2009 Northeast Minnesota, 50-cm Resolution, Digital Orthorectified Images

This page last updated: 06/29/2010
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator Minnesota Department of Natural Resources, Minnesota Pollution Control Agency, St. Louis County, U.S. Geological Survey, and Keystone Aerial Surveys Inc.
Abstract This dataset contains 4 Band (RGBI) digital orthophoto imagery of Cook, Lake, St. Louis and Carlton counties in northern Minnesota.

The orthophotos are 0.5 meter ground sample distance (GSD) and are in UTM Zone 15, NAD83 (meters). The tiling format of the imagery is based on a 3.75' x 3.75' quarter quadrangle with a 150 meter buffer on all four sides. This dataset includes 969 digital orthophoto quarter quadrangles (DOQQs) in GeoTiff format with an associated world file, and this metadata file. The data is available online as a web mapping service (WMS).

All imagery was collected by Keystone Aerial Surveys Inc with a Vexcel UltraCamX camera from an altitude of approximately 24,000 feet. All imagery was processed by Keystone using the camera manufacturer's software, Inpho's photogrammetry suite and Keystone-created software.

Funding for this data was provided by the Minnesota Natural Heritage Fund, the Minnesota Clean Water Legacy Act, The Environmental and Natural Resources Trust Fund, St. Louis County, the Coastal Zone Management Program, and the National Geospatial Intelligence Agency.
Browse Graphic none available
Time Period of Content Date 05/2009
Currentness Reference Month that the photography was flown.
Access Constraints Unrestricted
Use Constraints Imagery is the property of the State of Minnesota.

Redistribution conditions: In obtaining this data from MnGeo, it is understood that you and/or your organization have the right to use it for any purpose. If you modify it, you are encouraged to apply responsible best practices by documenting those changes in a metadata record. If you transmit or provide the data to another user, it is your responsibility to provide appropriate content, limitation, warranty and liability information as you see fit.
Distributor Organization Minnesota Geospatial Information Office (MnGeo)
Ordering Instructions These air photos are available via MnGeo's WMS service. Click on the link below for more information about WMS services and how to use them.
Online Linkage Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" in Section 6 of this metadata.

Full Metadata

2009 Northeast Minnesota, 50-cm Resolution, Digital Orthorectified Images

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 Department of Natural Resources, Minnesota Pollution Control Agency, St. Louis County, U.S. Geological Survey, and Keystone Aerial Surveys Inc.
Title 2009 Northeast Minnesota, 50-cm Resolution, Digital Orthorectified Images
Abstract This dataset contains 4 Band (RGBI) digital orthophoto imagery of Cook, Lake, St. Louis and Carlton counties in northern Minnesota.

The orthophotos are 0.5 meter ground sample distance (GSD) and are in UTM Zone 15, NAD83 (meters). The tiling format of the imagery is based on a 3.75' x 3.75' quarter quadrangle with a 150 meter buffer on all four sides. This dataset includes 969 digital orthophoto quarter quadrangles (DOQQs) in GeoTiff format with an associated world file, and this metadata file. The data is available online as a web mapping service (WMS).

All imagery was collected by Keystone Aerial Surveys Inc with a Vexcel UltraCamX camera from an altitude of approximately 24,000 feet. All imagery was processed by Keystone using the camera manufacturer's software, Inpho's photogrammetry suite and Keystone-created software.

