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Wyoming Topo Maps


The purpose of this project is to create electronic topo maps for the state of Wyoming for Garmin GPS units with mapping capability. This is an on-going project with additional updates performed as time and resources allow.

Also available:

New Mexico


The mapset is created from freely available GIS data and has the following data layers:

- Interstates, highways, railroads, county, local and forest roads
- Lakes, rivers and streams
- Land use, metro areas
- Elevation contours (40ft intervals)
- Points of interest (summits, mines, falls, dams, cemeteries, towers, populated places, etc.)

Upcoming features in the next revision:

- Clean-up issues with road classifications
- High resolution water data
- Target date of early May

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The mapset covers the state of Wyoming.


Below are a few example screenshots of the maps on a GPS:

GPS screenshot #1 GPS screenshot #2 GPS screenshot #3

Here is a view of a map from within Garmin's MapSource:

GMS screenshot #1


The installation of the maps is fairly simple. The maps can be utilized from within Garmin's MapSource software (on PCs), Garmin's Bobcat/MapInstall software (on Macs) or simply uploaded directly to your GPS unit (using freely available utilities).


The accuracy of the data used to create these maps varies greatly. These maps are to be used for reference purposes only. The author(s) are not responsible for any inaccuracies and no responsibility is assumed for damages or other liabilities due to the accuracy, availability, use or misuse of the data presented. Installation and use of these maps is at your own risk!


For use from within Garmin's MapSource (on PCs), download and execute the mapset installer below. This program will install the map files and register the mapset with MapSource. Within MapSource a new mapset product "Wyoming Topo Maps" will be available in the Product drop down selection list (or from the View | Switch to Product menu option).

Wyoming Mapset Installer (for PCs) (157 MB) Version 1.01 (20 Jul 2008)

For use from within Garmin's Bobcat/MapInstall (on Macs), download and uncompress the converted mapset archive below. Double clicking on the resulting file will initiate MapManager to install the maps for use with Bobcat/MapInstall.

Wyoming Mapset Archive (for Macs) (156 MB)

GPS Usage

The Wyoming Topo Maps mapset should overlay any other mapset present on your GPS unit. To switch between mapsets (if more than one has been loaded to your GPS) simply hide/show mapsets as described here.

Support this Effort

This mapset is free to download and use but if you find these maps useful please consider making a donation to help offset the costs incurred in producing and offering them (software licenses, website hosting, etc.)

There are other ways you can help to support this effort.


Data Sources

The GIS data sets utilized for creating these maps were obtained from the following sources:

Wyoming Geographic Information Science Center (WyGISC)
This clearinghouse provides browsing and query tools for locating and downloading spatial data for the state of Wyoming. Most of the data in this clearinghouse has been compiled by individual projects at the University of Wyoming. The clearinghouse also serves natural resource data from outside organizations/agencies affiliated with the University.

US Census Bureau Topologically Integrated Geographic Encoding and Referencing (TIGER)
In February 1989 the Census Bureau released the first TIGER/Line files, called the Prototype TIGER/Line files. The TIGER/Line files provided the first seamless nationwide street centerline coverage of the United States, Puerto Rico, and the Island Areas and replaced the 1980 GBF/DIME Files (which covered roughly two percent of the land area of the United States).

USGS National Geographic Names Information System (GNIS)
The GNIS is the Federal standard for geographic nomenclature. It contains information about physical and cultural geographic features of all types in the United States, associated areas, and Antarctica, current and historical.

USGS National Elevation Dataset (NED)
The NED is a new raster product assembled by the U.S. Geological Survey. NED is designed to provide National elevation data in a seamless form with a consistent datum, elevation unit, and projection.


Several software applications are used, the main ones being GlobalMapper, which is used for the majority of data manipulation/configuration and cGPSmapper, which is used to compile the data into a Garmin map file.

Last updated: 20 July 2008