Metadata: Streams Network - Twin Cities Metro Area

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Streams Network - Twin Cities Metro Area

This page last updated: 01/26/2001
Metadata created using Minnesota Geographic Metadata Guidelines

Metadata Summary

Originator	Metropolitan Council, DNR, Mn/DOT
Abstract	Layer depicts streams captured from USGS 1:24,000, 7.5 minute quadrangle maps, with perennial vs. intermittent classification, and connectivity through lakes, rivers, and small wetland basins. Streams are depicted as a single line. Attributes describe stream type, source of data, and connectivity. Directionality is accurate for all streams in the database with the exception of 40 short (< 500 m) unverified, unconnected streams. The layer covers the 89 USGS 7.5 minute quads in the Twin Cities metropolitan area.
Browse Graphic	View a sample of the data.
Time Period of Content Date	1980
Currentness Reference	Base information is as current as the publication of its source USGS quadrangle maps. Additional information varies in currentness, depending on publication dates of WMO and municipal information.
Access Constraints	None
Use Constraints	None
Distributor Organization	Metropolitan Council
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 Council for its own internal business purposes. The Metropolitan Council 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


Section 1	Identification Information		Top of page
Originator	Metropolitan Council, DNR, Mn/DOT
Title	Streams Network - Twin Cities Metro Area
Abstract	Layer depicts streams captured from USGS 1:24,000, 7.5 minute quadrangle maps, with perennial vs. intermittent classification, and connectivity through lakes, rivers, and small wetland basins. Streams are depicted as a single line. Attributes describe stream type, source of data, and connectivity. Directionality is accurate for all streams in the database with the exception of 40 short (< 500 m) unverified, unconnected streams. The layer covers the 89 USGS 7.5 minute quads in the Twin Cities metropolitan area.
Purpose	To develop a streams layer for the metropolitan area that is topologically connected through lakes and wetlands, allowing stream tracings through such features.
Time Period of Content Date	1980
Currentness Reference	Base information is as current as the publication of its source USGS quadrangle maps. Additional information varies in currentness, depending on publication dates of WMO and municipal information.
Progress	Complete
Maintenance and Update Frequency	Irregular
Spatial Extent of Data	Includes 89 USGS 7.5 minute quadrangles intersecting the minor watersheds intersecting the Twin Cities 7 County Metropolitan Area. This includes the counties of Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and Washington.
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	streams, rivers, ditches, drainage, storm sewers, hydrography, hydrology, water resources
Theme Keyword Thesaurus	None
Access Constraints	None
Use Constraints	None
Contact Person Information	Steve Kloiber, Water Resource Planner Metropolitan Council Environmental Services 390 Robert Street North St. Paul, Minnesota 55101 Phone: 651-602-1056 FAX: 651-602-1130 E-mail: steve.kloiber@metc.state.mn.us
Browse Graphic	View a sample of the data.
Browse Graphic File Description	Sample map showing the stream_net layer.
Associated Data Sets	Mn/DOT Streams, National Wetlands Inventory Lakes and Wetlands, Mn/DNR 24K Streams, Mn/DNR Lakes

Section 2	Data Quality Information	Top of full metadata	Top of page
Attribute Accuracy	unknown
Logical Consistency	The data are topologically correct and verified.
Completeness	The dataset is complete for the 89 USGS 7.5 minute quadrangles. Note that some additional drainage connections may be available from municipalities.
Horizontal Positional Accuracy	Positional accuracy for areas derived from 1:24,000 USGS maps cannot be assumed to exceed National Map Accuracy Standards for 1:24,000 scale maps (+/- 40 feet).
Vertical Positional Accuracy	n/a
Lineage	APRIL 2000 The Streams Network layer was developed by taking the Mn/DOT steams layers from the Mn/DOT Base Maps series (digitized from 1:24,000 USGS quad maps) and connecting stream segments through lakes and wetlands. Breaks in stream network continuity and lake drainage were filled using a variety of data sources. Working in major watershed tiles, DNR lakes and wetlands (of NWI origin) were used to create connector arcs through these features. Further connections were interpreted by referencing 24k USGS Digital Raster Graphics, and, selectively, by analysis of DOQs produced by the Metropolitan Council. Subsurface drainage was added using maps and descriptions from numerous Watershed Management Organization reports and municipalities. To prepare the coverage for further processing, braided streams were removed from the network. The above named source materials were used to determine primary channels when choosing the appropriate arc to represent the stream. Finally, the major watersheds were joined together into one metropolitan area wide coverage. Topology was verified. Many of the original stream arcs did not coincide with lake shores. To ensure the presence of a node at every point where a lake connector and stream feature meet, an IDENTITY was performed with the lakes coverage. Attributes were updated appropriately. Once the network was determined to be complete, a network TRACE was run to verify connectivity and flag those arcs flowing in the wrong direction. Corrections were made so that the resulting stream network has all arcs flowing downhill, and connections are true. The original major watershed extents were clipped to the project area. This area is represented by a 300 meter buffered set of the 89 24k quads that intersect the minor watersheds intersecting the seven county metropolitan area. Many arcs remained isolated from the network. All those over 500 meters long were verified to flow in the right direction. Tolerance values for the coverage were set as follows: Fuzzy: 0.100 Dangle: 10.000 Verified Tic Match: 0.000 Edit: 10.000 Verified Node Snap: 10.000 Verified Weed: 1 Verified Grain: 10 Verified Snap: 3.000 Verified JULY 2000 DNR reviewed the metro streams product and conducted a comprehensive data quality review and editing process, focused primarily on data completeness issues. DNR staff used the 7.5 minute Digital Raster Graphics (DRG's) as the principal reference source during the editing process. DNR 24K Lakes were also used in the editing process. The work was conducted in ARC/INFO Workstation Version 8.02, using ARCEDIT. During the course of the work, numerous stream reaches were added and a variety of edits to existing features were made, including: extending streams, moving streams, deleting small spurious features, and snapping to lake polygon boundaries. DNR staff also tagged those features which are designated trout streams. Very few streams were actually deleted and redigitized during the process. Rather, the process was focused on making the data consistent with other portions of the DNR 24K Streams layer with regards to structure, content, and consistency of representation.
Source Scale Denominator	24000

