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This page last updated: 10/30/2001
Metadata created using Minnesota Geographic Metadata Guidelines
| Originator | Metropolitan Council, DNR | |||
| Abstract | This dataset is a hydrologically correct 10 meter digital elevation model of the seven county Twin Cities metropolitan area. ''Hydrologically Corrected'' means that the DEM was adjusted to accurately depict surface water drainage, even when the drainage is in underground storm sewers, etc. In some places this DEM will be very different than a normal height-of-land DEM. | |||
| 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 which vary in publication date from 1979 to 1990, and the DNR lakes and stream database, assembled from various sources (MNDOT base map, DLG, DRQ and WMO subsurface drainage data). | |||
| 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: - Grid dataset - metdata for the dataset (.htm) - NOTICE.RTF, an important notice about this dataset that can be read by any word processing software. |
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| 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.) | |||
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 Council, DNR | |||
| Title | Hydrologically Corrected 10 Meter Digital Elevation Model | |||
| Abstract | This dataset is a hydrologically correct 10 meter digital elevation model of the seven county Twin Cities metropolitan area. ''Hydrologically Corrected'' means that the DEM was adjusted to accurately depict surface water drainage, even when the drainage is in underground storm sewers, etc. In some places this DEM will be very different than a normal height-of-land DEM. | |||
| Purpose | To develop a digital elevation model that accurately reflects surface water drainage in the Twin Cities metropolitan area. | |||
| Time Period of Content Date | 1980 | |||
| Currentness Reference | Base information is as current as the publication of its source USGS quadrangle maps which vary in publication date from 1979 to 1990, and the DNR lakes and stream database, assembled from various sources (MNDOT base map, DLG, DRQ and WMO subsurface drainage data). | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | None planned | |||
| 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 | -96.912 -92.521 47.526 44.244 |
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| Place Keywords | Twin Cities, Anoka County, Carver County, Dakota County, Hennepin County, Ramsey County, Scott County, Washington County | |||
| Theme Keywords | elevation, drainage, watershed delineation, topography, DEM, digital elevation model | |||
| Theme Keyword Thesaurus | None | |||
| Access Constraints | None | |||
| Use Constraints | None | |||
| Contact Person Information | Steve Kloiber,
Senior 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 DEM10MHYDROCORRECTED layer. | |||
| Associated Data Sets | 10-foot elevation contours, Metro Streams Network |
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| Section 2 | Data Quality Information | Top of full metadata | Top of page | |
| Attribute Accuracy | This dataset is a grid file with elevation as the only attribute. The accuracy of this attribute is discussed under the topic of vertical position accuracy in this metadata file. | |||
| Logical Consistency | The data are topologically correct and verified | |||
| Completeness | The dataset is complete for the 89 USGS 7.5 minute quadrangles. | |||
| Horizontal Positional Accuracy | Positional accuracy for areas derived from 7.5 minute quads cannot be assumed to exceed National Map Accuracy Standards for 1:24,000 scale maps (+/- 40 feet). | |||
| Vertical Positional Accuracy | Vertical accuracy for areas derived from 7.5 minute quads cannot be assumed to exceed National Map Accuracy Standards for 1:24,000 scale maps with 10-foot elevation contours (+/- 5 feet). | |||
| Lineage | TOPOGRID processing was performed on digital elevation contours to derive the hydrologically correct elevation model MCDEM. DLG derived contours, depression points, lakes, and streams were used as input for the process. Datatype contour (UPLNDLN, item elev1) Tolerances used: 5, Horizontal error 1, Vertical error 1 Margin 1 Enforce on Sink TGSINK Lake TGLAKE Stream TGSTRM Lake surface elevations were calculated as zonal minimums of surface elevations for each lake. The resulting output is in a floating point grid, with units of feet. One DEM (USGS quad 3725) was generated with point elevation data from a level 1 DEM with 30-m cells. Contours and sink inputs were absent for this quad. The following layers were used in or resulted from the processing: TGSTRM, streams input for processing, TGSINK, depression elevation points used as input, no sink depth value defined, TGLAKE, lakes input, UPLNDLN, elevation contours LK_MASK, lake surface elevations MCDEM_CM, integer elevation values in centimeters MCDEM_FT, integer elevation values in feet Regional DEM MCDEM_FT was divided into 9 watershed DEMs: MCDEM1 - Mississippi River, St. Cloud Watershed (Clearwater and Elk River) MCDEM2 - Crow River Watershed MCDEM3 - South Fork Crow River Watershed MCDEM4 - Rum River Watershed MCDEM5 - Mississippi River, Twin Cities Watershed MCDEM6 - Lower Minnesota River Watershed MCDEM7 - Lower St. Croix River Watershed MCDEM8 - Rush-Vermillion River Watershed MCDEM9 - Cannon River Watershed |
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| Source Scale Denominator | 24000 | |||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | ArcInfo Version 8x Grid | |||
| Geographic Reference for Tabular Data | None | |||
| Spatial Object Type | Raster | |||
| Vendor Specific Object Types | Integer grid, 10 meter cell size | |||
| 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 | 10 | |||
| Altitude Datum | NAVD88 | |||
| Altitude Units | Feet | |||
| Depth Datum | Not applicable | |||
| Cell Width | 10 | |||
| Cell Height | 10 | |||
| UTM Zone Number | 15 | |||
| Section 5 | Entity and Attribute Information | Top of full metadata | Top of page | |
| Entity and Attribute Overview | Attributes retain the elevation of the grid cell as derivedfrom the topogrid |
| 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 |
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| Distributor's Data Set Identifier | DEM10MHYDROCORRECTED | |||
| Transfer Format Name | zipped grid dataset | |||
| Transfer Format Version Number | ArcInfo: 8x | |||
| Transfer Size | 45 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: - Grid dataset - metdata for the dataset (.htm) - NOTICE.RTF, an important notice about this dataset that can be read by any word processing software. |
|||
| 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 | 10/30/2001 | |||
| 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 |
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| 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: 10/30/2001