Funding for this data was provided by the Minnesota Natural Heritage Fund, the Minnesota Clean Water Legacy Act, The Environmental and Natural Resources Trust Fund, St. Louis County, the Coastal Zone Management Program, and the National Geospatial Intelligence Agency.
Purpose The orthophotos will be used by the Minnesota DNR to update the National Wetland Inventory maps and as a base layer for mapping wetlands and other business needs. Additional funding was provided for this enhanced resolution dataset by the Minnesota Pollution Control Agency, St. Louis County, and the U.S. Geological Survey to support their various business needs. This type of leaf-off photography is a critical component for a variety of land management applications including transportation planning, wetland mapping, urban planning, forest management, soil mapping, and utility siting.
Time Period of Content Date 05/2009
Currentness Reference Month that the photography was flown.
Progress Complete
Maintenance and Update Frequency Irregular
Spatial Extent of Data All of Cook, Lake and St. Louis counties and northern portion of Carlton county, Minnesota
Bounding Coordinates -93.102598
-89.457962
48.707178
46.600572
Place Keywords Cook, Lake, St. Louis, Carlton, Minnesota, Northern Minnesota, Arrowhead
Theme Keywords imageryBaseMapsEarthCover, Orthophotography, Digital Orthophotography, Ortho, Orthophotos, Digital Orthorectified Images, Digital Orthophotos, DOQ, DOQQ, Imagery, Images, Aerial Photography, Aerial Photos, Digital Aerial Photography, Air Photo, Color Infrared, Four Band Imagery
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints Unrestricted
Use Constraints Imagery is the property of the State of Minnesota.

Redistribution conditions: In obtaining this data from MnGeo, it is understood that you and/or your organization have the right to use it for any purpose. If you modify it, you are encouraged to apply responsible best practices by documenting those changes in a metadata record. If you transmit or provide the data to another user, it is your responsibility to provide appropriate content, limitation, warranty and liability information as you see fit.
Contact Person Information Steve Kloiber, Wetland Monitoring Coordinator
Minnesota Department of Natural Resources
500 Lafayette Road
St. Paul, MN 55155
Phone: 651-259-5164
FAX:
E-mail: steve.kloiber@state.mn.us
Browse Graphic none available
Browse Graphic File Description
Associated Data Sets Some areas of this project were flown at 30-centimeter resolution; see: http://www.mngeo.state.mn.us/chouse/metadata/ne2009_doqq_30cm.html

For information on other air photos available for Minnesota, see: http://www.mngeo.state.mn.us/chouse/airphoto/

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy NA
Logical Consistency NA
Completeness The dataset is complete to the specifications lain out by MNDNR such that there are no omissions or generalizations that affect the completeness of the dataset.
Horizontal Positional Accuracy The target accuracy standard was the ASPRS standard for 1:12,000 scale maps, 95% of well-defined points fall within 24.5 feet. The vendor's horizontal accuracy test yielded a circular RMSE of 11.0 feet. An independent horizontal accuracy test was performed by the Minnesota DNR. The result from the independent check yielded an RMSE of 6.6 feet with a 95% confidence interval of 11.5 feet. This corresponds to the ASPRS accuracy standard for 1:6000 scale maps.
Vertical Positional Accuracy NA
Lineage Keystone Aerial Surveys Inc. acquired new vertical, digital black and white, color, and color infrared, photography at an altitude of 24,000 feet, at a photo scale of 1''= 5787 (1:69,444) with a 0.5-meter GSD (ground sample distance) with Vexcel UltraCamX cameras. Flight lines were north-to-south with a 60% forward overlap and a 20% side lap. The 48 flight lines and 3239 exposures were flown in May of 2009.

The UltraCamX camera consists of 13 sensors: 9 panchromatic sensors and 4 color sensors. The color sensors are 4810 x 3140 pixels in size, with one sensor capturing red data, one capturing blue data, one capturing green data, and one capturing near-infrared data (band pass 680-940nm). The 9 pan sensors slightly overlap one to another and are used to produce one large image, 14430 x 9420 pixels in size. The vendor's processing software and current calibration are used to create the final image and pan sharpen the color bands to create the final RGBI image at the above dimensions and a pixel size of 7.2 microns.

The digital acquisition was accompanied by the collection of airborne Global Positioning System (GPS) data and inertial measurement unit (IMU) data, the post processing of which yields a strong exterior orientation (EO) for each photograph and a very accurate center position. A fully analytical Aerotriangulation (AT) of the aerial images was conducted using ground control, GPS and the IMU data to further refine the EO for each image to be used in the orthorectification process. This was accomplished with Inpho Match-AT.

