Last month, Leszek Pawlowicz of Free Geography Tools hinted at a new project code-named MOAGU. He may ascribe a different meaning to the acronym for legal reasons, but let’s call it what it is — MOAGU is the mother of all Garmin utilities. What Leszek has created is a utility that will place a USGS topo map on your Garmin GPS. Actually, it will put any scanned, georeferenced map on your Garmin. It won’t work on just any Garmin mapping handheld yet; I haven’t been able to get the maps on my Colorado 300, though I’m hoping some of our more technically inclined readers can figure that one out.

I have used it on my Garmin 60CSx and I have to say that Moagu rocks! This really is revolutionary. Handheld users have been asking for 1:24,000 scale USGS maps for their GPS units for years. The DeLorme PN-20 and Magellan Triton series have implemented this, more or less successfully (respectively), but we haven’t had an easy solution for Garmin devices until now.

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Garmin MapSource TOPO U.S. 2008 provides topographic map coverage of the entire United States and Puerto Rico. Ideal for the geocacher, hiker, mountain biker, etc., it is available on DVD or micro-SD cards. Considering the high cost of the micro-SD regional cards though, I’d recommend that you pay a little more and buy the DVD of the entire country.

Garmin TOPO U.S. 2008 allows you to transfer topo maps to compatible Garmin mapping receivers; these maps cannot be loaded to non-mapping units, such as the basic eTrex H. TOPO U.S. comes with and is used through Garmin’s standard MapSource interface, which also allows you to transfer waypoints, routes and tracks to and from your GPS receiver. This makes TOPO U.S. 2008 very useful planning trips right on your PC.

It does not allow you to auto-route (generate turn-by-turn directions on trails or streets). Routes created on TOPO U.S. 2008 produce straight-line, "as the crow flies" segments. They do not follow the trail, but go from waypoint to waypoint. Also, please note that while you can load both TOPO U.S. 2008 and City Navigator maps to your compatible Garmin receiver, you can’t view both at the same time.

One other point — this product is not "locked," so the maps can be loaded to multiple units.

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UPDATE: This product has been discontinued. Read my review of Garmin’s new nationwide Topo US 24K maps.

One of the frustrating things about backcountry use of GPS is having to live with "as the crow flies" routing. That’s not so bad when you’re off-trail, but on trail, I’d prefer my GPS tell me that its five trail miles to the destination rather than three "as the crow flies" miles. The crow can fly, but I can’t.

On one of my last outings, I had a chance to try out Garmin’s US TOPO 24K which shows contour intervals closer to USGS 1:24,000 scale maps than their USA TOPO (1:100K) product, hence the name. During one outing, I happened to be on the dividing line between these two coverages, as captured in the screen shot to the left.

Clearly, this enhanced level of detail is desirable, but having routable trails excites me just as much. I couldn’t trick my GPS into capturing a screen shot of a route, but the image to the right  comes from the MapSource desktop. You can see that the software routed along the highway and a trail, but that it had to do "line of sight" routing where one trail was not on the map. It was really nice to know just how far I had to go to the next junction.

The formal name of this product is US TOPO 24K – National Parks, and you can purchase it for the eastern, central or western U.S. But as I discovered on this trip, it covers more than just national parks. The images shown here were not captured in national parks, but in the San Bernardino National Forest.

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