Standard bitmap Moagu maps, and maps created with the BMap2MP utility, have been tested and shown to work well on Garmin units in the 60C(S)x and 76C(S)x family. These include:

Garmin 60Cx

Garmin 60CSx

Garmin 76Cx

Garmin 76CSx

Garmin Astro

Though I haven’t seen it personally, customers have bought and used Moagu with the etrex Legend HCx and eTrex Vista HCx, and say that it seems to perform well on these units. While owners of this model should still check out the demo version of Moagu to make sure they feel the same way, I’m adding both of these to the list of compatible units:

Garmin eTrex Legend HCx

Garmin eTrex Vista HCx

Moagu maps work with the older versions of the 60C and 76C series (60C, 60CS, 76C, 76CS), as long as they have the latest firmware installed; one independent field test suggests that initial draw times with these older units are slower than with newer models, but that once drawn, they will also keep up with your position even at mountain biking speeds.

Own one of the new Colorado/Oregon/Dakota/Montana/62/78 models? Standard Moagu maps will not work with these units, but for these newer models, you actually have two superior options that are easier to work with, and display maps much more quickly. First, these newer Garmin models support raster imagery as Custom Map overlays in the KMZ image overlay format. Click here for info on G-Raster, a free/inexpensive program that converts georeferenced raster imagery into a Garmin-compatible KMZ format. However, there are limitations on the maximum size/extent of Custom Map imagery that you can install at a single time on a unit.

Second, there’s a free utility called BMap2MP that can convert raster maps into vector Garmin maps that should be compatible with these units. Unlike Custom Maps, there are no limits on the number of maps you can install on your unit except for memory space. BMap2MP is a command-line utility, and using it requires substantial technical knowledge. But Moagu has a graphical front-end for this utility that makes the process a lot easier. Download this file to install in MapSource a sample map created using BMap2MP/Moagu, and try it out on your Garmin GPS unit. Here are two screenshots from a Garmin Oregon unit showing the sample map:

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HT to Michael Woessner for the screenshots.

Moagu’s BMap2MP utility also has settings optimized for USGS topographic maps; you can download a sample mapset created this way for installation into MapSource/BaseCamp from this link. For Colorado/Oregon/Dakota/Montana/62/78 series Garmin models, you can also download a single .img file for this topographic map that you can copy directly into the Garmin folder on your GPS unit to install it directly, without the need to install it in MapSource or BaseCamp. The zip files also include a waypoint located within the map region, to make it easier to find on your unit. Here are some screenshots from my Garmin 62s, showing USGS topographic maps created with the BMap2MP utility as they actually appear on a Garmin:

While not as high-quality as Custom Map overlays, these maps don’t have the same restrictions in terms of size/extent. So while you could squeeze about 6 topographic maps worth of imagery into your Garmin before hitting Garmin’s size restrictions, there’s no limit to the number of BMap2MP topographic maps you can load other than your GPS unit’s memory storage space. Two tutorials in the help file walk you through the process, step-by-step, from downloading a free topographic map to installing it on your GPS unit.