Digital Orthoimagery, East-Central Minnesota, Spring 2010, 0.5-m Resolution

This page last updated: 01/21/2015
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 Orthoimagery, East-Central Minnesota, Spring 2010, 0.5-m Resolution
Abstract This dataset contains leaf-off 4 Band, red, green, blue, infrared (RGBI) digital orthophoto imagery of Chisago, Isanti, Sherburne and Wright counties in east-central Minnesota. It was produced at half-meter (50 cm) resolution from new aerial photography captured in Spring 2010.

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 Spring 2010
Currentness Reference Ground condition. Flown mid-April, 2010
Progress Complete
Maintenance and Update Frequency Irregular
Spatial Extent of Data Chisago, Isanti, Sherburne and Wright counties, Minnesota
Bounding Coordinates -94.34
Place Keywords Minnesota, MN, Chisago, Isanti, Sherburne, Wright
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
Browse Graphic None available
Associated Data Sets Some areas of this project were flown at one-foot resolution; see:

For information on other air photos available for Minnesota, see:

Section 2 Data Quality
Attribute Accuracy N/A
Logical Consistency N/A
Completeness Half-meter project area was scaled back in early April due to rapidly changing foliage conditions on the ground site. The state elected to delay acquisition in the southern project area until leaf-off 2011.
Horizontal Positional Accuracy An overall accuracy for this product was targeted for 2.4 meters, CE95. 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 digital orthophoto quarter quads (DOQQ) product. Of all the points collected, only 20 were easily readable in the final product and were used to calculate the stated residual. 0.85, value in meters, CE95.
Vertical Positional Accuracy None - this is a horizontal only product.
Lineage Multiple aircraft were deployed to east central Minnesota in early April 2010 for digital image acquisition 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 altitude of 16,500 feet above mean terrain, allowing up 5% cloud conditions per frame. All four bands (RGB natural color plus near infrared) of raw camera data was processed 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 digital elevation model (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 10/06/2010
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street
St. Paul, MN  55155
Phone: 651-201-2489
Distributor's Data Set Identifier ecmn2010_doqq_50cm
Distribution Liability MnGeo's data disclaimer is online:
Ordering Instructions These air photos are very large and thus are not provided online for download. Instead, they are available to view as a web map service (WMS), part of MnGeo's Geospatial Image Service. Click on the link below for more information about the Geospatial Image Service and how to use web map services.
Online Linkage I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details.

Section 7 Metadata Reference
Metadata Date 01/21/2015
Contact Person Information Nancy Rader, GIS Data Coordinator
Minnesota Geospatial Information Office (MnGeo)
658 Cedar Street
St. Paul, MN  55155
Phone: 651-201-2489
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version 1.2
Metadata Standard Online Linkage

This page last updated: 01/21/2015
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