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This page last updated: 04/09/2007
Metadata created using Minnesota Geographic Metadata Guidelines
| Originator | Minnesota Department of Transportation and Land Management Information Center (LMIC) |
| Abstract | This set of GeoTIFF and EPPL7 files represents the Minnesota Department of Transportation's County Highway Map Series in georeferenced image formats. These images of the standard Mn/DOT County Highway Map product can be used in GIS systems and overlayed with other GIS information. The origin of this data is Mn/DOT's Microstation CAD system, where all linework, feature type coding, and symbolization is stored and updated. To produce these data sets, Mn/DOT exported the data from Microstation into postscript files. LMIC then imported the data into GIS systems for georeferencing and further processing. The GeoTIFF data are distributed in both County Highway Map map sheet and full county extents; EPPL7 data sets are distributed only as full county files. Map collars have been removed. This data set represents the Mn/DOT County Highway Map as of January 1, 2002. |
| Browse Graphic | View a sample of the data. |
| Time Period of Content Date | 01/01/2002 |
| Currentness Reference | Original County Highway Map .eps files were created from linework in Mn/DOT Microstation CAD system as of January 1, 2002. Within the CAD system, roads, railroads, and minor civil division (city and township boundaries) are updated annually. (Township roads are updated annually to the extent that changes are reported to Mn/DOT.) Rivers, lakes, and section lines were originally captured from USGS 7.5-minute topographic maps. Water feature name changes reported through the Minnesota Board of Geographic Names are updated. Information on cultural features (for example, pipelines, transmission lines, dwellings, public service facilities) were captured from aerial photography in the 1970's and are not routinely updated. |
| Access Constraints | None |
| Use Constraints | Subject to distribution liability conditions. |
| Distributor Organization | Minnesota Land Management Information Center (LMIC) |
| Ordering Instructions | The online linkage references a summary page about the County Highway Map georeferenced images. This Summary Page includes a listing by county, with links to download each available format. Formats available for download include: 1. Full county GeoTIFF files 2. MnDOT County Highway Map Sheet GeoTIFF files 3. Full county EPPL7 files Alternatively, to purchase a CD of all 87 EPPL7 county files, contact Ken Pekarek at 651.296.1201 or use data order form at http://www.lmic.state.mn.us/EPPL7/EPPLorderForm.pdf |
| 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. |
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 | Minnesota Department of Transportation and Land Management Information Center (LMIC) | |||
| Title | County Highway Map Series - Georeferenced Image Files (GeoTIFF and EPPL7 formats) | |||
| Abstract | This set of GeoTIFF and EPPL7 files represents the Minnesota Department of Transportation's County Highway Map Series in georeferenced image formats. These images of the standard Mn/DOT County Highway Map product can be used in GIS systems and overlayed with other GIS information. The origin of this data is Mn/DOT's Microstation CAD system, where all linework, feature type coding, and symbolization is stored and updated. To produce these data sets, Mn/DOT exported the data from Microstation into postscript files. LMIC then imported the data into GIS systems for georeferencing and further processing. The GeoTIFF data are distributed in both County Highway Map map sheet and full county extents; EPPL7 data sets are distributed only as full county files. Map collars have been removed. This data set represents the Mn/DOT County Highway Map as of January 1, 2002. | |||
| Purpose | The GeoTIFF version of the County Highway Map Series images were created by LMIC as background imagery for the Environmental Quality Board's High Voltage Transmission Line project. It has since been used as background imagery to support a number of GIS-supported activities, including pipeline mapping and municipal boundary updates. The EPPL7 county files are part of the Minnesota Environmental Atlas Project and the Local Planning Assistance (Hazard Mitigation) project. As a georeferenced background layer these data files can be used in GIS project and overlayed with GIS data. | |||
| Time Period of Content Date | 01/01/2002 | |||
