Wetland and surface water polygon data mapped using LiDAR based sources and high-resolution leaf on/off imagery. Mapped to meet or exceed National Wetland Inventory mapping standards for limited parts of Wisconsin. Data mapped after 2018. Visible below 1:95,000.Funding is provided by the Wisconsin Coastal Management Program, the National Oceanic and Atmospheric Administration, Office for Coastal Management under the Coastal Zone Management Act, Grant #NA19NOS419008, and the USDA Forest Service, Chequamegon-Nicolet National Forest through both the Good Neighbor Authority program in partnership with WDNR Forestry Division and internal appropriated funding. Portions of wetland mapping provided by the Great Lakes Indian Fish and Wildlife Commission in cooperation with the University of Wisconsin - Madison Department of Forestry and Wildlife Ecology and Department of Planning and Landscape Architecture.This layer should be used in conjunction with the following layers:

Wisconsin Wetland Inventory Polygon Layer (stereo-pair mapping)Wisconsin Wetland Inventory Filled/Drained Polygon Layer (stereo-pair mapping)Wisconsin Wetland Inventory Filled/Drained Point Layer (stereo-pair mapping)Wisconsin Wetland Inventory Point Layer (stereo-pair mapping)

For more information on 2013 FGDC Classification of Wetlands and Deepwater Habitats of the United States visit: https://www.fgdc.gov/standards/projects/wetlands/nwcs-2013For more information on Wisconsin DNR Wetland Mapping visit: https://dnr.wisconsin.gov/topic/Wetlands/inventory.htmlFor mapping methodology, visit: https://dnr.wisconsin.gov/sites/default/files/topic/Wetlands/WWI_SOP.pdf

Original Wisconsin Wetland Inventory maps were created using stereo-pair, 9”x9”, B/W (NIR) aerial photography flown at a scale of 1:20000 (1in=1667ft). Each photo covered four Public Land Survey System Sections with each section being approximately 1 square mile. Wetland delineations were drafted onto the photos using stereoscopes. The photos were scanned and the wetland information digitized into a GIS. Data mapped between 1988-2015. Visible below 1:95,000.Funded by the Wisconsin Coastal Management Program and the National Oceanic and Atmospheric Administration, Office for Coastal Management under the Coastal Zone Management Act, Grant #NA19NOS419008.This layer is too large to download statewide from the Open Data site. It is recommended that users download a filtered version of it by zooming into an area of interest on the map interface. If the data are needed statewide, the full file geodatabase is available for download at https://www.arcgis.com/home/item.html?id=200c06fc04074ef7ae24c0b74737b187

This layer should be used in conjunction with the following layers to provide complete coverage:Wisconsin Wetland Inventory NWI Polygon Layer (LiDAR based mapping)Wisconsin Wetland Inventory Filled/Drained Polygon Layer (stereo-pair mapping)Wisconsin Wetland Inventory Point Layer (stereo-pair mapping)Wisconsin Wetland Inventory Filled/Drained Point Layer (stereo-pair mapping)

For more information on Wisconsin DNR Wetland Mapping visit: https://dnr.wisconsin.gov/topic/Wetlands/inventory.html

For the Wisconsin Wetland Classification System used in the stereo-pair dataset visit: https://dnr.wisconsin.gov/sites/default/files/topic/Wetlands/WWI_Classification.pdf

This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The Maryland Department of Natural resources began updating the National Wetlands Inventory (NWI) mapping of wetlands in Maryland in the early 1990s. This database lists the 3.75' x 3.75' USGS quadrangles for which 'DNR Wetlands' have been mapped. It identifies the date of source photography used to map wetlands - and the status of mapping effort. This database also gives the five-letter abbreviation used for naming 'DNR_Wetlands' files. In most cases - the first five characters are the first 'five characters' of the 'USGS 7.5' Quad Name.' When completed - the series will provide coverage for the entire State of Maryland. Last Updated: Feature Service Layer Link: https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_Wetlands/MapServer ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively "the Data") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

National Wetland Inventory (NWI) data for Minnesota provide information on the location, extent, and type of Minnesota wetlands. Natural resource managers use NWI data to improve the management, protection, and restoration of wetlands. Wetlands provide many ecological benefits including habitat for fish and wildlife, reducing floods, recharging, improving water quality, and supporting recreation.

