Digital Orthorectified Images, Southern Minnesota, Half-Meter Resolution, Spring 2011

This page last updated: 12/05/2012
Metadata created using Minnesota Geographic Metadata Guidelines


Go to Section:
1. Overview
2. Data Quality
3. Data Organization
4. Coordinate System
5. Attributes
6. Distribution - Get Data
7. Metadata Reference

Section 1 Overview
Originator Minnesota Department of Natural Resources, Surdex Corporation
Title Digital Orthorectified Images, Southern Minnesota, Half-Meter Resolution, Spring 2011
Abstract This dataset contains leaf-off 4 Band (RGBI) digital orthophoto imagery produced at half-meter (50 cm) resolution from new aerial photography captured in Spring 2011. The imagery covers 37 counties in southern Minnesota: Dodge, Faribault, Fillmore, Freeborn, Goodhue, Houston, Jackson, Kandiyohi, Lac qui Parle, Le Sueur, Lincoln, Lyon, Martin, McLeod, Mower, Murray, Nicollet, Nobles, Olmsted, Pipestone, Redwood, Renville, Rice, Rock, Sibley, Steele, Swift, Wabasha, Waseca, Watonwan, Winona and Yellow Medicine.

Funding for this data was provided by the Minnesota Natural Heritage Fund, the Minnesota Clean Water Legacy Act, and The Environmental and Natural Resources Trust Fund.

This metadata record was created by MnGeo using information supplied by Surdex Corporation.
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. 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 04/2011
Currentness Reference Ground condition. Flown mid-April, 2011.
Progress Complete
Maintenance and Update Frequency Unknown
Spatial Extent of Data 37 counties in southern Minnesota - see Place Keywords
Bounding Coordinates -97
-91
45.75
43.5
Place Keywords Big Stone, Blue Earth, Brown, Chippewa, Cottonwood, Dodge, Faribault, Fillmore, Freeborn, Goodhue, Houston, Jackson, Kandiyohi, Lac qui Parle, Le Sueur, Lincoln, Lyon, Martin, McLeod, Mower, Murray, Nicollet, Nobles, Olmsted, Pipestone, Redwood, Renville, Rice, Rock, Sibley, Steele, Swift, Wabasha, Waseca, Watonwan, Winona, Yellow Medicine, Minnesota
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
Email: steve.kloiber@state.mn.us
Browse Graphic None available
Associated Data Sets For information on other air photos available for Minnesota, see: www.mngeo.state.mn.us/chouse/airphoto/

Section 2 Data Quality
Attribute Accuracy N/A
Logical Consistency N/A
Completeness The half-meter project area was slightly scaled back in mid-May due to rapidly changing foliage conditions on the ground site. The state elected to delay acquisition in one county, Meeker County, until leaf-off 2013.
Horizontal Positional Accuracy An overall accuracy for this product was targeted for 2.4 meters, CE90. Surdex collected Airborne GPS data at the time of image acquisition and supplemented with several control points surveyed by ground crews. Surdex used these ground control points and additionally some QC points dropped out of the Triangulation in order to validate the accuracy of the final DOQQ product. Of all the points collected, 71 were easily readable in the final product and were used to calculate the stated residual.

Minnesota Dept. of Transportation staff independently tested the horizontal positional accuracy of the DOQs.
Total number of targets = 171
RMSE = 0.819
NSSDA = 1.418 (95% confidence level)
Their full accuracy report is at: www.mngeo.state.mn.us/chouse/airphoto/DOQ_Accuracy_Report_MnDOT_southmn2011.pdf
Vertical Positional Accuracy None - this is a horizontal only product.
Lineage Multiple aircraft were deployed to southern Minnesota in early April 2011 for digital image acquistion during leaf-off conditions. Cessna Conquests equipped with Intergraph DMC (Digital Mapping Cameras) captured 4 band imagery over the project sites. Imagery was captured at an altittude of 16,500' above mean terrain, allowing up 5% cloud conditions per frame. All four bands (rgb natural color plus near infrared) of raw camera data were processed by Surdex using Intergraph PPS software coupled with Surdex proprietary image handling software for color correction and dodging. Post processing of Airborne and Ground GPS data was performed with Waypoint Consulting's GrafNav software. Aerial Triangulation was completed using Intergraph ImageStation Automatic Triangulation and rectification of imagery to the state supplied 10 meter DEM was completed using Surdex proprietary software. Image mosaicking, QC and final DOQQ products were produced using proprietary Surdex software.

Section 3 Spatial Data Organization (not used in this metadata)

Section 4 Coordinate System
Horizontal Coordinate Scheme Universal Transverse Mercator
UTM Zone Number 15
Horizontal Datum NAD83
Horizontal Units meters
Cell Width 0.500000
Cell Height 0.500000

Section 5 Attributes
Overview Imagery has 4 Bands with the order of Red, Green, Blue and Near Infrared
Detailed Citation
Table Detail:

Section 6 Distribution
Publisher Minnesota Department of Natural Resources
Publication Date 12/2011
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office
658 Cedar Street, Room 300
St. Paul, MN  55155
Phone: 651-201-2489
Email: clearing.house@state.mn.us
Distributor's Data Set Identifier South MN DOQs, Spring 2011
Distribution Liability MnGeo's full disclaimer is here: www.mngeo.state.mn.us/chouse/disclaimer.html
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 I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process or link to download information. See "Ordering Instructions" above for details.

Section 7 Metadata Reference
Metadata Date 12/05/2012
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office
658 Cedar Street, Room 300
St. Paul, MN  55155
Phone: 651-201-2489
Email: clearing.house@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: 12/05/2012
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