The MNDNR provided the USGS 30-meter DEM to Keystone for use in the orthorectification process. These were loaded into visualization software to confirm their accuracy and, where needed, were corrected and/or enhanced using Inpho DTMaster.

Digital Orthophoto Quarter-Quads were developed following the USGS standards for digital orthophotos (DOQs) with the exception of pixel resolution (0.5 meters) and file format (TIFF with world files). USGS header (.hdr) files were not included as a deliverable. Keystone used Inpho OrthoMaster to create orthophotos, Inpho OrthoVista to seam the DOQQs and the Inpho suite, ESRI ArcGIS and Photoshop CS3 to radiometrically balance and seam the DOQQs.

MnGeo used the TIFF files to create the WMS (web mapping service) layer that is available online.
Source Scale Denominator
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment NA
Geographic Reference for Tabular Data NA
Spatial Object Type Raster
Vendor Specific Object Types
Tiling Scheme 3.75 minute quarter quadrangles (USGS)
 
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 NA
Altitude Datum NAVD88
Altitude Units NA
Depth Datum NA
Depth Units NA
Cell Width 0.3
Cell Height 0.3
UTM Zone Number 15
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview Imagery has 4 Bands with the order of Red, Green, Blue and Near Infrared
Entity and Attribute Detailed Citation
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Minnesota Department of Natural Resources
Publication Date 12/2009
Contact Person Information Nancy Rader
GIS Data Coordinator
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street, Room 300
St. Paul, MN 55155
Phone: 651-201-2489
FAX: 651-296-3698
E-mail: clearing.house@state.mn.us
Distributor's Data Set Identifier ne2009_doqq_50cm
Distribution Liability For data or maps delivered online or by physical media by the Minnesota Geospatial Information Office (MnGeo)

Limitations: Although extensive effort has been made to produce error-free and complete data, all geographic information has limitations due to the scale, resolution, date and interpretation of the original source materials. Users should consult available data documentation (metadata) for this particular data to determine limitations and the precision to which the data depict distance, direction, location or other geographic characteristics. Data may be subject to change without prior notification.

No warranty: Data is provided 'as is,' without any warranty whatsoever, including but not limited to any warranty as to performance, merchantability or fitness for any particular purpose.

Liability: The entire risk as to the results of the use of this data is assumed by the user. MnGeo is not responsible for any interpretation or conclusions made by those who acquire or use it. MnGeo shall not be liable for any direct, indirect, special, incidental, compensatory or consequential damages or third-party claims resulting from the use of this data, even if MnGeo has been advised of the possibility of such potential loss or damage. In states that do not allow the exclusion or limitation of incidental or consequential damages, this data may not be used.

Redistribution conditions: In obtaining this data from MnGeo, it is understood that you and/or your organization have the right to use it for any purpose. If you modify it, you are encouraged to apply responsible best practices by documenting those changes in a metadata record. If you transmit or provide the data to another user, it is your responsibility to provide appropriate content, limitation, warranty and liability information as you see fit.

Data delivered on electronic media: If data has been requested from MnGeo on magnetic media, CD or any other physical media, MnGeo will deliver it in the computer-readable format agreed upon with the requestor. MnGeo will reissue data if it is unreadable by correctly adjusted computer input devices or when the media is delivered in a damaged condition. Requests for reissue of this digital data product must be made within 30 days of the date shipped from MnGeo.
Transfer Format Name
Transfer Format Version Number
Transfer Size Varies
Ordering Instructions These air photos are available via MnGeo's WMS service. Click on the link below for more information about WMS services and how to use them.
Online Linkage Click here to download data. (See Ordering Instructions above for details.) By clicking here, you agree to the notice in "Distribution Liability" above.
 
Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 06/29/2010
Contact Person Information Steve Kloiber, Wetland Monitoring Coordinator
Minnesota Department of Natural Resources
500 Lafayette Road
St. Paul, MN 55155
Phone: 651-259-5164
FAX:
E-mail: steve.kloiber@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: 06/29/2010