These data were updated through a decade-long, multi-agency collaborative effort under leadership of the Minnesota Department of Natural Resources (MNDNR). Major funding was provided by the Environmental and Natural Resources Trust Fund.

This is the first statewide update of the NWI for Minnesota since the original inventory in the mid-1980s. The work was completed in phases by dividing the state into five project areas. Those project areas have all been edgematched into a final seamless statewide dataset.

Ducks Unlimited (Ann Arbor, MI) and St. Mary’s University Geospatial Services (Winona, MN) conducted the wetland mapping and classification under contract to the MNDNR. The Remote Sensing and Geospatial Analysis Laboratory at the University of Minnesota provided support for methods development and field validation. The DNR Resource Assessment Office provided additional support for data processing, field checking, and quality control review.

The updated NWI data delineate and classify wetlands according to the system developed by Cowardin et al. (1979), which is consistent with the original NWI. The updated data also contain a simplified plant community classification (SPCC) and a simplified hydrogeomorphic (HGM) classification. Quality assurance of the data included 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 located on the project website (http://www.dnr.state.mn.us/eco/wetlands/nwi_proj.html ).

DOWNLOAD NOTE: NWI data are only provided in either ESRI File Geodatabase or OGC GeoPackage formats. A Shapefile is not available because the size of the NWI dataset exceeds the limit for that format. If you are unable to use the File Geodatabase or GeoPackage, you can view data through Wetland Finder, an interactive mapping application on the DNR’s website (https://arcgis.dnr.state.mn.us/ewr/wetlandfinder ).

SYMBOLOGY NOTE: The ESRI File Geodatabase download includes four layer files that symbolize the data using four different wetland classification systems. The symbology layer files for the Cowardin class and the simplified HGM class are grouped into a smaller number of classes than the full elaborated classifications. Detail is available in the Minnesota Wetland Inventory User Guide and Summary Statistics report (https://files.dnr.state.mn.us/eco/wetlands/nwi-user-guide.pdf ). The layer files for these data have been set up to restrict drawing of the data when zoomed out beyond 1:250,000 scale. This is, in part, to prevent problems with slow performance with this large dataset.

Original Wisconsin Wetland Inventory maps were created using stereo-pair, 9”x9”, B/W (NIR) aerial photography flown at a scale of 1:20000 (1in=1667ft). Each photo covered four Public Land Survey System Sections with each section being approximately 1 square mile. Wetland delineations were drafted onto the photos using stereoscopes. The photos were scanned and the wetland information digitized into a GIS. Data mapped between 1988-2016. Visible below 1:95,000.Funded by the Wisconsin Coastal Management Program and the National Oceanic and Atmospheric Administration, Office for Coastal Management under the Coastal Zone Management Act, Grant #NA19NOS419008.

This layer should be used in conjunction with the following layers to get full coverage:

Wisconsin Wetland Inventory NWI Polygon Layer (LiDAR based mapping)Wisconsin Wetland Inventory Polygon Layer (stereo-pair mapping)Wisconsin Wetland Inventory Filled/Drained Point Layer (stereo-pair mapping)Wisconsin Wetland Inventory Point Layer (stereo-pair mapping)

For more information on Wisconsin DNR Wetland Mapping visit: https://dnr.wisconsin.gov/topic/Wetlands/inventory.html

For the Wisconsin Wetland Classification System used in the stereo-pair dataset visit: https://dnr.wisconsin.gov/sites/default/files/topic/Wetlands/WWI_Classification.pdf

The principal focus of the wetland inventory is to produce wetland maps that are graphic representations of the type, size and location of wetlands in Wisconsin. Currently, there are two different datasets that have been created using different mapping methods and technologies.

The majority of the state was mapped using traditional stereo-pair, black-and-white, infrared photography. Within this context, the objective was to provide reconnaissance level information on the location, type, size of these habitats such that they are accurate at the nominal scale of the 1:20,000 (1 inch = 1667 feet) base map.

LiDAR Technology

LiDAR has advanced the ability to see and map wetland and surface water features.

New wetland mapping is underway in areas across the state at a nominal scale of 1:2000 (1 inch = 166.7 feet). The data are being mapped according to the National Wetland Inventory standards using new methods. Please see the WWI SOP for more information.

See LiDAR based status map for more information.

Data

The download contains both the older, high altitude, stereo-photo based mapping as well as the newer LiDAR based mapping. Any older WWI data within a new project area boundary have been removed.

The DNR recognizes the limitations of using remotely sensed information as the primary data source. They are to be used as a guide for planning purposes.

There is no attempt, in either the design or products of this inventory, to define the limits of jurisdiction of any federal, state, or local government or to establish the geographical scope of the regulatory programs of government agencies. Anyone intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate federal, state, or local agencies concerning specified agency regulatory programs and jurisdictions that may affect such activities. The most accurate method of determining the legal extent of a wetland for federal or state regulations is a field delineation of the wetland boundary by a professional trained in wetland delineation techniques.

See https://dnr.wi.gov/topic/wetlands/inventory.html for more information on Wisconsin Wetland Inventory mapping.

Please contact Calvin Lawrence, GIS Specialist in the WDNR Waterway and Wetlands Section, at Calvin.Lawrence@wisconsin.gov.

This data download is intended to provide information on Iowa's wetlands. In particular, data recorded in the National Wetland Inventory. This data was mapped from the 2002 CIR Aerial Photography.

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 mile). 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

Use 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).

© Hennepin County Department of Environment & Energy, Minnesota Department of Natural Resources, MN Legislative-Citizen Commission on Minnesota Resources (LCCMR), US Fish & Wildlife Service, Board of Water and Soil Resources This layer is a component of Datasets for Hennepin County AGOL and Hennepin County Open Data..

Indiana Wetlands from the USFWS NWI as of October 6, 2022 at https://www.fws.gov/node/264847

The National Wetland Inventory (NWI) data for Minnesota are being updated through a multi-agency collaborative effort under leadership of the Minnesota Department of Natural Resources (MNDNR). The update is being conducted in geographic phases with data released for each region as it is finalized. This metadata record covers the first three geographic regions: northeast, east-central, and southern Minnesota. Major funding was provided by the Environmental and Natural Resources Trust Fund. The updated NWI classify wetlands according to the system developed by Cowardin et al. (1979). The data also contains a simplified plant community classification (SPCC) and a simplified hydrogeomorphic (HGM) classification. Quality assurance of the data included 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 located on the project website (http://www.dnr.state.mn.us/eco/wetlands/nwi_proj.html ). The updated NWI data are primarily based on spring aerial imagery acquired in 2011 and LiDAR elevation data as well as other modern ancillary data. These data are intended to replace the original 1980s NWI data. 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.

EAST-CENTRAL: Operational support for wetland mapping and classification was provided by Ducks Unlimited (DU) and support for methods development and field validation were provided by the Remote Sensing and Geospatial Analysis Laboratory at the University of Minnesota. The DNR Resource Assessment Office provided additional support data processing, field checking, and quality control review. The east-central project area consists of 13 counties 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 mile).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/editing of the classified image segments.

NORTHEAST: Operational support for wetland mapping and classification was provided by Ducks Unlimited (DU) and support for methods development and field validation were provided by the Remote Sensing and Geospatial Analysis Laboratory at the University of Minnesota. The DNR Resource Assessment Office provided additional support data processing, field checking, and quality control review. The project area consists of 5 counties in northeast Minnesota including: Cook, Koochiching, Lake, St. Louis, and a portion of Carlton Counties. The project encompasses 1,097 USGS quarter quads covering an area of 14,330 square miles (17% of the state). The NWI classification process for northeast 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. Please note that a portion of Koochiching County was completed as a separate pilot project. Those data are not yet included in the greater northeast regional product and will be incorporated after their validation is complete.

