Metadata: High Resolution Elevation Model (DEM)

High Resolution Elevation Model (DEM)

This page last updated: 2010-07-26 15:25:29.0
Metadata created using Minnesota Geographic Metadata Guidelines

Metadata Summary

Originator	Minnesota DNR - MIS Bureau
Abstract	This dataset contains high resolution elevation data derived from LiDAR Mass points. The cell size of this dataset is 3 meters. The elevation values are in meters, expressed as real (floating point) numbers. The horizontal accuracy of this data is < 1 meter and the vertical accuracy of this data is < 18 cm.
Use Tips	Important: The cell values are floating point. If converting from ArcASCII format to other formats, be sure to specify the source data contains floating point values. The data is very voluminous and will be required to be pieced together for large areas. Be aware that mosaicing of gridded elevation data routinely results in nodata values at the seams of the individual grids, you may need to run a majority filter or similar windowing process to fill in the no-data cells with appropriate values. In ArcGIS for example, the command in spatial analyst would be: con(isnull([DEM]),focalmean([DEM], rectangle, 3, 3, DATA),[DEM]) Where - DEM is the name of your DEM and the smoothing is done within a 3x3 window if the cell being examined is null.
Browse Graphic	View a sample of the data.
Time Period of Content Date	2006
Currentness Reference
Access Constraints	none
Use Constraints	none
Distributor Organization	DNR-MIS
Ordering Instructions	See Online Linkage or Distribution Contact
Online Linkage	http://deli.dnr.state.mn.us

Full Metadata
High Resolution Elevation Model (DEM)
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	Minnesota DNR - MIS Bureau
Title	High Resolution Elevation Model (DEM)
Abstract	This dataset contains high resolution elevation data derived from LiDAR Mass points. The cell size of this dataset is 3 meters. The elevation values are in meters, expressed as real (floating point) numbers. The horizontal accuracy of this data is < 1 meter and the vertical accuracy of this data is < 18 cm.
Use Tips	Important: The cell values are floating point. If converting from ArcASCII format to other formats, be sure to specify the source data contains floating point values. The data is very voluminous and will be required to be pieced together for large areas. Be aware that mosaicing of gridded elevation data routinely results in nodata values at the seams of the individual grids, you may need to run a majority filter or similar windowing process to fill in the no-data cells with appropriate values. In ArcGIS for example, the command in spatial analyst would be: con(isnull([DEM]),focalmean([DEM], rectangle, 3, 3, DATA),[DEM]) Where - DEM is the name of your DEM and the smoothing is done within a 3x3 window if the cell being examined is null.
Purpose	This data set is suitable for the development of hydraulic/hydrologic model development, and for assessing environmental impacts. Typical uses for the data include: FEMA Flood Plain Map Modernization, DFIRM map updates, Watershed and other hydrologic studies per FEMA specifications. Flood hazard mitigation, Dam safety analysis, engineering pre-design investigations, wetland restoration.
Time Period of Content Date	2006
Currentness Reference
Progress	Complete
Maintenance and Update Frequency	None Planned
Spatial Extent of Data	Lake of the Woods, Kittson, Roseau, Marshall, Beltrami, Polk, Pennington, Clearwater, Red Lake, Norman, Mahnomen, Hubbard, Clay, Becker, Wadena, Otter Tail, Wilkin, Todd
Bounding Coordinates	-97.35 -95.02 49.31 46.13
Place Keywords	Red river Valley, Marsh Creek, Wild Rice River, Mahnomen County, Clay County, Norman County, White Earth Indian Reservation, Minnesota, North Dakota, Seven Mile Creek, Pine County, State of Minnesota
Theme Keywords	Elevation, High Resolution, Grid, DEM
Theme Keyword Thesaurus	None
Access Constraints	none
Use Constraints	none
Contact Person Information	Tim Loesch, GIS Manager DNR-MIS 500 Lafayette Road, Box 11 St. Paul, MN 55155-4011 Phone: 651-259-5475 FAX: (651) 297-4946 E-mail:
Browse Graphic	View a sample of the data.
Browse Graphic File Description
Associated Data Sets

Section 2	Data Quality Information	Top of full metadata	Top of page
Attribute Accuracy
Logical Consistency	Not Applicable
Completeness
Horizontal Positional Accuracy	Source layer elev_dem03ra4: < 1 meter and validated by high accuracy survey points by MnDOT and other sources.
Vertical Positional Accuracy	Source layer elev_dem03ra4: The vertical accuracy of these data are <= 18 cm RMSE and meet the FEMA requirements for floodplain mapping.
Lineage
Source Scale Denominator	Source layer elev_dem03ra4: 4000

Section 3	Spatial Data Organization Information	Top of full metadata	Top of page
Native Data Set Environment	Arc/Info Grid
Geographic Reference for Tabular Data
Spatial Object Type	raster
Vendor Specific Object Types	grid
Tiling Scheme	qq024k

Section 4	Spatial Reference Information	Top of full metadata	Top of page
Horizontal Coordinate Scheme	UTM
Ellipsoid	GRS1980
Horizontal Datum	NAD83
Horizontal Units	meters
Distance Resolution
Altitude Datum	NGVD88
Altitude Units	meters
Depth Datum	NGVD88
Depth Units	meters
Cell Width	3
Cell Height	3
Latitude Resolution
Longitude Resolution
UTM Zone Number	15
SPCS Zone Identifier
County Coordinate Zone Identifier
Coordinate Offsets or Adjustments	Not Applicable
Map Projection Name	Transverse Mercator
Map Projection Parameters	Not Applicable
Other Coordinate System's Definition	Not Applicable

Section 5	Entity and Attribute Information	Top of full metadata	Top of page
Entity and Attribute Overview	Data Elements for Attribute Table ELEV_DEM03PRA4: VALUE: Elevation in feet.
Entity and Attribute Detailed Citation

Section 6	Distribution Information	Top of full metadata	Top of page
Publisher	Minnesota DNR - MIS Bureau
Publication Date	2008-01-01 00:00:00.0
Contact Person Information	Tim Loesch GIS Manager DNR-MIS 500 Lafayette Road, Box 11 St. Paul, MN 55155-4011 Phone: 651-259-5475 FAX: (651) 297-4946 E-mail:
Distributor's Data Set Identifier	elev_dem03ra4
Distribution Liability	The Minnesota Department of Natural Resources makes no representation or warranties, express or implied, with respect to the reuse of data provided herewith, regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, or reliability of this data for any purpose. The user accepts the data 'as is', and assumes all risks associated with its use. By accepting this data, the user agrees not to transmit this data or provide access to it or any part of it to another party unless the user shall include with the data a copy of this disclaimer. The Minnesota Department of Natural Resources assumes no responsibility for actual or consequential damage incurred as a result of any user's reliance on this data.
Transfer Format Name	Arc/Info Grid
Transfer Format Version Number	9.2
Transfer Size	1024
Ordering Instructions	See Online Linkage or Distribution Contact
Online Linkage	http://deli.dnr.state.mn.us

Section 7	Metadata Reference Information	Top of full metadata	Top of page
Metadata Date	2010-07-26 15:25:29.0
Contact Person Information	Tim Loesch, GIS Manager DNR-MIS 500 Lafayette Road, Box 11 St. Paul, MN 55155-4011 Phone: 651-259-5475 FAX: (651) 297-4946 E-mail:
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: 2010-07-26 15:25:29.0