Delivery Method

Garmin maps are available in a variety of formats. They may be purchased on DVD/CD ROM, on a pre-programmed µSD card, or downloaded directly from the Garmin website. Many excellent non Garmin maps are also available online from multiple sources.

  • µSD Card: Pre-programmed µSD cards are ready to use immediately out of the box. Simply unpack the card and insert into your compatible GPSr device. These maps do not need to be unlocked to your device which allows you to move the card between multiple units as desired. BaseCamp can be used to view mapping detail on your computer from compatible pre-programmed µSD cards. Mapping data from the µSD card cannot be copied.

  • DVD/CD ROM: Maps purchased in this format will require a computer to use. The installation process will install the maps and BaseCamp application to your computer. BaseCamp can then be used to send maps to either your device or µSD card. Please note that most mapping products in this format are unlocked to a single device and they are non-transferable.

  • Download: Maps purchased in this format can be downloaded directly from the Garmin website. Downloaded maps can be sent to either your GPSr unit or µSD card. All maps in this format are unlocked to a specific device and they can only be used on the device that they were unlocked to. BaseCamp can be used to view downloaded mapping detail on your computer.

Map Types

BaseCamp currently supports the following map formats:
  • IMG (*.img) Proprietary Garmin vector map
  • KMZ (*.kmz) User created raster map (not locked to device)
  • JNX (*.jnx) Garmin BirdsEye high resolution satellite raster map imagery (locked to specific device)
  • GPX (*.gpx) GPs eXchange format is a universal open source XML data format used for waypoints, routes, and tracks

Map Names

These are the default map names used by Garmin GPSr. Do not use these file names when saving your maps.
  • gmapprom.img | Primary or Pre Installed Map
  • gmapprom1.img | Secondary Map
  • gmapbmap.img | Device Base Map
  • gmapoem.img | OEM Installed Map (can not be disabled in Map Settings)
  • gmapsupp.img | Map written to device or uSD card by MapSource, BaseCamp or MapInstall
  • gmaptz.img | Time Zone Map
  • gmap3d.img | Primary 3D Buildings Map
  • gmap3d1.img | Secondary 3D Buildings Map

Map Install [USB]

Not all maps require installation to a host computer to be available in BaseCamp. Maps in the following formats can be copied directly to a GPSr, µSD card, USB Drive (Virtual GPSr) or other removable media as shown:
  • IMG: [Device]\Garmin\
  • KMZ: [Device]\Garmin\CustomMaps\
  • JNX: [Device]\Garmin\BirdsEye\
  • GPX: [Device]\Garmin\GPX\

Map Install [PC]

Locate a Garmin compatible map you wish to use with BaseCamp and download the Windows version to your computer.

Install Map to PC
  • If the downloaded map file is a *.zip archive, you must unzip the file to extract the *.exe map installer
  • Close any open mapping software programs (Map Source, BaseCamp, etc.)
  • Run the *.exe map installer
  • When prompted, choose map installation options as desired
  • For best results, do not change the default map installation directory
  • Allow the installer to complete the map installation
  • Exit the installer
  • Open BaseCamp and select the newly installed map from the drop down menu to confirm availability

Send Map to GPSr with BaseCamp

Map Install [MAC]

Locate a Garmin compatible map you wish to use with BaseCamp and download the Mac version to your computer.

Install Map to Mac
  • If the downloaded map file is not in *.gmapi format, double click the file to launch your default archive utility and extract the map from the compressed archive
  • Double click the *.gmapi map file, invoking Garmin MapManager
  • The selected map will be displayed under "Install these map(s)?"
  • Select "Install", and then "Close" after installation is completed
  • MapManager will display a list of all Garmin compatible maps installed on your computer
  • Close MapManager
  • Open BaseCamp and select your new map from the map menu to confirm installation

Send Map to GPSr with MapInstall

Unlocking Maps

  • Some Garmin map products need to be unlocked before you can use the detailed map data.
  • If your product needs to be unlocked, you will find an unlock code or a product key/coupon code with the packaging.
    • Unlock Code
      • An unlock code is 25 characters and is printed on a yellow piece of paper or on the product packaging.
      • It unlocks all maps associated with your map product.
      • Unlock codes are included with Garmin devices that also include mapping software.
        1. In BaseCamp, click Utilities > Manage Map Products.
        2. Select the Unlock Regions tab, and click Add.
        3. Enter your 25-character unlock code
        4. Enter a comment (optional).
        5. Select OK.
        6. The unlocked map product will appear in the list on the Unlock Regions tab.
    • Product Key
      • A product key/coupon code is 8 characters and is printed on the Unlock Certificate.
      • It unlocks a map region of your map product.
      • Product keys/coupon codes are included with software that is packaged separately from a Garmin device.
      • An Internet connection is required for the following procedure.
        1. In BaseCamp, click Utilities > Manage Map Products.
        2. Select a map product from the list, and click Unlock Online.
        3. The Unlock Maps page loads in your Web browser.
        4. If the Garmin Communicator Plugin is not installed on your computer, follow the instructions on the Unlock Maps page to install the Garmin Communicator Plugin.
        5. Connect your GPSr device to your computer.
        6. Click Find Devices.
          • Select your device from the drop-down list, if necessary.
          • The unit ID of your device appears in the Unit ID field.
        7. Enter the serial number found on your device.
        8. Enter the 8-character product key/coupon code found on your Unlock Certificate.
        9. Click Unlock Map.
  • Newer map products may have additional requirements for unlocking. Follow the unlocking instructions included with your map product.