SOUTHERN: Operational support for wetland mapping and classification was provided by Geospatial Services of St. Mary's University of Minnesota (SMUMN) and support for methods development and field validation were provided by the Remote Sensing and Geospatial Analysis Laboratory at the University of Minnesota. The MNDNR Resource Assessment Office provided additional support data processing, field checking, and quality control review. Major funding was provided by the Environmental and Natural Resources Trust Fund. The project area consists of 36 counties in southern Minnesota including: Big Stone, Blue Earth, Brown, Chippewa, Cottonwood, Dodge, Faribault, Fillmore, Freeborn, Houston, Jackson, Kandiyohi, Lac qui Parle, Le Sueur, Lincoln, Lyon, Martin, McLeod, Meeker, Mower, Murray, Nicollet, Nobles, Olmstead, Pipestone, Redwood, Renville, Rock, Sibley, Steele, Swift, Wabasha, Waseca, Watonwan, Winona, and Yellow Medicine Counties. The project encompasses 1,787 USGS quarter quads covering an area of 23,900 square miles (28% of the state). The NWI classification process for southern Minnesota relied on visual image interpretation and other geospatial techniques to identify and classify wetlands using remote sensing data.

NOTE: The layer files for this data have been set up to restrict drawing of the data when zoomed out beyond 1:100,000 scale for the east-central region and when zoomed out beyond 1:250,000 scale for the northeast and southern regions. This is, in part, to prevent problems with slow performance with this large dataset. However, the data have also been compressed to speed the drawing performance and this results in a terminal system instability in ArcMap version 10.2 when the east-central data are viewed zoomed out beyond about 1:100,000 scale (1:60,000 scale for the Cowardin symbolized layer). This does not affect the more recent versions of ArcMap such as ArcMap 10.2.2. It also does not affect uncompressed versions of the data.

description: Wetlands & Deepwater Habitats dataset current as of 2005. Digitized WDNR Wetland mapping produced by the county..; abstract: Wetlands & Deepwater Habitats dataset current as of 2005. Digitized WDNR Wetland mapping produced by the county..

Click to downloadClick for metadataService URL: https://gis.dnr.wa.gov/site2/rest/services/Public_Forest_Practices/WADNR_PUBLIC_FP_Water_Type/MapServer/4For large areas, like Washington State, download as a file geodatabase. Large data sets like this one, for the State of Washington, may exceed the limits for downloading as shape files, excel files, or KML files. For areas less than a county, you may use the map to zoom to your area and download as shape file, excel or KML, if that format is desired.The DNR Forest Practices Wetlands Geographic Information System (GIS) Layer is based on the National Wetlands Inventory (NWI). In cooperation with the Washington State Department of Ecology, DNR Forest Practices developed a systematic reclassification of the original USFWS wetlands codes into WAC 222-16-035 types. The reclassification was done in 1995 according to the Forest Practice Rules in place at the time. The WAC's for defining wetlands are 222-16-035 and 222-16-050.The DNR Forest Practices Wetlands Geographic Information System (GIS) Layer is based on the National Wetlands Inventory (NWI). In cooperation with the Washington State Department of Ecology, DNR Forest Practices developed a systematic reclassification of the original USFWS wetlands codes into WAC 222-16-035 types. The reclassification was done in 1995 according to the Forest Practice Rules in place at the time. The WAC's for defining wetlands are 222-16-035 and 222-16-050.It is intended that these data be only a first step in determining whether or not wetland issues have been or need to be addressed in an area. The DNR Forest Practices Division and the Department of Ecology strongly supports the additional use of hydric soils (from the GIS soils layer) to add weight to the call of 'wetland'. Reports from the Department of Ecology indicate that these data may substantially underestimate the extent of forested wetlands. Various studies show the NWI data is 25-80% accurate in forested areas. Most of these data were collected from stereopaired aerial photos at a scale of 1:58,000. The stated accuracy is that of a 1:24,000 map, or plus or minus 40 feet. In addition, some parts of the state have data that are 30 years old and only a small percentage have been field checked. Thus, for regulatory purposes, the user should not rely solely on these data. On-the-ground checking must accompany any regulatory call based on these data.The reclassification is based on the USFWS FWS_CODE. The FWS_CODE is a concatenation of three subcomponents: Wetland system, class, and water regime. Forest Practices further divided the components into system, subsystem, class, subclass, water regime, special modifiers, xclass, subxclass, and xsystem. The last three items (xsomething) are for wetland areas which do not easily lend themselves to one class alone. The resulting classification system uses two fields: WLND_CLASS and WLND_TYPE. WLND_CLASS indicates whether the polygon is a forested wetland (F), open water (O), or a vegetated wetland (W). WLND_TYPE, indicates whether the wetland is a type A (1), type B (2), or a generic wetland (3) that doesn't fit the categories for A or B type wetlands. WLND_TYPE = 0 (zero) is used where WLND_CLASS = O (letter "O").

