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This page last updated: 04/02/2004
Metadata created using Minnesota Geographic Metadata Guidelines
| Originator | Metropolitan Council | |||
| Abstract | This raster dataset is a digital elevation model of the bedrock surface of the Twin Cities Metropolitan Area. This data is a 30-meter grid interpolated from 50-foot contours of bedrock surface elevation obtained from the Minnesota Geological Survey. | |||
| Browse Graphic | View a sample of the data. | |||
| Time Period of Content Date | 06/01/1996 | |||
| Currentness Reference | 12/2002 - Interpolated from Contours | |||
| Access Constraints | None | |||
| Use Constraints | Credit given to the Minnesota Geological Survey | |||
| 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 | |||
| Title | Bedrock DEM | |||
| Abstract | This raster dataset is a digital elevation model of the bedrock surface of the Twin Cities Metropolitan Area. This data is a 30-meter grid interpolated from 50-foot contours of bedrock surface elevation obtained from the Minnesota Geological Survey. | |||
| Purpose | This dataset was developed to assist with planning efforts including water supply planning and wastewater collection system planning. | |||
| Time Period of Content Date | 06/01/1996 | |||
| Currentness Reference | 12/2002 - Interpolated from Contours | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | None planned | |||
| Spatial Extent of Data | The data cover the seven-county Twin Cities Metropolitan Area | |||
| Bounding Coordinates | -94.0047798 -92.7286997 45.4176828 44.4687857 |
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| Place Keywords | Twin Cities, Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, Washington | |||
| Theme Keywords | bedrock, geology, elevation | |||
| Theme Keyword Thesaurus | None | |||
| Access Constraints | None | |||
| Use Constraints | Credit given to the Minnesota Geological Survey | |||
| Contact Person Information | Steve Kloiber,
Environmental Analyst 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 BedrockDEM layer. | |||
| Associated Data Sets | Bedrock Geology and Structure of the seven-county Twin Cities Metropolitan Area (from MGS) |
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| Section 2 | Data Quality Information | Top of full metadata | Top of page | |
| Attribute Accuracy | There is only one attribute, bedrock surface elevation. The accuracy of this elevation data is unknown, but cannot be assumed to be more accurate than the elevation of the 50-foot elevation contour data from which is was derived. | |||
| Logical Consistency | The data are logically consistent | |||
| Completeness | The data are complete for the seven-county Twin Cities Metropolitan Area. | |||
| Horizontal Positional Accuracy | Unknown, but cannot be assumed to be more accurate than the position of the 50-foot elevation contour data from which is was derived. | |||
| Vertical Positional Accuracy | Unknown, but cannot be assumed to be more accurate than the elevation of the 50-foot elevation contour data from which is was derived. Probably +/- one-half of the contour interval (25 ft). | |||
| Lineage | The elevation data contained in this raster dataset were interpolated from 50-foot bedrock surface elevation contours obtained from the Minnesota Geological Survey using ANUDEM. ANUDEM was developed by M.F. Hutchinson at the Australian National University. This program calculates values on a regular grid of a discretized smooth surface fitted to a large number of irregularly spaced elevation data points and contour lines. The program automatically removes spurious sinks were possible. In some regions, the interpolation overshoots the elevation, particularly in the case of exposed or very shallow bedrock plateaus. These areas were identified by creating a difference grid between the bedrock and surface elevation grids. All areas in the bedrock DEM where the depth to bedrock was found to be less than zero were re-coded to have a bedrock elevation equal to the surface elevation (for example the Mpls. - St. Paul Airport). |
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| Source Scale Denominator | 100000 | |||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | ESRI ArcInfo/ArcView Grid | |||
| Geographic Reference for Tabular Data | None | |||
| Spatial Object Type | Raster | |||
| Vendor Specific Object Types | Cell | |||
| Tiling Scheme | One tile for entire region. | |||
| 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 | 30 | |||
| Altitude Datum | NAVD88 | |||
| Altitude Units | Feet | |||
| Depth Datum | Not applicable | |||
| Cell Width | 30 | |||
| Cell Height | 30 | |||
| UTM Zone Number | 15 | |||
| Section 5 | Entity and Attribute Information | Top of full metadata | Top of page | |
| Entity and Attribute Overview | The only attribute is elevation in feet about mean sea level. |
| Entity and Attribute Detailed Citation | ||||
| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | Metropolitan Council | |||
| Publication Date | 04/08/2003 | |||
| 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 | BedrockDEM | |||
| Transfer Format Name | Arc Grid | |||
| Transfer Format Version Number | ArcGIS 8x | |||
| Transfer Size | 30 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 | 04/02/2004 | |||
| Contact Person Information | Steve Kloiber,
Environmental Analyst Metropolitan Council Environmental Services 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 |
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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: 04/02/2004
