High Resolution Orthoimage (DOQ): Border Region of NW Minnesota and Manitoba, Canada, 2009, UTM Zone 15

This page last updated: 03/24/2010
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator 3001, Inc.
Abstract An orthoimage (DOQ) is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. For this dataset, the natural color orthoimages were produced at 0.3-meter pixel resolution (approximately 1-foot). The design accuracy is estimated not to exceed 6 meter horizontal RMSE for locations within the United States. Each orthoimage provides imagery for a 1500-meter by 1500-meter block on the ground. The projected coordinate system is UTM with a NAD83 datum, spheroid GRS80. There is no image overlap between adjacent files. The naming convention is based on the U.S. National Grid (USNG), taking the coordinates of the SW corner of the orthoimage.

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Note: This metadata record was created by the Minnesota Geospatial Information Office (MnGeo) based on the metadata provided by 3001, Inc. for individual Zone 15 tiles. It describes the layers that MnGeo created for its WMS service from the tiled dataset.
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Browse Graphic none available
Time Period of Content Date 07/2009
Currentness Reference Ground condition. (As more exact date(s) are confirmed, they will be added to this metadata)
Access Constraints Any downloading and use of these data signifies a users agreement to comprehension and compliance of the U.S. Government Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and U.S. Government interests.
Use Constraints There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Government.
Distributor Organization Minnesota Geospatial Information Office (MnGeo)
Ordering Instructions The imagery is available via MnGeo's Geospatial Image Server as a WMS service. The website provides 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

High Resolution Orthoimage (DOQ): Border Region of NW Minnesota and Manitoba, Canada, 2009, UTM Zone 15

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 3001, Inc.
Title High Resolution Orthoimage (DOQ): Border Region of NW Minnesota and Manitoba, Canada, 2009, UTM Zone 15
Abstract An orthoimage (DOQ) is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. For this dataset, the natural color orthoimages were produced at 0.3-meter pixel resolution (approximately 1-foot). The design accuracy is estimated not to exceed 6 meter horizontal RMSE for locations within the United States. Each orthoimage provides imagery for a 1500-meter by 1500-meter block on the ground. The projected coordinate system is UTM with a NAD83 datum, spheroid GRS80. There is no image overlap between adjacent files. The naming convention is based on the U.S. National Grid (USNG), taking the coordinates of the SW corner of the orthoimage.

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Note: This metadata record was created by the Minnesota Geospatial Information Office (MnGeo) based on the metadata provided by 3001, Inc. for individual Zone 15 tiles. It describes the layers that MnGeo created for its WMS service from the tiled dataset.
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Purpose These data have been created as a result of the need for having geospatial data immediately available and easily accessible in order to provide geographic reference for federal, state, and local emergency responders, as well as for homeland security efforts. Orthoimages also serve a variety of purposes, from interim maps to field references for earth science investigations and analysis. The digital orthoimage is useful as a layer of a geographic information system. These data can be used to provide reference information for web browsers and for map applications at a scale of 1:100:000 or smaller.
Time Period of Content Date 07/2009
Currentness Reference Ground condition. (As more exact date(s) are confirmed, they will be added to this metadata)
Progress Complete
Maintenance and Update Frequency Irregular
Spatial Extent of Data Eastern Roseau, northern Lake of the Woods, and NW Koochiching counties (Minnesota), southern border area of Manitoba, Canada.
Bounding Coordinates -95.96
-93.97
49.56
48.09
Place Keywords Minnesota, Manitoba, Canada, Roseau County, Lake of the Woods County, Koochiching County
Theme Keywords imageryBaseMapsEarthCover, Digital Orthorectified Image, Digital Orthophoto Quad, Ortho, Orthophoto, DOQ, Air Photo, Air Photography, Aerial Photo, Aerial Photography
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints Any downloading and use of these data signifies a users agreement to comprehension and compliance of the U.S. Government Standard Disclaimer. Insure all portions of metadata are read and clearly understood before using these data in order to protect both user and U.S. Government interests.
Use Constraints There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Government.
Contact Person Information ,