The wetland polygon is classified as F, forested wetland; O, open water; or W, vegetated wetland depending on the following FWS_CODE categories: F O W --------------------------------------------------- Forested Open Vegetated Wetland Water Wetland --------------------------------------------PFO* POW PUB5 E2FO PRB* PML2 PUB1-4 PEM* PAB* L2US5 PUS1-4 L2EM2 PFL* PSS* L1RB* PML1 L1UB*
L1AB* L1OW L2RB* L2UB* L2AB* L2RS* L2US1-4 L2OW

• indicates inclusion of the subcategory (ie. PEM* includes PEM1F, PEM1FB, etc.).

DNR FOREST PRACTICES WETLANDS DATASET ON FPARS Internet Mapping Website: The FPARS Resource Map and Water Type Map display Forested, Type A, Type B, and "other" wetlands. Open water polygons are not displayed on the FPARS Resource Map and Water Type Map in an attempt to minimize clutter. The following code combinations are found in the DNR Forest Practices wetlands dataset:

WLND_CLASS WLND_TYPE wetland polygon classification F 3 Forested wetland as defined in WAC 222-16-035 O 0 *NWI open water (not displayed on FPARS Resource or Water Type Maps) W 1 Type A Wetland as defined in WAC 222-16-035 W 2 Type B Wetland as defined in WAC 222-16-035 W 3 other wetland

• NWI open water polygons are indicated by WLND_CLASS = O and WLND_TYPE = 0. Open water is used in the USFWS and WAC 222-16-035 classification system. These open water polygons are not included in the FPARS Resource Map and Water Type Map views of this dataset in an attempt to minimize clutter on the FPARS maps.

This web mapping service is intended to provide information on Iowa's wetlands. In particular, data recorded in the National Wetland Inventory.

This is a MD iMAP hosted service layer. Find more information at http://imap.maryland.gov. The Maryland Department of Natural resources began updating the National Wetlands Inventory (NWI) mapping of wetlands in Maryland in the early 1990s. This database lists the 3.75' x 3.75' USGS quadrangles for which 'DNR Wetlands' have been mapped. It identifies the date of source photography used to map wetlands - and the status of mapping effort. This database also gives the five-letter abbreviation used for naming 'DNR_Wetlands' files. In most cases - the first five characters are the first 'five characters' of the 'USGS 7.5' Quad Name.' When completed - the series will provide coverage for the entire State of Maryland. Last Updated: Feature Service Layer Link: https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_Wetlands/MapServer ADDITIONAL LICENSE TERMS: The Spatial Data and the information therein (collectively "the Data") is provided "as is" without warranty of any kind either expressed implied or statutory. The user assumes the entire risk as to quality and performance of the Data. No guarantee of accuracy is granted nor is any responsibility for reliance thereon assumed. In no event shall the State of Maryland be liable for direct indirect incidental consequential or special damages of any kind. The State of Maryland does not accept liability for any damages or misrepresentation caused by inaccuracies in the Data or as a result to changes to the Data nor is there responsibility assumed to maintain the Data in any manner or form. The Data can be freely distributed as long as the metadata entry is not modified or deleted. Any data derived from the Data must acknowledge the State of Maryland in the metadata.

