Metro Wetlands and Wet Areas (MMCD)

This page last updated: 05/23/2011
Metadata created using Minnesota Geographic Metadata Guidelines



Metadata Summary

Originator Metropolitan Mosquito Control District
Abstract This layer depicts wetlands and wet areas tracked by the Metropolitan Mosquito Control District (MMCD) as potentially holding water long enough to support mosquito larval development (5 days). It was developed by MMCD for internal use and is not intended to imply jurisdictional wetland boundaries. It generally includes swamps, marshes, roadside ditches, small shallow ponds and other water-holding features down to 0.01 acre in size. It may include vegetated lake margins but does not generally include large bodies of open water.

All features were manually digitized from orthorectified digital aerial photography (for example, statewide FSA), and most have been field checked for approximate location and size at least once in the last 5 years. The actual extent of water will vary seasonally and annually with rainfall. The extent of water shown in this dataset tends to reflect conditions at the time the aerial photos were taken but may be modified based on field experience. Many sites are field checked during the spring, summer and fall, especially those treated frequently (see http://www.mmcd.org web map for access to inspection and treatment data).

Each feature has been assigned a unique number used within MMCD.
Browse Graphic View a sample of the data.
Time Period of Content Date 05/02/2011
Currentness Reference Ground condition (air photos) as of spring 2010, with updates from field checks through April 2011.
Access Constraints None
Use Constraints These features are not jurisdictional wetland boundaries.
Distributor Organization Metropolitan Mosquito Control District
Ordering Instructions This dataset is distributed on the internet by clicking below after 'Online Linkage'. Doing so will tell your browser to download a 'ZIP' file which will contain the following:

- ArcView shape files
- metadata for the dataset (.htm)
- NOTICE.RTF, an important notice about this dataset that can be read by any word processing software.

Additionally, this dataset is available for direct use via one or more map services. More information about what a web mapping service is can be found at http://www.datafinder.org/services/ . The specific map service and layer name for this dataset can be found by clicking the blue or green boxes under the map service column of the DataFinder Catalog at http://www.datafinder.org/catalog/ .
Distribution Liability NOTICE: The Geographic Information System (GIS) Data to which this notice is attached are made available pursuant to the Minnesota Government Data Practices Act (Minnesota Statutes Chapter 13). THE GIS DATA ARE PROVIDED TO YOU AS IS AND WITHOUT ANY WARRANTY AS TO THEIR PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. The GIS Data were developed by the Metropolitan Mosquito Control District for its own internal business purposes. The Metropolitan Mosquito Control District does not represent or warrant that the GIS Data or the data documentation are error-free, complete, current, or accurate. You are responsible for any consequences resulting from your use of the GIS Data or your reliance on the GIS Data. You should consult the data documentation for this particular GIS Data to determine the limitations of the GIS Data and the precision with which the GIS Data may depict distance, direction, location, or other geographic features. If you transmit or provide the GIS Data (or any portion of it) to another user, it is recommended that the GIS Data include a copy of this disclaimer and this metadata.
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will begin the download process (See Ordering Instructions above for details.)


Full Metadata

Metro Wetlands and Wet Areas (MMCD)

Go to Section:
1. Identification Information
2. Data Quality Information
3. Spatial Data Organization Information
4. Spatial Reference Information
5. Entity and Attribute Information
6. Distribution Information
7. Metadata Reference Information

 
Section 1 Identification Information   Top of page
Originator Metropolitan Mosquito Control District
Title Metro Wetlands and Wet Areas (MMCD)
Abstract This layer depicts wetlands and wet areas tracked by the Metropolitan Mosquito Control District (MMCD) as potentially holding water long enough to support mosquito larval development (5 days). It was developed by MMCD for internal use and is not intended to imply jurisdictional wetland boundaries. It generally includes swamps, marshes, roadside ditches, small shallow ponds and other water-holding features down to 0.01 acre in size. It may include vegetated lake margins but does not generally include large bodies of open water.

All features were manually digitized from orthorectified digital aerial photography (for example, statewide FSA), and most have been field checked for approximate location and size at least once in the last 5 years. The actual extent of water will vary seasonally and annually with rainfall. The extent of water shown in this dataset tends to reflect conditions at the time the aerial photos were taken but may be modified based on field experience. Many sites are field checked during the spring, summer and fall, especially those treated frequently (see http://www.mmcd.org web map for access to inspection and treatment data).

