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V2.0.8 here !


Be cautious with this new release as you may dislike changes. You should save your previous maps installation for an easier restoration.
  • OSM layer updated (2017/05/23)
  • TOP layer updated with MountainView data (2017/05/23)
  • New rendering style for OSM
  • No more installer for MacOS (not really needed with BaseCamp & MapManager, see installation instruction)
  • Map produced only with open source softwares and custom tools on a Linux computer (no more Windows!)

Known issues :
  • For faster display, disable DEM layer
  • Routing is experimental, it depends on data and compiler capabilities


makeTYP tool is an experimental tool which is able to customize the rendering of your maps on Garmin GPS. First release is available More info...


Bug reports and feature requests.


What's inside ?

Emerald Island GPS Map is based on free open data and tools. Data come from MountainViews, OpenstreetMap, megalithomania and USGS.

MountainViews OpenStreetMap
Megalithomania USGS

MountainViews summits
Data are provided by one of the best hillwalking online resources for ireland. Created by Simon Stewart, MountainViews is the place to begin for enthousiast hillwalkers in Ireland.

OpenStreetMap data
OpenStreetMap is a free open mapping project. Like Wikipedia, anyone can contribute to this great project.

megalithomania - The home of Irish Prehistory - provides some data about Ireland's prehistoric heritage (rock art, ogham stones, stones, tombs, burials, holy wells, fortifications...).

SRTM data
Elevation layer (contour lines)
Shuttle Radar Topographic Mission data (SRTM) used for the map are the one with 1 arc-second resolution (i.e. nearly the same as a 30m grid samples). Increased resolution does not mean necessarily a better precision.
What it means for hill walkers, the contour lines will give you a good idea of the terrain around you with an horizontal approximation of 100-150 meters and +/-10 to 110m elevation error. Do not expect avoiding a cliff with your eyes locked on your GPS screen.

A thought about walking in Irish Mountains

Despite their small height, irish mountains are true mountains. Do not underestimate the difficulties. Before to conquer a summit, check the weather and bring with you clothes you will appreciate to wear if bad conditions catch you. Take enough water and food for all members of your party.the
Remember you that a GPS receiver is only a secondary mean for navigation. Be sure to be able to find your way back home without your GPS (bringing a paper map and a compass may be a good idea).
If you use to walk only on well marked trails, irish mountains may not be well suited for you, the ground can be "a little" wet and slippy, even on steep ground. Nevertheless few summits have some more or less marked trails (and not all are official).

Keep in mind this rule : bring back with you what you bring in mountains. Nature is fragile, preserve it.


By downloading the software, you accept the warranty disclaimer and the software licence agreement.


GPS files From Google Drive
A user reported that installed files seem not to work on Windows 8 and 10. The link below provides IMG file for your Garmin device.
Put IMG files in a folder called Garmin at the root of your GPS SD Card (avoid to use internal memory to prevent any error).

GPS files
MD5 : 32fa52f08d0543b55614eb8984114cff
SHA1 : 69d83d1a2bdcbb9baba71fd76f1d1b455c54fb76

Files for Windows OS From Google Drive
Click to download
MD5 : a4af7f7afd9461c7b4ec4b2a5eb678ed
SHA256 : 603ded98b3b2e764353362d26cf5b0a936627740
Files for MacOS From Google Drive
Click to download
MD5 : 81a111c6f1a37b80ebd01d68ca90f10e
SHA1 : 850e46473ad540906717cf858c25de2febf224fc


V2.0.7 - 10 years edition !

Files for Windows OS From Google Drive
Click to download
MD5 : 8fcbbc84316cdf39b2a8730d1bb42bbe
SHA256 : abed8ed6dae3f00fa251cc4c1594749910704ac1c807fb597f0b796382c619e5
Files for MacOS From Google Drive
Click to download
MD5 : c24d4960912863614cdc1b68505c43d2
SHA256 : 58c9a51669c20b52f5cba29213f5d5438b1b6adef50f337f407ec6ce33cc9e0d



Files for Windows OS From Google Drive
Click to download
MD5 : e8834bb8c8eec5c63564373bf7c45c4c
SHA1 : a026db36426ac5b8763d6df7a9fdd5ca5be4b660
Files for MacOS From Google Drive
Click to download
MD5 : 8c4a4e5f0bc2977c2fe03ece17425f5d
SHA1 : 974adf1dc8d120adb24dc24ac2414ed2e57012ab



Why donate ? Since 2006, Emerald Island map is available for free because it is built with free data according to their authors and my wish. Garmin GPS devices evolve with new mapping features and I cannot test without one. Donations will be used to buy a new Garmin GPS device and, if needed, softwares. Any surplus money will be used for hosting the website, sponsoring other projects about mapping or for a humanitarian association.
If you click on the "Donate" button, you will be redirected to a Paypal form.

