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This page last updated: 09/14/2000
Metadata created using Minnesota Geographic Metadata Guidelines
| Originator | Metropolitan Council |
| Abstract | This dataset contains 265 digital, black and white orthophoto quarter-quadrangles (DOQs), 3.75' x 3.75', covering the 7 county Twin Cities (Minneapolis and St. Paul) Metropolitan Area in Minnesota. Each CD-ROM contains up to 4 quarter-quadrangles of a USGS 7.5 minute quadrangle, where a quarter-quadrangle is included IF it's coverage includes any portion of the Twin cities 7 county area. The orthophotos are in UTM, Zone 15, NAD83 projection. Each image is approximately 120 Mb, with a .6 meter image pixel, and available in TIFF format. There are a total of 76 CD-ROMs plus one CD-ROM that contains one metadata record for the dataset and a header file (.hdr) for each image. These DOQs were produced using the USGS DOQ specifications except for the scan resolution (pixel size is .6m rather than 1 meter) and the file format. The original imagery was collected at 20,000 ft and centered on USGS quarter-quads. |
| Browse Graphic | View a sample of the data. |
| Time Period of Content Date | 04/1997 |
| Currentness Reference | The dates of the original aerial photography were April 13 and April 14, 1997 with a couple of reflights in late April. |
| Access Constraints | Subject to License Agreement with the Metropolitan Council. |
| Use Constraints | Subject to License Agreement with the Metropolitan Council. |
| Distributor Organization | Metropolitan Council |
| Ordering Instructions | Call the Metropolitan Council Regional Data Center at 651-602-1140. Additionally, this dataset is available for direct use via one or more map services. More information about what a web mapping service is can be found at http://www.datafinder.org/services/ . The specific map service and layer name for this dataset can be found by clicking the blue or green boxes under the map service column of the DataFinder Catalog at http://www.datafinder.org/catalog/ . |
| Online Linkage | none available |
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 | Metropolitan Council | |||
| Title | 1997 Digital Orthophotos, Twin Cities Metropolitan Area | |||
| Abstract | This dataset contains 265 digital, black and white orthophoto quarter-quadrangles (DOQs), 3.75' x 3.75', covering the 7 county Twin Cities (Minneapolis and St. Paul) Metropolitan Area in Minnesota. Each CD-ROM contains up to 4 quarter-quadrangles of a USGS 7.5 minute quadrangle, where a quarter-quadrangle is included IF it's coverage includes any portion of the Twin cities 7 county area. The orthophotos are in UTM, Zone 15, NAD83 projection. Each image is approximately 120 Mb, with a .6 meter image pixel, and available in TIFF format. There are a total of 76 CD-ROMs plus one CD-ROM that contains one metadata record for the dataset and a header file (.hdr) for each image. These DOQs were produced using the USGS DOQ specifications except for the scan resolution (pixel size is .6m rather than 1 meter) and the file format. The original imagery was collected at 20,000 ft and centered on USGS quarter-quads. | |||
| Purpose | Metropolitan Council purchased digital aerial photography for their 1997 generalized land use interpretation project. Digital orthophoto production from this digital imagery was found to be more useful to this project, other divisions and projects within Metropolitan Council, as well as many other organizations in the metropolitan area. Costs of the digital orthophoto productions were shared by partners with Metropolitan Council. | |||
| Time Period of Content Date | 04/1997 | |||
| Currentness Reference | The dates of the original aerial photography were April 13 and April 14, 1997 with a couple of reflights in late April. | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | Unknown. The Metropolitan Council is required to collect Generalize Land Use data at the same time as the Census. The Met. Council plans to acquire aerial imagery for that project again in 2000, but not necessarily DOQs. | |||
| Spatial Extent of Data | Twin Cities 7 County Metropolitan Area. This includes the counties of Anoka, Carver, Dakota, Hennepin, Ramsey, Scott and Washington in Minnesota. | |||
| Bounding Coordinates | -94.06 -92.69 45.44 44.44 |
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| Place Keywords | Twin Cities, Anoka County, Carver County, Dakota County, Hennepin County, Ramsey County, Scott County, Washington County | |||
| Theme Keywords | orthophotography, ortho, orthophoto, DOQ, DOQQ, imagery, image, digital ortho, aerial photography, aerial photos, digital aerial photography | |||
| Theme Keyword Thesaurus | ||||
| Access Constraints | Subject to License Agreement with the Metropolitan Council. | |||
| Use Constraints | Subject to License Agreement with the Metropolitan Council. | |||