Each feature has been assigned a unique number used within MMCD.
Purpose Identifying and tracking areas that potentially hold water long enough to support mosquito larval development (5 days).
Time Period of Content Date 05/02/2011
Currentness Reference Ground condition (air photos) as of spring 2010, with updates from field checks through April 2011.
Progress Complete
Maintenance and Update Frequency Updated annually, with updates usually available by May 1.
Spatial Extent of Data Twin Cities 7 County Metropolitan Area. This includes the counties of Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and Washington in Minnesota.
Bounding Coordinates -94.012
-92.732
45.415
44.471
Place Keywords Twin Cities, Anoka County, Carver County, Dakota County, Hennepin County, Ramsey County, Scott County, Washington County
Theme Keywords Wetlands, water, water features, mosquitoes
Theme Keyword Thesaurus None
Access Constraints None
Use Constraints These features are not jurisdictional wetland boundaries.
Contact Person Information Nancy Read, Technical Services Coordinator
Metropolitan Mosquito Control District
2099 University Ave West
St. Paul, Minnesota 55104
Phone: 651-643-8386
FAX:
E-mail: nancread@mmcd.org
Browse Graphic View a sample of the data.
Browse Graphic File Description Sample map showing MMCD Metro Wetlands and Wet Areas dataset
Associated Data Sets

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy Internal quality checks are run on the format of attribute data; accurateness of field-assigned wetland typing has not been ascertained and current types may vary from those assigned due to weather conditions.
Logical Consistency The data are logically consistent.
Completeness Entire seven county geographic area is covered.
Horizontal Positional Accuracy Boundaries of wet area features were based on digital orthophotos, primarily the 2008-10 FSA (1.0 meter/pixel) and Twin Cities 2010 High Resolution (0.3 meter/pixel). For detailed info on the positional accuracy of these photos see http://www.mngeo.state.mn.us/chouse/metadata/naip08.html and http://www.mngeo.state.mn.us/chouse/wms/wms_image_server_layers.html
Many sites were field checked during 2010, especially those treated frequently (see http://www.mmcd.org web map for access to inspection and treatment data).

The scale at which lines were digitized varied as staff zoomed in and out while heads-up digitizing within MapInfo, however most lines were digitized at an on-screen scale of no higher than 1:3000. For smaller wet areas, 1:1500 was more common.

As a general rule when developing this dataset it was the MMCD's intention to meet or exceed the National Mapping Accuracy Standards at 1:24,000 (within approximately 40 feet of actual location). No testing has been conducted to verify this.
Lineage Water feature boundaries were heads-up digitized from 1.0-0.3 meter digital orthophotos. The scale at which lines were digitized varied as staff zoomed in and out while heads-up digitizing within MapInfo, however most lines were digitized at an on-screen scale of no higher than 1:3000. For smaller wet areas, 1:1500 was more common.

Many open water areas have been removed as these areas do not support mosquito larval development, but the dataset may still include some smaller open water features.
Source Scale Denominator
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment MapInfo 10
Geographic Reference for Tabular Data None
Spatial Object Type Vector
Vendor Specific Object Types
Tiling Scheme One layer for entire metro area
 
Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme UTM
Ellipsoid GRS80
Horizontal Datum NAD83
Horizontal Units Meters
Distance Resolution
UTM Zone Number 15
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview
Sitecode - A unique code for each wetland in the 7-county metro area, 
based on MMCD's County, City, Section and Site codes.

Acres - Area calculated by MapInfo from polygons as drawn.

Type - The first digit of type is based on the Circular 39 wetland
typing system. The digit after the '.' is an MMCD code
referring to the predominant vegetation, as follows:
Type 1 - Temporary water; usually well-drained during much of the
growing season.
1.1 - Open field, usually grass.
1.2 - Woodland pool or Floodplain forest; could produce both spring
and summer mosquitoes
1.3 - Woodland pool, only spring mosquitoes produced
Type 2 - Temporary water; typically dries out at some time during the
year but may stay waterlogged.
2.1 - Reed canary grass, predominantly. No cattail.
2.2 - Sedge meadow, predominantly. No cattail.
2.3 - Assorted aquatic plants (not cattail not predominantly reed
canary grass or sedge)
Type 3 - Temporary water; wet or waterlogged most of year in wet
years, may dry out in midsummer or dry years.
3.1 - Majority reed canary grass and sedge, remainder mostly
cattail
3.2 - Majority cattail, remainder reed canary grass and sedge
Type 4 - Permanent water, usually ca. 3 ft deep
4.1 - Vegetative band mostly canary grass and sedges; perm. open
water area less than area covered by vegetation
4.2 - Vegetative band mostly cattails or broadleaf plants; open
water area less than area covered by vegetation
4.3 - Majority of site is open water; narrow band of cattail,
grass, sedge or other vegetation
4.4 - Majority open water; steep banks, very little emergent
vegetation (ex: golf hazards, 'duck ponds')
Type 5 - ca. 10 ft. deep, may contain game fish
5.1 - Most vegetation grass and sedge, some cattail; open water
area less than area covered by vegetation
5.2 - Mostly cattails and/or broadleafs, some grass or sedge; open
water area less than area covered by vegetation
5.3 - Majority of site is open water; narrow bands of cattail,
grass, sedge or other vegetation
5.4 - Shallow pond or reservoir that does not contain game fish
(including panfish)
Type 6 - Shrub swamp; usually waterlogged during growing season.
6.0 - (only type used)
Type 7 - Wooded swamp
7.0 - Usually tamarack
Type 8 - Bog
8.1 - Poorly drained, wet spongy ground rich in plant residue
8.2 - Floating mat

Some sites that have not been visited recently may not have a type assigned.

MMCD keeps records of estimated % wet when we check these sites. If
there are particular sites you are interested in you can check records
for the last several years using the web map at www.mmcd.org, or contact
MMCD staff for additional information.
Entity and Attribute Detailed Citation None
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Metropolitan Mosquito Control District, Saint Paul, MN
Publication Date 05/23/2011
Contact Person Information Nancy Read
Technical Services Coordinator
Metropolitan Mosquito Control District
2099 University Ave West
St. Paul, Minnesota 55104
Phone: 651-643-8386
FAX:
E-mail: nancread@mmcd.org
Distributor's Data Set Identifier MMCDWetAreas
Transfer Format Name Shapefile
Transfer Format Version Number ArcGIS 8x
Transfer Size 34 MB for zip file.
Ordering Instructions This dataset is distributed on the internet by clicking below after 'Online Linkage'. Doing so will tell your browser to download a 'ZIP' file which will contain the following:

- ArcView shape files
- metadata for the dataset (.htm)
- NOTICE.RTF, an important notice about this dataset that can be read by any word processing software.

Additionally, this dataset is available for direct use via one or more map services. More information about what a web mapping service is can be found at http://www.datafinder.org/services/ . The specific map service and layer name for this dataset can be found by clicking the blue or green boxes under the map service column of the DataFinder Catalog at http://www.datafinder.org/catalog/ .
Distribution Liability NOTICE: The Geographic Information System (GIS) Data to which this notice is attached are made available pursuant to the Minnesota Government Data Practices Act (Minnesota Statutes Chapter 13). THE GIS DATA ARE PROVIDED TO YOU AS IS AND WITHOUT ANY WARRANTY AS TO THEIR PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. The GIS Data were developed by the Metropolitan Mosquito Control District for its own internal business purposes. The Metropolitan Mosquito Control District does not represent or warrant that the GIS Data or the data documentation are error-free, complete, current, or accurate. You are responsible for any consequences resulting from your use of the GIS Data or your reliance on the GIS Data. You should consult the data documentation for this particular GIS Data to determine the limitations of the GIS Data and the precision with which the GIS Data may depict distance, direction, location, or other geographic features. If you transmit or provide the GIS Data (or any portion of it) to another user, it is recommended that the GIS Data include a copy of this disclaimer and this metadata.
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will begin the download process (See Ordering Instructions above for details.)
 
Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 05/23/2011
Contact Person Information Nancy Read, Technical Services Coordinator
Metropolitan Mosquito Control District
2099 University Ave West
St. Paul, Minnesota 55104
Phone: 651-643-8386
FAX:
E-mail: nancread@mmcd.org
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


This page last updated: 05/23/2011