Warranty disclaimer and software licence agreement

(Because some people think if anything goes wrong, someone else should pay for their misfortune)

The software refers to all the distributed files that constitute the Emerald Island Map / Emerald Island GPS Map.
Users includes you.
Authors refers to people who contribute to produce data included in the Emerald Island Map and the software itself.

Users of the software must acknowledge hillwalking is a sport with a risk of personal injury and accept the points made here.
The software is provided as is without warranty on its content and its operation. By downloading it, you acknowledge and agree that : users use the software at their own risk for any bad event (including without limitation: injury, death, loss of data, hardware damage, loss of time...). Authors cannot be held responsible for any bad event in users life.

The software includes some open and free data with their own licence. To summarize, the software is for a private usage, it cannot be sold and users are not allowed to make money with it.

OpenStreetMap licence
Condition of use for MountainViews materials
Emerald Island GPS Map is licensed under Creative Commons
Creative Commons Licence

Installation & use

Useful softwares

These software may help you to display maps, to prepare your route and to manage your date to and from your GPS device.


The Emerald Island GPS Map is provided as Garmin files gmapi on MacOS and as an installer for Windows.

Install BaseCamp (display installed maps) MapManager (install maps on MacOS) & MapInstall (install selected maps on Garmin GPS devices).

Launch Emerald-Island-GPS-Map application to create map installation files (gmap files) on your desktop, double click on a gmap file to install it with MapManager.

Launch MapInstall, choose a tiles set with the combo box, select the tiles you want to upload with the drag box on the overview map. Repeat this for each tiles set you need. Once all wanted tiles are selected, upload them.

Windows OS
Install BaseCamp (display installed maps) & MapInstall (install selected maps on Garmin devices).

The easy way :
Install Emerald Island GPS Map with its installer program.

The alternative way (and probably useless) :
Launch the Mac application, copy the files from your desktop to your Windows computer.
Use Extra option in JavaWa GMTK toolbar to import "*.gmapi" in BaseCamp.

Launch MapInstall, choose a tiles set with the combo box, select the tiles you want to upload with the drag box on the overview map. Repeat this for each tiles set you need. Once all wanted tiles are selected, upload them.

(No file provided)

Install QLandkarteGT (compile selected maps into a gmapsupp.img).
Install QMapShak (edit GPS data)

Copy the directory where Emerald Island GPS Map files are installed on a Windows system or in Wine directory (installer for Windows OS works with Wine on Linux).

In QLandkateGT select the tiles you want to upload on your Garmin device (Map/Select Sub Map).
In the sub window "Selected Maps", click on the summary to enable the button "Export Map", then click it to create and save the gmapsupp.img file.

QMapShack is not yet able to upload maps on GPS devices.
QMapShack is able to display the content of a gmapsupp.img.
It is wise to use QMapShack to everything else except uploading maps on Garmin devices.

Maps storage scheme

A Garmin device can store data in two places : Maps shall be stored in a /Garmin directory available in both storages, whereas the GPS software shall be in internal memory.

Preinstalled maps are usually named gmapprom*.img. They are stored in internal memory and they should not be renamed (for performance and display issue).

A supplemental map, i.e. a custom map uploaded by the user, is named by default "gmapsupp.img". It can be stored in either internal or external memory and can be renamed as you want (avoid long name, space, special and accentuated characters if you don't want to experiment any unknown issue).

A same name can be used both in internal and external memories.

Among all data contains in /Garmn directory, here can be found :
The support of all these files depends on Garmin GPS model.

Upload on a USB device

You can upload selected tiles on any USB mass storage, not only a Garmin GPS device. The data will be stored by default in /Garmin.

  1. If you are unsure of what you are doing, make at least a copy of all the content of your GPS internal memory (it may take a long time).
  2. Any previous map set with the same ".img" file name will be replaced by the new one you decided to upload on your USB mass storage.
  3. It is up to you to rename the existing file on your GPS to avoid an unwanted deletion.

In BaseCamp, you can display only one tileset (a map) at a time.

Emerald Island GPS Map is organized as a set of layers. Each layer is a map with a priority display level.
On a Garmin device, you can display more than one map covering the same area, according to their priority display.

For Emerald Islanf GPS Map :
MapInstaller and QLandkarteGT allow to select tiles from more than map. All selected tiles set will be merged in one gmapsupp.img file.

Final words
The map's rendering depends on a TYP style file, like a CSS file for HTML content. Any unprotected map can be customized.

Some rights reserved
Except where otherwise noted, content on this site is licensed
under a Creative Commons Attribution - Noncommercial - No Derivative Works 3.0 License.