This data set was collected to provide wetland information for use in county, city, village, and town planning activities in the respective counties and for regional planning activities in Southeastern Wisconsin. This was clipped from a data set that consists of digital map files containing point and polygon features of wetland information covering Kenosha, Milwaukee, Ozaukee, Racine, Walworth, Washington, and Waukesha Counties. The files were compiled by the Southeastern Wisconsin Regional Planning Commission on behalf of the Wisconsin Department of Natural Resources as part of a cooperative agreement to update the Wisconsin Wetland Inventory in Southeastern Wisconsin. Each file covers one U.S. Public Land Survey System survey township, for a total of 82 files in the data set. The survey township files have also been merged into files covering entire counties. The digital map files were compiled with reference to one-inch-equals-100-feet-scale and one-inch-equals-200-feet-scale orthophotography acquired in the Spring of 2010, and also with reference to land use, vegetation, topographic, and soils information.

The Maryland Department of Natural resources began updating the National Wetlands Inventory (NWI) mapping of wetlands in Maryland in the early 1990s. This database lists the 3.75' x 3.75' USGS quadrangles for which 'DNR Wetlands' have been mapped. It identifies the date of source photography used to map wetlands, and the status of mapping effort. This database also gives the five-letter abbreviation used for naming 'DNR_Wetlands' files. In most cases, the first five characters are the first 'five characters' of the 'USGS 7.5' Quad Name.' When completed, the series will provide coverage for the entire State of Maryland.The Department of Natural Resources makes no warranty, expressed or implied, as to the use or appropriateness of Spatial Data, and there are no warranties of merchantability or fitness for a particular purpose or use. The information contained in Spatial Data is from publicly available sources, but no representation is made as to the accuracy or completeness of Spatial Data. The Department of Natural Resources shall not be subject to liability for human error, error due to software conversion, defect, or failure of machines, or any material used in the connection with the machines, including tapes, disks, CD-ROMs or DVD-ROMs and energy. The Department of Natural Resources shall not be liable for any lost profits, consequential damages, or claims against the Department of Natural Resources by third parties. The liability of the Department of Natural Resources for damage regardless of the form of the action shall not exceed any distribution fees that may have been paid in obtaining Spatial Data.This is a MD iMAP hosted service layer. Find more information at https://imap.maryland.gov.Feature Service Layer Link:https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_Wetlands/MapServer/1**Please note, due to the size of this dataset, you may receive an error message when trying to download the dataset. You can download this dataset directly from MD iMAP Services at: https://mdgeodata.md.gov/imap/rest/services/Hydrology/MD_Wetlands/MapServer/exts/MDiMAPDataDownload/customLayers/1**

Wetland area features mapped as part of the National Wetlands Inventory (NWI). The National Wetlands Inventory is a national program sponsored by the US Fish and Wildlife Service (USFWS). The NWI database was funded jointly between the USFWS and the State. The base data was developed through interpretation of National Aerial Photography Program (NAPP) imagery (approx. 1:50,000 scale, typically color-infrared) in conjunction with limited field verification studies. Ancillary data sources, particularly USGS Quadrangle Maps and soil surveys, were also used in the interpretation process. After interpreting the aerial photographs, delineations were transferred to a 1:24,000 scale orthogonal base, digitized, and coded in conformance to the USFWS classification scheme and structured into a DLG format. The original interpretation/automation effort was performed under contract by GEONIX-MARTEL of St. Petersburg, FL. The data were delivered to LMIC, who converted it into an ARC/INFO format, and performed some additional processing to prepare it for distribution. Librarian data were then appended and converted to ArcGIS File Geodatabase feature classes by DNR Staff (2009).

