>"PFO1A", "count"=>3847} (), {"value"=>"PABG", "count"=>2559} (), {"value"=>"PUBG", "count"=>2111} (), {"value"=>"PEM1F", "count"=>1779} (), {"value"=>"PABGx", "count"=>1771} (), {"value"=>"PEM1Ad", "count"=>1649} (), {"value"=>"PEM1Af", "count"=>940} ()
  • HGM_CODE
    Text
    {"value"=>"TEPDIS", "count"=>11865} (), {"value"=>"TEFLIS", "count"=>8680} (), {"value"=>"TEBAIS", "count"=>5330} (), {"value"=>"TESLIS", "count"=>4132} (), {"value"=>"TEFRBI", "count"=>3010} (), {"value"=>"LEFRBI", "count"=>1871} (), {"value"=>"LRFPIS", "count"=>1607} (), {"value"=>"LEFLBI", "count"=>1309} (), {"value"=>"LRFPTH", "count"=>939} (), {"value"=>"TEFLTH", "count"=>824} ()
  • WETLAND_TY
    Text
    {"value"=>"Freshwater Emergent Wetland", "count"=>24239} (), {"value"=>"Freshwater Pond", "count"=>13585} (), {"value"=>"Freshwater Forested/Shrub Wetland", "count"=>6662} (), {"value"=>"Riverine", "count"=>248} ()
  • SPCC
    Text
    {"value"=>"Seasonally Flooded Basin", "count"=>12546} (), {"value"=>"Shallow Marsh", "count"=>11507} (), {"value"=>"Shallow Open Water Community", "count"=>8684} (), {"value"=>"Deep Marsh", "count"=>4846} (), {"value"=>"Hardwood Wetland", "count"=>4346} (), {"value"=>"Shrub Wetland", "count"=>1175} (), {"value"=>"Hardwood Wetland/Seasonally Flooded Basin", "count"=>437} (), {"value"=>"Shrub Wetland/Shallow Marsh", "count"=>276} (), {"value"=>"Non-Vegetated Aquatic Community", "count"=>248} (), {"value"=>"Shrub Wetland/Seasonally Flooded Basin", "count"=>219} ()
  • Landscape
    Text
    {"value"=>"Terrene", "count"=>37999} (), {"value"=>"Lentic", "count"=>4621} (), {"value"=>"Lotic River", "count"=>1458} (), {"value"=>"Lotic Stream", "count"=>656} ()
  • Landform
    Text
    {"value"=>"Pond", "count"=>13581} (), {"value"=>"Flat", "count"=>11761} (), {"value"=>"Basin", "count"=>6111} (), {"value"=>"Fringe", "count"=>5071} (), {"value"=>"Slope", "count"=>4572} (), {"value"=>"Floodplain", "count"=>2916} (), {"value"=>"Island", "count"=>474} (), {"value"=>"River", "count"=>248} ()
  • WaterFlow
    Text
    {"value"=>"Isolated", "count"=>31795} (), {"value"=>"Bidirectional-Nontidal", "count"=>7335} (), {"value"=>"Throughflow", "count"=>4521} (), {"value"=>"Outflow", "count"=>1037} (), {"value"=>"Inflow", "count"=>46} ()
  • HGM_NAME
    Text
    {"value"=>"Terrene Pond Isolated", "count"=>11865} (), {"value"=>"Terrene Flat Isolated", "count"=>8680} (), {"value"=>"Terrene Basin Isolated", "count"=>5330} (), {"value"=>"Terrene Slope Isolated", "count"=>4132} (), {"value"=>"Terrene Fringe Bidirectional-Nontidal", "count"=>3010} (), {"value"=>"Lentic Fringe Bidirectional-Nontidal", "count"=>1871} (), {"value"=>"Lotic River Floodplain Isolated", "count"=>1607} (), {"value"=>"Lentic Flat Bidirectional-Nontidal", "count"=>1309} (), {"value"=>"Lotic River Floodplain Throughflow", "count"=>939} (), {"value"=>"Terrene Flat Throughflow", "count"=>824} ()
  • Cow_Class1
    Text
    {"value"=>"EM", "count"=>24239} (), {"value"=>"UB", "count"=>8948} (), {"value"=>"FO", "count"=>4974} (), {"value"=>"AB", "count"=>4847} (), {"value"=>"SS", "count"=>1688} (), {"value"=>"US", "count"=>38} ()
  • Circ39_Cla
    Number
    0 to 90
  • LL_Class
    Text
    {"value"=>"Terrene Pond", "count"=>12543} (), {"value"=>"Terrene Flat", "count"=>9946} (), {"value"=>"Terrene Basin", "count"=>6111} (), {"value"=>"Terrene Slope", "count"=>4572} (), {"value"=>"Terrene Fringe", "count"=>3010} (), {"value"=>"Lentic Fringe", "count"=>1871} (), {"value"=>"Lentic Flat", "count"=>1670} (), {"value"=>"Terrene Floodplain", "count"=>1620} (), {"value"=>"Lotic River Floodplain", "count"=>939} (), {"value"=>"Lentic Pond", "count"=>839} ()
  • INVENTORY
    Text
    {"value"=>"NWI", "count"=>44734} (), {"value"=>"HCWI", "count"=>23303} ()
  • Shape
    Number
  • Shape.STArea()
    Number
  • Shape.STLength()
    Number

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  • By on September 14, 2015
  • Updated 3 days ago

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