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Phone:
FAX:
E-mail: none available
Browse Graphic none available
Browse Graphic File Description
Associated Data Sets For information on other air photos available for Minnesota, see http://www.mngeo.state.mn.us/chouse/airphoto/index.html

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy Sample points taken from overlapping areas of adjacent image strips that contributed image chips to each orthophoto tile are typically consistent to the 2-3 pixel level. This not only ensures that a consistent mosaic can be created from the adjacent image strips acquired with the ADS40-II pushbroom scanner but also means that the images have good precision and as a group are spatially self-consistent.
Logical Consistency Compliance with the accuracy standard was ensured by the use of photo identifiable ground control points and/or the collection of airborne GPS data.
Completeness Complete
Horizontal Positional Accuracy The accuracy value for locations within the United States was determined by measuring photo-identifiable control points collected with GPS survey methods in the orthophotos.
Lineage Processing information provided by 3001, Inc.:

Ground control consisted of photo identifiable surveyed points within the United States. The imagery was collected at an average altitude of 9500 ft above mean terrain (AMT) using an ADS40-II digital sensor. Image quality was verified during the post flight review phase. Factors considered during this review included but were not limited to the presence of smoke and/or cloud cover, contrails, light conditions and sun glint.

The triangulated strips were rectified with a recent DSM of the area provided as GFI (SRTM2, DTED2, Intermap NEXTmap USA, Canada NED, Mexican Border Lidar), and supplemented with higher resolution DSM data where readily available. The vertical accuracy of the DSM varies based on the elevation postings of GFI products and requirements thereof.

The red, green, and blue bands were combined to generate a natural color orthophoto. The ADS40-II sensor collects twelve bit image data which requires radiometric adjustment for output in standard eight bit image channels. Converting to eight bit results in a reduction of the color range from 4096 to 256 - thus loss of radiometric detail is inevitable. The extra dynamic range of the sensor permits greater object differentiation in shadows and in bright areas. The twelve bit dynamic range permitted the imagery to be more effectively color balanced than is possible with eight bit imagery. This was accomplished by performing tonal enhancements immediately prior to the reduction from twelve bit to eight bit data. In addition to color balancing, these eight bit images were adjusted to create seamless imagery to the highest extent practically achievable. The imagery was mosaicked using a combination of automated and manual seamline generation. Project specified tiles were extracted from the mosaic to produce a natural color digital orthophoto image map.

Final image tiles were reviewed for artifacts and anomalies and adjusted as part of quality control procedures. When necessary, local corrections to the imagery were performed to minimize such effects.


MnGeo processing:

MnGeo created the layers for the WMS service from the tiles provided to them by the U.S. Geological Survey. One layer was created for the UTM Zone 14 tiles and another for the Zone 15 tiles.
Source Scale Denominator
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment Microsoft Windows XP, Service Pack 2; ESRI ArcMap 9.1
Geographic Reference for Tabular Data
Spatial Object Type Raster
Vendor Specific Object Types
Tiling Scheme
 
Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme UTM
Ellipsoid Geodetic Reference System 1980
Horizontal Datum NAD83
Horizontal Units Meters
Distance Resolution
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 Natural color orthoimagery is organized in three color bands or channels which represent the red, green, and blue (RGB) portions of the spectrum. Each image pixel is assigned a triplet of numeric values, one for each color band. Numeric values range from 0 to 255. Areas where data are incomplete due to lack of full image coverage are represented with the numeric value of 0.
Entity and Attribute Detailed Citation
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher 3001, Inc.
Publication Date 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
Distribution Liability 1. USGS: There is no guarantee of warranty concerning the accuracy of the data. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Government.

2. MnGeo: DISTRIBUTION LIABILITY STATEMENT
For data or maps delivered online or by physical media by the Minnesota Geospatial Information Office

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 individuals or organizations have the right to use it for any internal purpose. If data is modified, changes should be documented in a metadata record that should accompany all redistributed data. If data is transmitted or provided in any form to another user, the data must be accompanied by a copy of this disclaimer and all documentation provided with the original data set, including the full metadata record.

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
Ordering Instructions The imagery is available via MnGeo's Geospatial Image Server as a WMS service. The website provides 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 03/24/2010
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
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: 03/24/2010