For the most recent National Wetlends Inventory data for Minnesota, please use https://gisdata.mn.gov/dataset/water-nat-wetlands-inv-2009-2014

To create this raster layer of Minnesota DNR’s original county Public Waters Inventory (PWI) maps, the maps were scanned, their collars removed, and then georectified and mosaiced together into a statewide map. When the collars were removed, the map legends and some labels were removed and there is some overlap of labels at county boundaries. This raster layer shows the general location of the public waters (lakes, wetlands, and watercourses) as mapped on the original PWI maps published in the 1980’s and revised in 1996. The PWI has been further revised since these maps were originally published and a vector GIS layer of the PWI is available on the Minnesota Geospatial Commons at: https://gisdata.mn.gov/dataset/water-mn-public-waters. Public waters are all water basins, wetlands, and watercourses that meet the criteria set forth in Minn. Stat. 103G.005, subd. 15 and subd. 15a. The DNR has regulatory jurisdiction over public waters and the regulatory boundary of a public water is the Ordinary High Water Level (OHWL), as defined in Minn. Stat. 103G.005, subd. 14. Before conducting work in a public water, contact your local DNR area hydrologist for a correct OHWL determination (https://files.dnr.state.mn.us/waters/area_hydros.pdf). Individual original county PWI maps and county PWI lists are available in PDF format at: https://www.dnr.state.mn.us/waters/watermgmt_section/pwi/maps.html.

This data set represents the extent, approximate location and type of wetlands and deepwater habitats in the United States and its Territories. These data delineate the areal extent of wetlands and surface waters as defined by Cowardin et al. (1979). Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and near shore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery. By policy, the Service also excludes certain types of "farmed wetlands" as may be defined by the Food Security Act or that do not coincide with the Cowardin et al. definition. Contact the Service's Regional Wetland Coordinator for additional information on what types of farmed wetlands are included on wetland maps.

Original Wisconsin Wetland Inventory maps were created using stereo-pair, 9”x9”, B/W (NIR) aerial photography flown at a scale of 1:20000 (1in=1667ft). Each photo covered four Public Land Survey System Sections with each section being approximately 1 square mile. Wetland delineations were drafted onto the photos using stereoscopes. Wetland features and ponds that were too small to draft as a polygon were given a point symbol. The photos were scanned and the wetland information digitized into a GIS. Data mapped between 1988-2016. Visible below 1:95,000. Updated mapping in Wisconsin is ongoing and the goal is to replace all point symbols with a boundary.Funded by the Wisconsin Coastal Management Program and the National Oceanic and Atmospheric Administration, Office for Coastal Management under the Coastal Zone Management Act, Grant #NA19NOS419008.This layer is too large to download statewide from the Open Data site. It is recommended that users download a filtered version of it by zooming into an area of interest on the map interface. If the data are needed statewide, the full file geodatabase is available for download at https://www..arcgis.com/home/item.html?id=200c06fc04074ef7ae24c0b74737b187This layer should be used in conjunction with the following layers to get full coverage:Wisconsin Wetland Inventory Polygon Layer (stereo-pair mapping)Wisconsin Wetland Inventory NWI Polygon Layer (LiDAR based mapping)Wisconsin Wetland Inventory Filled/Drained Polygon Layer (stereo-pair mapping)Wisconsin Wetland Inventory Filled/Drained Point Layer (stereo-pair mapping)For more information on Wisconsin DNR Wetland Mapping visit: https://dnr.wisconsin.gov/topic/Wetlands/inventory.html

For the Wisconsin Wetland Classification System used in the stereo-pair dataset visit: https://dnr.wisconsin.gov/sites/default/files/topic/Wetlands/WWI_Classification.pdf