Garmin Custom Maps

Do you have a paper map you want to use with your Garmin GPSr? Perhaps you have downloaded a local or state park map in PDF format and wish you could somehow get it into your Garmin GPSr? Converting paper or digital maps into custom maps you can use with your Garmin GPSr has never been easier!

Garmin Custom Maps Tutorial

Garmin BirdsEye Maps

Annual subscription based service providing unlimited access to Garmin satellite imagery and/or detailed USGS/NRC topographic raster maps for use with your Garmin GPSr and BaseCamp.

BirdsEye Satellite
  • Transfer an unlimited number of satellite and aerial image segments to your device with free BaseCamp software.
  • High-resolution sub-meter color satellite imagery captures the world in brilliant clarity and detail.
  • Allows you to layer the Garmin vector maps on your handheld (such as TOPO 100K, TOPO 24K or City Navigator®) with BirdsEye Satellite Imagery for a real-life view of roads, buildings and terrain.
  • Makes it easy for hunters to perform preseason scouting, determine placement of stands and locate game pinchpoints.
  • Helps hikers and campers find trails/trailheads and clearings for camping areas.
  • Lets geocachers determine the terrain type around a cache and identify parking areas close to the caches.
  • Allows travelers to view tourist hot spots and landmarks from an aerial view to make excursions memorable without getting lost

BirdsEye TOPO
  • Provides highly detailed 1:24,000* scale raster USGS maps and 1:50,000 scale raster NRC maps.
  • Features an unlimited amount of downloadable raster maps for 1 year using BaseCamp software.
  • Layer Garmin vector maps (TOPO 100K, TOPO 24K, City Navigator) on your Garmin GPSr for a 'birds eye' view of roads, buildings and terrain.
  • Displays parking and camping areas, trails, points of interest, water sources and more.

BirdsEye Select
  • Highly detailed (1:25,000 or 1:50,000) raster map imagery
  • Coverage for Germany, France, Great Britain, Ireland, Austria, Italy and Switzerland
  • Each single purchase allows you to select and purchase custom sections (a set amount of square kilometers per region) of BirdsEye Select raster imagery for transfer to your Garmin handheld device.

Garmin BirdsEye Tutorial

Maps 4 Garmin GPS

Not all maps are created equal, and no one map should be considered inferior or superior to another map based solely on price. In fact, some of the most useful maps you are likely to use with your Garmin GPSr are freely available from numerous map hosting websites. When you find a free map you like, consider making a donation to the map author to motivate them to continue the development of their maps for your benefit and enjoyment!

Here are some great places to start looking:
  • Garmin (World Wide) On The Road, On The Water, On The Trail, In The City, or On The Green, Garmin has you covered!
  • Garmin Connect (World Wide) A repository of user created tracks to help you plan your next journey!
  • GPSFileDepot (World Wide) An extensive selection of some of the finest Garmin GPSr compatible maps available
  • Southwest Trails (USA) A crowdsourced compilation of trail maps covering the southwest USA
  • (USA) A frequently updated collection of highly detailed maps for the Pacific Northwest
  • Garmin OpenStreet (World Wide) Create free routable OpenStreet maps for your Garmin Montana
  • OpenStreetWiki (World Wide) Pre-compiled routable Garmin IMG maps from around the world
  • OSM Maps (North & Central America) Pre-Compiled routable Garmin IMG maps updated on a monthly schedule
  • Freizeitkarte Project (Europe & USA) Frequently updated OSM based routable maps for European destinations
  • OSMAustralia (Australia & New Zealand) OpenStreetMap IMG format map data for your Garmin GPSr
  • ShonkyMaps (Australia) Topographic map coverage for all of Australia
  • Trails Co-Op (USA) A compendium of over 35,000 trails ranging from National Parks and Forests to local, backyard mountain bike trails.
  • AllTrails (USA) Rediscover the outdoors! Explore more than 40,000 user submitted trails, reviews and photos.
  • CalTopo (USA) Choose from multiple data sources to generate custom KMZ maps for your Garmin GPSr.