| Currentness Reference | Original County Highway Map .eps files were created from linework in Mn/DOT Microstation CAD system as of January 1, 2002. Within the CAD system, roads, railroads, and minor civil division (city and township boundaries) are updated annually. (Township roads are updated annually to the extent that changes are reported to Mn/DOT.) Rivers, lakes, and section lines were originally captured from USGS 7.5-minute topographic maps. Water feature name changes reported through the Minnesota Board of Geographic Names are updated. Information on cultural features (for example, pipelines, transmission lines, dwellings, public service facilities) were captured from aerial photography in the 1970's and are not routinely updated. | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | Updates to the Mn/DOT Microstation CAD are made continuously; there is no plan in place to update EPPL7 and GeoTIFF versions. | |||
| Spatial Extent of Data | Minnesota, Statewide | |||
| Bounding Coordinates | -97.5 -89.0 49.5 43.0 |
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| Place Keywords | Minnesota, Statewide | |||
| Theme Keywords | transportation, Basemaps, County Highway Maps, Roads, Rivers, Lakes, Cities, Townships, Public Land Survey, Cultural Features | |||
| Theme Keyword Thesaurus | ISO 19115 Topic Category | |||
| Access Constraints | None | |||
| Use Constraints | Subject to distribution liability conditions. | |||
| Contact Person Information | Richard Schlosser,
Geographic Information and Mapping Unit Minnesota Department of Transportation MS 642, Transportation Building, John Ireland Blvd. St. Paul, Minnesota 55155 Phone: 651-296-5131 FAX: E-mail: richard.schlosser@state.mn.us | |||
| Browse Graphic | View a sample of the data. | |||
| Browse Graphic File Description | .PDF file of Ramsey County | |||
| Associated Data Sets | GIS data layers - such as roads, public land survey, lake and river features - that were used to create the Mn/DOT County Highway Maps are available for download from the Mn/DOT Basemap web page: http://www.dot.state.mn.us/tda/basemap/index.html |
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| Section 2 | Data Quality Information | Top of full metadata | Top of page | |
| Attribute Accuracy | Not applicable | |||
| Logical Consistency | File is not topologically structured. | |||
| Completeness | Full state coverage. | |||
| Horizontal Positional Accuracy | Locational accuracy for features derived from USGS 7.5-minute quadrangles cannot be assumed to exceed National map Accuracy Standards for 1:24,000 scale map (+/- 40 feet or 12 meters). | |||
| Vertical Positional Accuracy | Not applicable | |||
| Lineage | 1. Creation of Minnesota County Highway Maps 2001 Postscript (.eps) files from Mn/DOT Basemap GIS layers (Minnesota Department of Transportation): a. Linework for all features is digitized into the Microstation CAD system at Mn/DOT. Features include roads, rivers, lakes, ditches, public land survey lines, municipal boundaries, and cultural features. Originally, many of these features had been digitized by Mn/DOT from the USGS 1:24,000-scale topographic maps. Cultural features were captured from 1970's aerial photography. Road and municipal boundary information is updated continually. Other features are updated or corrected on a less regular basis. Cultural features have not been systematically updated since the original data capture. All features except township roads and cultural features are considered current as of January 1, 2002. The CAD system information includes linework coded by feature type (level) and map symbolization. The map symbolization is used to create the Mn/DOT County Highway Map Series. Data are stored by County Highway Map map sheet. Smaller counties can be represented on a single map sheet; larger counties require multiple sheets. (Note: from the Microstation CAD system, the linework, by feature type (level) is exported into Arc/Info, where attribute information is added. This set of GIS files becomes the basis for the Mn/DOT Basemap GIS data set). b. Data for each county highway map sheet is exported from the Microstation CAD system as an .eps (postscript) file. Linework within the CAD system is in UTM Zone 15, NAD83. The .eps file itself has no projection. 2. Conversion of Minnesota County Highway Maps Postscript (.eps) files to GeoTIFF and EPPL formats (Land Management Information Center): a. LMIC obtained from Mn/DOT a set of County Highway Map map sheet .eps files. b. Conversion of .eps files to TIFF files: Using Transverter Pro software, LMIC converted the individual map sheet .eps files to TIFF format, rasterizing the files at 720 ppi, or approximately 4.7-meter pixels. These files were black and white, uncompressed. c. Conversion of TIFF files to TIFF World files: Georeferencing was done using ArcMap Georeferencing tools. Georeferencing was done on each County Highway Map sheet. The TIFF files were loaded into ArcMap as image files. The Minnesota Department of Natural Resources Public Land Survey GIS layer section lines were used as the basis for the georeferencing. Initially, two points from the DNR PLS layer were used for rough positioning in the geographic environment. Then two more points were chosen for better fitting of the data. At that point, the two original points were dropped and two more added and the file was re-referenced. The operator then scanned around the image to look for areas of bad fit between the DNR PLS section lines and the section lines on the County Highway map TIFF file. Adjustments were made as necessary. Sometimes a good georeferencing fit could be made with just 4 points; sometimes it took 5 or 6 points for a good fit. Finally the 'georeference' command was run again, and the file was saved out to a georeferenced image (TIFF World file). d. Create GeoTIFFs: Georeferenced images were brought back into Arc/Info; converted to GRID; then saved out in a CCI4 compression (Arc grid-to-image export option:CCI4). e. Create Full County GeoTIFFs and EPPL7 files from County Highway Map Sheet GeoTIFFS: The EPPL7 software was used to clip out the map collar information from the GeoTIFF files, to adjust the map pixel size, and to mosaic the map sheets into full county files. A shapefile was created of County Highway Map map sheet boundaries. This was imported into EPPL7 as the clipfile, and used to clip the map collar information off of the GeoTIFF map files. EPPL7 processing was then used to simplify the map from a 4.7-meter to a 5-meter pixel size. An EPPL7 program was written to mosaic (append) all county map sheet files together into a full county map file. The county EPPL file was then exported out as a GeoTIFF file and loaded back into ArcGRID in order to modify the color file created in EPPL processing to have just two values (0,1) for black and white. |
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| Source Scale Denominator | 24000 | |||
| Section 3 | Spatial Data Organization Information | Top of full metadata | Top of page | |
| Native Data Set Environment | Microstation CAD | |||
| Geographic Reference for Tabular Data | Not applicable | |||
| Spatial Object Type | Vector | |||
| Vendor Specific Object Types | ||||
| Tiling Scheme | Full county and Mn/DOT County Highway Map Sheets | |||
| 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 | ||||
| Cell Width | 5 | |||
| Cell Height | 5 | |||
| UTM Zone Number | 15E | |||
| Section 5 | Entity and Attribute Information | Top of full metadata | Top of page | |
| Entity and Attribute Overview | The file is an image made up of a combination of features arranged cartographically. The individual elements such as roads and section lines cannot be extracted from the image, but could be obtained as digital GIS file from the Minnesota Department of Transportation. (See Associated Data Sets). The Detailed Citation provides a list of features which are part of the cartographic image. A sample Highway Map legend is provided as a TIF image with all county files, since county files made up of multiple map sheets have had the original map legends clipped out. | |||
| Entity and Attribute Detailed Citation | The following are the data features, or levels, stored in the Microstation CAD database. An asterisk indicates that the feature is not plotted on the final map. Level(#)/ Data Description ------------------------------------------ * 1./Quad corner monuments, Lat. Long. base symbols * 2./Quad borders, flag monuments 3./Border 4./Legend, Key Map 5./Latitude & Longitude Symbols (county maps); MSAS Routes & Legend (city maps) 6./Latitude Longitude Descriptions 7./Information ouside the county border on the county map (Adjoining county names, Adjoining CSAH road symbols, Township & range, Destination arrows and descriptions) 8./State Boundary Line * 9./Section corner monuments (Complete grid) 10./Trunk highway alignments 11./Trunk highway designation symbols 12./County state aid highway alignments 13./CSAH designation symbols 14./County road alignments 15./County road designation symbols 16./Corporate limit dots 17./Drainage text 18./Non-designated street and road alignments 19./Drainage (shorelines and contours) 20./Street names 21./Section coner monuments (municipal maps); section lines and numbers (county maps) 22./County boundary and names 23./Municipal boundary 24./Municipal names and populations, unincorporated place names 25./Route termination arrows 26./Railroad alignments and names 27./Airport runways and names 28./Undocumented street and road alignments 29./Private roads (Street series); Trails (County maps) 30./Township roads 31./Urban boundary 32./Township boundary 33./Township names 34./Overpass symbols, pedestrian bridges 35./Highway enter-exit tamps (Municipal maps); Ramp Symbols (County map) 36./One way arrow 37./Congested area boundary 38./Forest boundary 39./Park boundary 40./Reservation boundary 41./Refuge and wildlife areas 42./Text for parks, forest & reservations; Miscellaneous letter (municipal maps) 43./Swamp 44./Dwellings and farms symbols 45./Industrial and commercial symbols 46./Recreation and public service symbols 47./Miscellaneous symbols 48./Gravel pit symbols 49./Public access symbols; navigation & conservation symbols 50./Historic sites and monuments 51./Triangulation symbols 52./Federal route designations (FAP, FAS, etc.) 53./Distance measurements 54./Pipelines 55./Transmission lines 56./Exit numbers and/or symbols 57./Match line between map sheets 58./Island filled shapes 59./Lake and river filled shapes 60./Interstate highways 61./Interstate road symbols |
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| Section 6 | Distribution Information | Top of full metadata | Top of page | |
| Publisher | Minnesota Land Management Information Center (LMIC) | |||
| Publication Date | 2003 | |||
| Contact Person Information | Norman Anderson GIS Project Manager Minnesota Land Management Information Center (LMIC) 300 Centennial Building; 658 Cedar Street St. Paul, Minnesota 55155 Phone: 651.201.2483 FAX: 651.296.3698 E-mail: norm.anderson@state.mn.us |
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| Distributor's Data Set Identifier | hwy_map1 | |||
| Distribution Liability | Minnesota Department of Transportation Distribution Liability Statement: The Minnesota Department of Transportation makes no representation or warranties, express or implied, with respect to the reuse of data provided herewith, regardless of its format or the means of its transmission. There is no guarantee or representation to the user as to the accuracy, currency, suitability, or reliability of this data for any purpose. The user accepts the data 'as is', and assumes all risks associated with its use. By accepting this data, the user agrees not to transmit this data or provide access to it or any part of it to another party unless the user shall include with the data a copy of this disclaimer. The Minnesota Department of Transportation assumes no responsibility for actual or consequential damage incurred as a result of any user's reliance on this data. Land Management Information Center Distribution Liability Statement: 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. LMIC is not responsible for any interpretation or conclusions made by those who acquire or use it. LMIC 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 LMIC 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 LMIC, 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 these data have been requested from LMIC on magnetic media, CD-ROM or any other physical media, LMIC will deliver this product in the computer-readable format agreed upon with the requestor. LMIC will re-issue these data if they are determined unreadable by correctly adjusted computer input devices, or when the medium is delivered in a damaged condition. Requests for re-issue of this digital data product must be made within 30 days of the date shipped from LMIC. |
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| Transfer Format Name | GeoTIFF, EPPL7 | |||
| Transfer Format Version Number | ||||
| Transfer Size | Varies. See data download page for individual file sizes. | |||
| Ordering Instructions | The online linkage references a summary page about the County Highway Map georeferenced images. This Summary Page includes a listing by county, with links to download each available format. Formats available for download include: 1. Full county GeoTIFF files 2. MnDOT County Highway Map Sheet GeoTIFF files 3. Full county EPPL7 files Alternatively, to purchase a CD of all 87 EPPL7 county files, contact Ken Pekarek at 651.296.1201 or use data order form at http://www.lmic.state.mn.us/EPPL7/EPPLorderForm.pdf |
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| 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 | 04/09/2007 | |||
| Contact Person Information | Susanne Maeder,
GIS Specialist Minnesota Land Management Information Center (LMIC) 300 Centennial Building; 658 Cedar Street St. Paul, Minnesota 55155 Phone: 651.201.2488 FAX: 651.296.3698 E-mail: gisinfo.mngeo@state.mn.us |
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| Metadata Standard Name | Minnesota Geographic Metadata Guidelines | |||
| Metadata Standard Version | 1.1 | |||
| Metadata Standard Online Linkage | http://www.lmic.state.mn.us/gc/stds/metadata.htm | |||
This page last updated: 04/09/2007