Section 3	Spatial Data Organization Information	Top of full metadata	Top of page
Native Data Set Environment	ArcInfo Version 7x, UNIX platform
Geographic Reference for Tabular Data	None
Spatial Object Type	Vector
Vendor Specific Object Types	arcs, nodes
Tiling Scheme	One layer for entire 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

This dataset depicts water drainage, detailed to the general type of stream.   
Categories of stream type are described in the Detailed Citation. The streams  
are coded to record what organization created a particular feature, using what  
data source. 
  
STRM_TYPE:  The classification of stream type.  Possible values include: 
   20 - Stream (perennial) 
   21 - Stream (intermittent) 
   22 - Stream (unknown) 
   40 - Drainage ditch (perennial) 
   41 - Drainage ditch (intermittent) 
   42 - Drainage ditch (undifferentiated) 
   60 - Connector (lake) 
   61 - Connector (wetland) 
   62 - Centerline (river) 
   63 - Connector (river) 
   70 - Road culvert 
   71 - Underground storm sewer 
   72 - Pumped force main 
   73 - Drain tile 
   80 - Interpreted arc connector 
   81 - Arbitrary overland flow connector 
 
STRM_LONG:  Description of stream type.  Possible values include: 
   Stream (perennial) 
   Stream (intermittent) 
   Stream (unknown) 
   Drainage ditch (perennial) 
   Drainage ditch (intermittent) 
   Drainage ditch (undifferentiated) 
   Connector (lake) 
   Connector (wetland) 
   Centerline (river) 
   Connector (river) 
   Road culvert 
   Underground storm sewer 
   Pumped force main 
   Drain tile 
   Interpreted arc connector 
   Arbitrary overland flow connector 
    
STRM_SOURC: Source of the stream data.  Possible values include: 
    1 - Captured from original digital Mn/DOT basemap 
    2 - Captured from MPCA/EPA stream cover 
    3 - Captured from other MNDOT basemap using split/copy process 
    4 - Integrated from LGU digital source 
   51 - Manually digitized from USGS quad map 
   52 - Digitized on screen from USGS DRGs 
   53 - Digitized on screen from DOQs 
   54 - Manually digitized from LGU drainage map 
   55 - Interpreted from DRGs 
   56 - Interpreted from DOQs 
  
TROUT_FLAG: Indicates trout stream 
    0 - Not a trout stream or tributary 
    1 - Designated trout stream 
  
STRM_BRK:   Network value assessing connectivity and directionality. 
    0 - Arc break = no 
    1 - Arc break = yes (correct directionality) 
   30 - Arc not used for DEM generation (e.g. aqueducts) 
  
PROD_SRC:   Organization adding the feature 
    1 - St. Cloud State University 
    2 - BRW Inc. 
    3 - Metropolitan Council Watershed Mapping Project 
    4 - MN-DNR Waters Watershed Mapping Project 
    5 - MN-DNR MIS 
    6 - MN-DNR Fisheries 
    7 - USGS - Minnesota 
    8 - Mankato State University 
    9 - MN-DOT 
  
PROD_PER:   The year that the features was added 
  1996 - pilot phase 
  1998 - phase 1 production 
  1999 
  2000 
  2001

Entity and Attribute Detailed Citation	None

Section 6	Distribution Information	Top of full metadata	Top of page
Publisher	Metropolitan Council
Publication Date	Unpublished material
Contact Person Information	Mark Kotz GIS Database Administrator Metropolitan Council 390 Robert Street North St. Paul, Minnesota 55101-1805 Phone: 651-602-1644 FAX: 651-602-1674 E-mail: mark.kotz@metc.state.mn.us
Distributor's Data Set Identifier	StreamsNetwork
Transfer Format Name	Shapefile
Transfer Format Version Number	ArcView: 3
Transfer Size	6 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 Council for its own internal business purposes. The Metropolitan Council 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	01/26/2001
Contact Person Information	Steve Kloiber, Water Resource Planner Metropolitan Council 390 Robert Street North St. Paul, Minnesota 55101-1805 Phone: 651-602-1056 FAX: 651-602-1130 E-mail: steve.kloiber@metc.state.mn.us
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: 01/26/2001