Northwest Trails
Released August 15, 2008 (revision history)
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Download Northwest Trails for PC (15.8 MB) |
| Download Northwest Trails for Mac (15.5 MB) |
You can contribute to this project!
Questions? Comments? Ideas? Join the Northwest Trails discussion in Groundspeak's Northwest Forum!
In short, Northwest Trails is a mapset of trails designed for upload to any map-enabled Garmin GPS receiver. It is more than just a mapset, though; it is also a community effort initiated to record and collect GPS data for trails in the Northwest (Washington, Idaho, Oregon, Montana, Wyoming, British Columbia and Alaska) and provide that data for general public use.
My GPS usage started out in 1995 as a means to map mountain bike trails in my area. Over time I collected a large quantity of track data recording various paths and routes.
Tracks are very helpful when it comes to navigating a route, but the biggest problem with having a multitude of them is that no GPS can accommodate more than a few at a time. Thus, you need to know beforehand what route you want to take and, if you are talking about even a modestly sized network of trails, you have to decide which trails to cull in order for things to fit into your receiver. That's when I started thinking about custom maps for my receiver.
With custom maps like Northwest Trails, there is no longer a need to limit the number of trails loaded on the GPS (the maps use only a portion of map memory rather than a limited number of dedicated slots like tracks do). I set out making these maps for my own use and before long realized that a lot of other people could probably use them, too. That's why I started this project.
Northwest Trails is made to be "transparent", which means that when loaded with other Mapsource products (or the GPSr base map) the trails appear as data laid over the top of the other maps. Northwest Trails can also be loaded directly to the GPSr on its own. Custom type definitions are used to help distinguish trail types and make them easier to see on the map than the default trail lines. These custom types include:
| TRAIL TYPE | DESCRIPTION | APPEARANCE | |||
| Trail | main trails | red dotted line |  | ||
| Minor Trail | game traces, boot trails, overgrown paths | thin red dotted line |  | ||
| Paved Trail | asphalt, concrete and other hard-surface trails | maroon dotted line |  | ||
| Unpaved Road | wide routes that do or could accommodate a vehicle | maroon dashed line |  | ||
| Motorized Trail | trails open to motorcycles and/or ATVs | red boxed line |  | ||
| Snow Trail | cross-country ski or snowshoe trails | cyan dotted line |  | ||
| Snowmobile Trail | groomed or ungroomed snowmobile trails | cyan boxed line |  | ||
| Snow and Summer Trail | trails maintained year-round for seasonal uses | violet dotted line |  | ||
| Snowmobile and Summer Trail | trails maintained year-round and open to snowmobiling | violet boxed line |  | ||
The mapset currently covers the states of Washington, Idaho, Oregon, Montana, Wyoming and Alaska along with a spattering of trails in British Columbia (see coverage map below). However, since government GIS sources of unknown quality and completeness are the source of much of this data, there is a significant need for not only additional data but also verification of virtually all of these trails by GPS-wielding users. The intent is, over time, for the coverage of the mapset to expand to include thorough GPS-verified coverage of all trails located in the Pacific Northwest.
Below are a few example screenshots of the maps on a Garmin Colorado 400t. The first image shows the Riverside State Park area in Spokane with Northwest Trails layered on top of City Navigator 2008. The second shot shows the Preston Railroad Trail on Tiger Mountain near Issaquah with Northwest Trails layered on top of Topo 2008. The third screenshot shows the Tiger Mountain trail network as it appears in the Colorado's 3D view.
Here is a view of what Northwest Trails looks like from within MapSource. Note that the trails will not appear until you zoom in to the 2 mile zoom level or below. (This is when the MapSource map detail setting is at its default of "Medium"; setting the map detail level higher or lower will change the zoom level at which the trails appear.)
The installation of Northwest Trails is straightforward. It can be utilized from within Garmin's MapSource software (on PCs), Garmin's Bobcat software (for Macs) or 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 the zip file from the link at the top of this page, unzip it, and then execute the mapset installer. This program will install the map files and register the mapset with MapSource. Within MapSource a new mapset product entitled "Northwest Trails" will be available in the Product drop down selection list (or from the View | Switch to Product menu option).
For use with Garmin's Project Bobcat (on Macs), download the .tgz file from the link at the top of this page, unarchive it into the resulting .tar file, then unpack that to a .gmapi file. This file can then be installed into Bobcat with MapManager and onto the GPS receiver with MapInstall.
The Northwest Trails mapset should overlay any other mapset present on your GPS unit. It is important to note that when you upload maps to your receiver, the existing mapset on the unit will be deleted. This means that if you want Northwest Trails to overlay City Navigator maps, for example, you will need to upload the chosen City Navigator maps along with Northwest Trails all at once. To switch between mapsets (if more than one has been loaded to your GPS) simply toggle the hide/show settings for the desired mapsets on your receiver.
If you find Northwest Trails useful and would like to see more data added, or new mapsets created, please consider supporting this effort in one (or more) of the following ways:
All feedback (comments, corrections, questions, etc.) is welcome and encouraged. Please direct all feedback to the email address shown at the top of this page. I try my best to reply to every email I receive but it is not always possible. I do read every email and appreciate the feedback.
If you like this mapset please let others know about it. More people using and supporting this effort means more additions and corrections are possible.
The core of all of these mapsets is data. The real heart of that data is tracks recorded out in the field with GPS. Since data of this accuracy is hard to come by from government and other agencies, and I cannot possibly get out there and hike all of the trails of the Northwest (although I'd like to try!), that's where you come in! Any track data you can supply is needed and most appreciated, and will be integrated into the Northwest Trails mapset for everyone to use.
If you would like to collect and submit your track data to the project, please follow these pointers so that your effort can be as useful as possible:
Since it will be a while until we record all of the trails in the Northwest, it is useful to include other sources of trail data to help fill in the holes in the meantime. Thus, any information, links, etc. to any detailed trail maps or GIS datasets would be greatly appreciated. In order to use such data in the Northwest Trails project, the data should be:
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.).
Several software applications are used in the production of Northwest Trails. ArcGIS is used to merge and cull datasets and edit fields. GlobalMapper is used for the majority of data manipulation and for digitizing of paper maps. cGPSmapper is the primary tool for compiling the data into a Garmin map file.
Copyright © 2008 Jon F. Stanley