| Contact Person Information | Tanya Mayer,
GIS Coordinator Metropolitan Council 390 Robert Street North St. Paul, Minnesota 55101-1805 Phone: 651-602-1604 FAX: 651-602-1674 E-mail: tanya.mayer@metc.state.mn.us | |||
| Browse Graphic | View a sample of the data. | |||
| Browse Graphic File Description | Sample map showing the orthos1997 layer. | |||
| Associated Data Sets | 2000 Metropolitan Council Digital Orthophotos, 1991 USGS DOQs |
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| Section 2 | Data Quality Information | Top of full metadata | Top of page | |
| Attribute Accuracy | ||||
| Logical Consistency | ||||
| Completeness | ||||
| Horizontal Positional Accuracy | NMAS @ 1:24000 scale, 7.4 rms 1 - sigma (or 12.2m @ 90% confidence), DOQQ Spec. | |||
| Vertical Positional Accuracy | Not applicable | |||
| Lineage | Orthophotos were developed under contract with Horizons, Inc. All pertinent information for each dataset is contained in a header file (.HDR) which has been provided for each image. An example of these header files is shown below: BEGIN_USGS_DOQ_HEADER * QUADRANGLE_NAME LAKE FREMONT * QUADRANT SE * WEST_LONGITUDE -93 33 45.000 * EAST_LONGITUDE -93 30 0.000 * NORTH_LATITUDE 45 26 15.000 * SOUTH_LATITUDE 45 22 30.000 * PRODUCTION_DATE 1998 05 11 * RASTER_ORDER LEFT_RIGHT/TOP_BOTTOM * BAND_ORGANIZATION SINGLE FILE * BAND_CONTENT BLACK&WHITE * BITS_PER_PIXEL 8 * SAMPLES_AND_LINES 9266 12650 * HORIZONTAL_DATUM NAD83 * HORIZONTAL_COORDINATE_SYSTEM UTM * COORDINATE_ZONE 15 * HORIZONTAL_UNITS METERS * HORIZONTAL_RESOLUTION 0.6 * SECONDARY_HORIZONTAL_DATUM NAD27 * XY_ORIGIN 455640.000 5032010.000 * SECONDARY_XY_ORIGIN 455657.365 5031796.177 * NATION US * STATE MN * NW_QUAD_CORNER_XY 456005.090 5031706.845 * NE_QUAD_CORNER_XY 460893.411 5031674.551 * SE_QUAD_CORNER_XY 460850.262 5024731.100 * SW_QUAD_CORNER_XY 455956.546 5024763.395 * SECONDARY_NW_QUAD_XY 456003.779 5031489.290 * SECONDARY_NE_QUAD_XY 460892.246 5031456.995 * SECONDARY_SE_QUAD_XY 460849.097 5024513.595 * SECONDARY_SW_QUAD_XY 455955.235 5024545.891 * RMSE_XY 1.2 * IMAGE_SOURCE black & white film * SOURCE_IMAGE_ID 93-09-686 * SOURCE_IMAGE_DATE 1997 04 14 * SOURCE_DEM_DATE 0000 00 00 * AGENCY Metropolitan Council * PRODUCER Horizons, Inc. * PRODUCTION_SYSTEM KLT v1.0 10/97 MDOQ v1.0 12/97 * STANDARD_VERSION 1996 12 * METADATA_DATE 1998 05 11 * DATA_FILE_SIZE 117224166 * BYTE_COUNT 9266 * END_USGS_HEADER * |
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| Source Scale Denominator | 40000 | |||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | ||||
| Geographic Reference for Tabular Data | ||||
| Spatial Object Type | Raster | |||
| Vendor Specific Object Types | ||||
| Tiling Scheme | USGS 3.75 minute quadrangle sheets (7.5 minute ''quarter quads'') | |||
| 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 | ||||
| Altitude Datum | NAVD88 | |||
| Altitude Units | Meters | |||
| Cell Width | 0.6 | |||
| Cell Height | 0.6 | |||
| UTM Zone Number | 15 | |||
| Section 5 | Entity and Attribute Information | Top of full metadata | Top of page | |
| Entity and Attribute Overview | |
| Entity and Attribute Detailed Citation | ||||
| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | Metropolitan Council | |||
| Publication Date | 02/1999 | |||
| Contact Person Information | Regional Data Center Metropolitan Council Mears Park Centre, 390 Robert Street North St. Paul, MN 55101-1805 Phone: 651-602-1140 FAX: E-mail: datacenter@metc.state.mn.us |
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| Distributor's Data Set Identifier | orthos1997 | |||
| Distribution Liability | See license agreement. | |||
| Transfer Format Name | Scanline (strip) TIFF with world files (.TFW) for geographic reference. | |||
| Transfer Format Version Number | TIFF version 6.0 | |||
| Transfer Size | Approximately 120 Mb per Quarter - Quadrangle | |||
| Ordering Instructions | Call the Metropolitan Council Regional Data Center at 651-602-1140. Additionally, this dataset is available for direct use via one or more map services. More information about what a web mapping service is can be found at http://www.datafinder.org/services/ . The specific map service and layer name for this dataset can be found by clicking the blue or green boxes under the map service column of the DataFinder Catalog at http://www.datafinder.org/catalog/ . |
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| Online Linkage | none available | |||
| Section 7 | Metadata Reference Information | Top of full metadata | Top of page | |
| Metadata Date | 09/14/2000 | |||
| Contact Person Information | Tanya Mayer,
GIS Coordinator Metropolitan Council 390 Robert Street North St. Paul, Minnesota 55101-1805 Phone: 651-602-1604 FAX: 651-602-1674 E-mail: tanya.mayer@metc.state.mn.us |
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| 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: 09/14/2000
