| Section 1 | Overview | |||
| Originator | Minnesota Department of Natural Resources, Surdex Corporation | |||
| Title | Digital Orthoimagery, Twin Cities, Spring 2010, 1-ft Resolution | |||
| Abstract | This dataset contains leaf-off 4 Band, red, green, blue, infrared (RGBI) digital orthophoto imagery of Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and Washington counties in east-central Minnesota. It was produced at 1-foot (30 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, The Environmental and Natural Resources Trust Fund, the Metropolitan Council, the National Geospatial-Intelligence Agency (NGA) and the Metropolitan Mosquito Control District. This metadata record was created by the Minnesota Geospatial Information Office (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 | 7-county Twin Cities metro: Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and Washington counties, Minnesota | |||
| Bounding Coordinates | -94.34 -92.62 45.75 44.43 | |||
| Place Keywords | Minnesota, MN, Anoka, Carver, Dakota, Hennepin, Ramsey, Scott, Washington, Twin Cities | |||
| 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 | Some areas of this project were flown at half-meter resolution; see: https://www.mngeo.state.mn.us/chouse/metadata/ecmn2010_doqq_50cm.html
For information on other air photos available for Minnesota, see: https://www.mngeo.state.mn.us/chouse/airphoto/ | |||
| Section 2 | Data Quality | |||
| Attribute Accuracy | N/A | |||
| Logical Consistency | N/A | |||
| Completeness | Created using native 1-foot and resampled 0.5-foot for a complete 1.0-foot gsd data set over 7 counties in metropolitan Minneapolis/St. Paul area. | |||
| Horizontal Positional Accuracy | An overall accuracy for this product was targeted for 1.5 meters, CE95. Surdex collected Airborne GPS data at the time of image acquisition and supplemented with several control points surveyed by ground crews, including a higher density of points in Scott and Dakota Counties, where the 1-foot product was resampled from a 0.5-foot product. A total of 87 control points were used to assess the positional accuracy. 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 altittude of 10,000 feet above mean terrain for most of the project area though some data was captured at 5,000 feet above mean terrain and resampled for multiple resolution delivery. Conditions allowed 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 a variety of sources from 10m DEM to 3d stereo collection) 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 | 0.300000 | |||
| Cell Height | 0.300000 | |||
| 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 Email: gisinfo.mngeo@state.mn.us | |||
| Distributor's Data Set Identifier | ecmn2010_doqq_1ft | |||
| Distribution Liability | MnGeo's data disclaimer is online: https://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, link to a service, or provide more instructions. See "Ordering Instructions" above for details. | |||
| Section 7 | Metadata Reference | |||
| Metadata Date | 02/04/2015 | |||
| Contact Person Information | Nancy Rader,
GIS Data Coordinator Minnesota Geospatial Information Office (MnGeo) 658 Cedar Street St. Paul, MN 55155 Phone: 651-201-2489 Email: gisinfo.mngeo@state.mn.us | |||
| Metadata Standard Name | Minnesota Geographic Metadata Guidelines | |||
| Metadata Standard Version | 1.2 | |||
| Metadata Standard Online Linkage | https://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm | |||