Telephone Exchange Service Area Boundaries for Minnesota, 2000

This page last updated: 04/11/2007
Metadata created using Minnesota Geographic Metadata Guidelines


Metadata Summary

Originator Minnesota Land Management Information Center (LMIC)
Abstract This data set provides a statewide view of telephone exchange service areas. It includes four separate layers:

1. Boundaries of more than 700 telephone exchange service areas.
2. Area codes (including the 651, 763 and 952 codes within the Twin Cities).
3. LATA zones.
4. County boundaries.

The data was compiled in cooperation with the Minnesota Department of Commerce (formerly the Department of Public Service). In addition to the digital data, printed maps are also available; see Ordering Instructions.
Browse Graphic View a sample of the data.
Time Period of Content Date 04/2000
Currentness Reference Any changes in telephone exchange service area ownership that were filed with the Minnesota Department of Commerce and completely processed by DOC by the end of April 2000 were incorporated into the data set.
Access Constraints None
Use Constraints 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.

In addition, the data are intended to provide a statewide overview of telephone exchanges and are not to be used for detailed site analysis or as legal documents. To view the official maps for particular exchanges, please contact the Department of Commerce at (651) 296-5120.
Distributor Organization Minnesota Land Management Information Center (LMIC)
Ordering Instructions 1. Online: This data set (GIS formats only) is distributed on the internet by clicking below after Online Linkage. Doing so will tell your browser to start downloading a self-extracting 'ZIP' file which will contain the following:

- An ARC/INFO export (coverage) file (2.6 mb.): mntel00.e00
- Shapefiles (12.5 mb): mn_ac, mn_cty, mn_lata, mnte2000 (.shp, .shx, .dbf)
- Documentation (.htm) file for the data set
- NOTICE.RTF, an important notice about this data set that can be read by most word processing software, and an ascii text version of the same notice (NOTICE.TXT)

After downloading this self-extracting 'zip' file (which will have an 'exe' extension), simply execute (run) the file. (For example, you can double click it from Windows Explorer or File Manager). Doing this will automatically extract the files described above. You can then delete file types that you do not need, if any.

2. CD: The data set is also available on CD for $50. All available formats, both GIS and graphics, are on the CD. Note: many of the graphics files are very large. To order, fill out the order form linked to: http://www.lmic.state.mn.us/projects/telecom.html and mail it to LMIC with payment by check or purchase order (purchase orders may also be faxed). The CD will be sent as soon as payment is received.

3. Printed maps: Printed poster-size maps are also available, 47 inches by 35 inches, color-coded by company that owns each service area. Three versions are available: one showing interstates and federal highways; one showing legislative districts (court-ordered boundaries, 2002); and one without highways or legislative districts. The price is $50 for the first map and $25 for each additional map ordered at the same time. Lamination is available for an additional $25 per map.

To order, fill out the order form linked to: http://www.lmic.state.mn.us/projects/telecom.html and mail it to LMIC with payment by check or purchase order (purchase orders may also be faxed). Please allow 5 business days for delivery of unlaminated maps or ten business days for laminated maps.
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

Telephone Exchange Service Area Boundaries for Minnesota, 2000

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 Land Management Information Center (LMIC)
Title Telephone Exchange Service Area Boundaries for Minnesota, 2000
Abstract This data set provides a statewide view of telephone exchange service areas. It includes four separate layers:

1. Boundaries of more than 700 telephone exchange service areas.
2. Area codes (including the 651, 763 and 952 codes within the Twin Cities).
3. LATA zones.
4. County boundaries.

The data was compiled in cooperation with the Minnesota Department of Commerce (formerly the Department of Public Service). In addition to the digital data, printed maps are also available; see Ordering Instructions.
Purpose The data are intended to provide a statewide overview of telephone exchanges and are not to be used for detailed site analysis or as legal documents. To view the official maps for particular exchanges, please contact the Department of Commerce at (651) 296-5120.

In addition, the telephone exchange service area boundaries, particularly in the Twin Cities metropolitan area, are not necessarily the boundaries of telephone number prefix areas (the 3-digit portion of a telephone number). Prefix areas with defined boundaries no longer exist. Due to changes in switching technology and revised policies that can allow customers to keep phone numbers when they move to a different telephone service area, prefix zones can no longer be easily mapped.
Time Period of Content Date 04/2000
Currentness Reference Any changes in telephone exchange service area ownership that were filed with the Minnesota Department of Commerce and completely processed by DOC by the end of April 2000 were incorporated into the data set.
Progress Complete
Maintenance and Update Frequency As needed
Spatial Extent of Data Minnesota
Bounding Coordinates -97.5
-89
49.5
43
Place Keywords Minnesota
Theme Keywords utilitiesCommunication, telephone exchanges, telecommunications, area code, LATA zone
Theme Keyword Thesaurus ISO 19115 Topic Category
Access Constraints None
Use Constraints 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.

In addition, the data are intended to provide a statewide overview of telephone exchanges and are not to be used for detailed site analysis or as legal documents. To view the official maps for particular exchanges, please contact the Department of Commerce at (651) 296-5120.
Contact Person Information Scott Freburg, GIS Project Coordinator
Minnesota Land Management Information Center (LMIC)
658 Cedar Street, Room 300
St. Paul, MN 55155
Phone: (651) 201-2499
FAX: (651) 296-3698
E-mail: clearing.house@state.mn.us
Browse Graphic View a sample of the data.
Browse Graphic File Description This .GIF file shows a small portion of the printed map.
Associated Data Sets The official maps of each exchange are kept at the Department of Commerce. For more information, contact them at (651) 296-5120.

 
Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy No statistical analysis has been conducted. The Minnesota Land Management Information Center has worked closely with the Department of Commerce to ensure the accuracy of the attribute data. The data was plotted as a map layout in several drafts that were proofread numerous times at LMIC and then by personnel at DOC.

Note: The process of approving changes in telephone exchange service area boundaries and ownership has many stages and can occur over a number of months. The map will only show changes that have received final approval by the full commission and that have been provided by the Department of Commerce to LMIC. Although proposed changes may have been publicized within the telecommunications industry or to the public, they will not be shown on the map until DOC informs LMIC that the change has received final approval.
Logical Consistency Data are topologically structured and verified within ARC/INFO.
Completeness All updates to the original digitized exchange, area code and LATA information from the Department of Commerce have maintained the original scale.
Horizontal Positional Accuracy No statistical analysis has been conducted. The original and official exchange, area code and LATA boundaries are marked on Minnesota Department of Transportation county highway maps (1:126,720 or 1:63,360 scale) housed at the Department of Commerce. The maps used for digitizing purposes had the exchange boundaries marked with a narrow width marking pen directly onto the paper county highway maps. The highway maps were not edgematched and the hand-drawn boundaries did not always meet between maps.
Lineage 1992 data set

In 1992, LMIC began a telecommunications project with the Minnesota Department of Commerce (the Department of Public Service at that time) as part of LMIC's Datanet online data service. DOC had exchange boundaries marked on Minnesota Department of Transportation highway maps (1:126,720 or 1:63,360 scale). LMIC digitized the exchange, area code and LATA boundaries from these maps using EPPL7 version 2 software. A statewide EPPL7 vector file (.dgt) was created, then converted to ARC/INFO coverage format. The datum was NAD27. The last step in this project was the development of the first statewide telecommunications map. This map depicted exchange, area code and LATA boundaries. Exchanges were labeled and shaded by company.

1996 version

In 1996, LMIC contacted DOC and asked for updated exchange, ownership and new 320 area code boundaries. The 1992 telecommunications data set was updated in ARC/INFO to include the new 320 area code, as well as exchange and boundary changes finalized between 1992 and the spring of 1996. The data was converted to NAD83. A new map was produced which also contained a list of all exchanges sorted within and by company.

1998 version

LMIC contacted DOC again for ownership and/or boundary information changes. The new 651 area code was received from DOC as a shape file and was converted to ARC/INFO coverage format. New exchange boundaries were digitized on-screen and incorporated along with the new 651 area code into the 1996 ARC/INFO exchange coverage in NAD83. The coverage was then converted to shapefile, DXF and various graphics formats. A new telecommunications map was developed which included the new 651 area code and exchange data. To make it easier to find individual exchanges, an XY map location identifier was added to the list of sorted exchange names.

2000 version

DOC provided about ten ownership changes that had occurred since the last map was created. DOC also described the lines used to create boundaries for the revised 612 and the new 763 and 952 area codes. In most cases, exchange boundaries were used; however, in some portions, 1990 minor civil division (MCD) boundaries were followed. LMIC staff revised the ARC/INFO coverage and shapefiles to reflect the changes, checking the results against the official map on DOC's website. Two versions of the map were created: one without roads and one with interstates and major federal highways from Mn/DOT's BaseMap CD added as reference information.
Source Scale Denominator 126720
 
Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment ARC/INFO v.7.2.1
Geographic Reference for Tabular Data
Spatial Object Type Vector
Vendor Specific Object Types polygon, arc, node
Tiling Scheme State
 
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 Unknown
Altitude Datum Not applicable
Depth Datum Not applicable
UTM Zone Number 15E
Coordinate Offsets or Adjustments None
 
Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview 1. MNTEL2000 coverage format:

EXCHANGE: telephone service area ID code
EXCHANGE.NAME: telephone service area name
COMPNUM: telecommunications company ID code
COMPANY: telecommunications company name (mixed case)
COMPANY_UP: telecommunications company name (upper case)
LATA: local access and transport area ID code (LATA zones define the areas within which Regional Bell Operating Companies, local companies owned by AT&T, can provide long distance service. The companies are prohibited by federal law from providing telecommunications services between LATAs until they demonstrate that their networks are open for use by competitors.)
AREA_CODE: 3-digit telephone area code


2. MNTE2000 shapefile format:

Attributes are the same as those listed for the coverage format, except that EXCHANGE.NAME is called EXCHANGE_N

Three additional shapefiles are also provided:
1. mn_ac contains just the area code boundaries and attributes;
2. mn_lata contains just the LATA boundaries and attributes;
3. mn_cty contains county boundaries and attributes: CTY_NAME (4-character county name abbreviation, upper case), CTYNAME (complete county name, upper case) and CTY_ID (2-digit county code ranging from 1-87, assigned in alphabetical order).
Entity and Attribute Detailed Citation
 
Section 6 Distribution Information Top of full metadata Top of page
Publisher Minnesota Land Management Information Center (LMIC)
Publication Date 06/2000
Contact Person Information Nancy Rader
GIS Data Coordination Specialist
Minnesota Land Management Information Center (LMIC)
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 mntel00
Distribution Liability 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 data has been requested from LMIC on magnetic media, CD or any other physical media, LMIC will deliver it in the computer-readable format agreed upon with the requestor. LMIC will re-issue data if it is unreadable by correctly adjusted computer input devices or when the media 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.
Transfer Format Name ARC/INFO export (coverage), shapefile, graphics (AI, EPS, GIF, PDF, TIFF)
Transfer Format Version Number
Transfer Size The zip file is 2.9 megabytes.
Ordering Instructions 1. Online: This data set (GIS formats only) is distributed on the internet by clicking below after Online Linkage. Doing so will tell your browser to start downloading a self-extracting 'ZIP' file which will contain the following:

- An ARC/INFO export (coverage) file (2.6 mb.): mntel00.e00
- Shapefiles (12.5 mb): mn_ac, mn_cty, mn_lata, mnte2000 (.shp, .shx, .dbf)
- Documentation (.htm) file for the data set
- NOTICE.RTF, an important notice about this data set that can be read by most word processing software, and an ascii text version of the same notice (NOTICE.TXT)

After downloading this self-extracting 'zip' file (which will have an 'exe' extension), simply execute (run) the file. (For example, you can double click it from Windows Explorer or File Manager). Doing this will automatically extract the files described above. You can then delete file types that you do not need, if any.

2. CD: The data set is also available on CD for $50. All available formats, both GIS and graphics, are on the CD. Note: many of the graphics files are very large. To order, fill out the order form linked to: http://www.lmic.state.mn.us/projects/telecom.html and mail it to LMIC with payment by check or purchase order (purchase orders may also be faxed). The CD will be sent as soon as payment is received.

3. Printed maps: Printed poster-size maps are also available, 47 inches by 35 inches, color-coded by company that owns each service area. Three versions are available: one showing interstates and federal highways; one showing legislative districts (court-ordered boundaries, 2002); and one without highways or legislative districts. The price is $50 for the first map and $25 for each additional map ordered at the same time. Lamination is available for an additional $25 per map.

To order, fill out the order form linked to: http://www.lmic.state.mn.us/projects/telecom.html and mail it to LMIC with payment by check or purchase order (purchase orders may also be faxed). Please allow 5 business days for delivery of unlaminated maps or ten business days for laminated maps.
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 04/11/2007
Contact Person Information Nancy Rader, GIS Data Coordination Specialist
Minnesota Land Management Information Center (LMIC)
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.lmic.state.mn.us/gc/stds/metadata.htm


This page last updated: 04/11/2007