Garmin Mapping Software
Several Garmin software solutions are available
for viewing and managing maps installed on their GPSr devices:
MapSource: Compatible with serial port
Garmin GPSr models. Limited functionality with USB port GPSr models.
BaseCamp: Compatible with USB port
Garmin GPSr models. Limited functionality with serial port GPSr models.
HomePort: Compatible with Garmin GPSr
models supporting BlueChart
marine map products.
Use MapSource with the Astro 220 series, and BaseCamp or HomePort with
the Astro 320 and newer.
Download links are available in
Tip: An Introduction to using Garmin GPSr with paper maps
to learn how both can be used together.
Garmin maps are available in a variety of formats. They may be purchased on DVD,
on a pre-programmed microSD card, or downloaded directly from the Garmin
website. Many excellent non Garmin maps are also available
from multiple sources.
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
microSD card. Please note that most mapping products in this format are locked to a single device and they are non-transferable. City Navigator maps in this format can be updated by purchasing a map update, when available.
microSD Card: Pre-programmed microSD cards are ready to use immediately out of the box. Simply unpack the card and insert into your compatible GPSr device. These maps
are not locked to a specific 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
microSD cards. City Navigator maps in this format are not eligible for map updates and mapping from the
microSD card cannot be copied. To obtain updated content, a new card must be purchased.
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
microSD card. All maps in this format are locked to a specific device and they can only be used on the device that they were locked to. BaseCamp can be used to view downloaded mapping detail on your computer. City Navigator maps in this format are not eligible for map updates. If you wish to obtain updated content, a new download will need to be purchased.
Map Types Common Garmin map formats include:
IMG ( *. img)
KMZ ( *. kmz)
User created raster map (not locked to device)
JNX ( *. jnx) Garmin
high resolution satellite raster map imagery (locked to specific device) BirdsEye
FIT ( *. fit)
Flexible and Interoperable data Transfer files save date, time, distance,
calories, speed, ascent, descent and other data
GPX ( *. gpx) GPs eXchange format is a universal open source XML data format used for waypoints, routes, and tracks
GPI ( *. gpi) Garmin Points of Interest ( )
files provide location and other information for popular destinations POI
Map Names *. img map names used by Garmin. Do not use these file names when saving your maps.
for more examples. Garmin Vector Map ID
gmapprom. img | Primary or Pre Installed Map
gmapprom1. img | Secondary Map
gmapprom2. img | Additional 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
microSD card by MapSource
gmaptz. img | Time Zone Map
gmap3d. img | Primary 3D Buildings Map
gmap3d1. img | Secondary 3D Buildings Map
Map Storage Capacity
Your Garmin GPSr is not without limitation. Consider these limits when selecting maps for your
Points per Course
Points per Route 250
Saved Tracks 20
Points per Track 500
Active Tracklog 10,000
Map Install Direct
Not all maps require installation to a host computer before being sent to your Garmin GPSr.
Compatible maps in the following formats can be copied directly to the Astro or
microSD card as shown:
IMG: [GPSr] \Garmin\ or [microSD] \Garmin\
KMZ: [GPSr] \Garmin\CustomMaps\ or [microSD] \Garmin\CustomMaps\
JNX: [GPSr] \Garmin\BirdsEye\ or [microSD] \Garmin\BirdsEye\
FIT: [GPSr] \Garmin\Activities\ or [GPSr] \Garmin\Courses\
GPX: [GPSr] \Garmin\GPX\ or [microSD] \Garmin\GPX\
GPI: [GPSr] \Garmin\POI\ or [microSD] \Garmin\POI\
Map Install PC
Locate a Garmin supported format map you wish to use with your Astro 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 MapInstall
Send Map to GPSr with BaseCamp
Send Map to GPSr with Mapsource
Map Install Mac
Locate a Garmin supported format map you wish to use with your Astro 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
Open BaseCamp and select your new map from the map menu to confirm installation ►
Send Map to GPSr with MapInstall
Garmin Custom Maps
Already have a paper map you want to
use with your Astro? Perhaps you have downloaded a local or state park map in PDF format and wish you could somehow get it into your
Astro? Convert ing paper or digital maps into custom maps you can use with your
GPSr has never been easier!
Garmin Custom Maps Tutorial
Garmin BirdsEye Maps The Astro series includes unlimited access to
Garmin satellite imagery via
Map Manager. Additional map products
are available with subscription.
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
24,000 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.
Enables geocachers to 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
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 24,000, City Navigator) on your
GPSr for a 'birds eye' view of roads, buildings and terrain.
Displays parking and camping areas, trails, points of interest, water sources and more.
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
Garmin POI *. img maps will include unique POI
destinations, individual users may wish to have access to
additional POI destinations. All Garmin GPSr are limited to a relatively
small number of waypoint destinations, but most can index an unlimited
number of POI destinations.
Pre-compiled POI files may include restaurants, safety camera locations,
fuel stations, or other favorite tourist destinations.
User created Custom POI files can include any unique information deemed useful.
Garmin POI Tutorial
Maps 4 Garmin GPSr