About the DEM Relief Maps
If you want to enable relief shading / shaded maps on your GPS device from 5km zoom level or higher - I provide here for OpenMTBMap members downloadable .img files for each country or continent.
I worked quite some time to optimise the speed/quality of the rendering on the devices - however note it will slow down map panning on your device.
In General you can simply use the continent .img files - only for Asia it is pretty big (and has a lot of tiles - so make sure to not go over the 2048/4096 tile limit on your device).
I've added the files for each country as well for those who just want to try it out or prefer very small download.
Screenshots from DEM on Oregon 600 - only Austria in this example. From Left: 3km scale (DEM not shown with Auto mode), 5km, 8km and 30km.
How to Use
Right now this is first version - it should work but I hope to still improve them a bit. To use them simply copy the .img file to the /garmin directory on your mSD card, then activate the mtbmap-DEM-XX (XX standing for abbreviated country) map on your device.
Attention in night mode the relief will never be shown. So if you try it out at night (or without GPS reception sometimes) - you need to deactive the night mode.
Device Setup
You should setup your device to show DEM to auto mode. You can do this in
Map Settings --> Advanced Setup -->Shaded Relief: Auto
If shaded Relief is set to Auto - it will show from 5km zoomed out to infinite (I hope to restrict this in future to 30 or 50km). Always make sure to have the devices Basemap active - it will really speed up map panning when zoomed out a bit.
3 Different Versions
I have only properly tested the first - standard Version - which is also the one I recommend to use. If you however want to try out a DEM shaded relief map for your device with higher detail level / better resolution you can try out the Experimental versions. They are available in Higher Detail, and in Highest Detail.
Note you should only send one version to your GPS device at a time from a single country. Else your device may not boot. However for testing you can e.g. use the Standard Europe DEM Overview map, and the Higher Detail DEM map from a single country like Germany or Alps.
Note also that the Higher Detail, and Highest Detail experimental versions have not been tested thoroughly - and they mainly make sense if you set Map Settings --> Advanced Setup -->Shaded Relief: Show Always.
If you want to know the last update time, MD5 Checksum or exact filesize of a download - just look into the MD5 link that follows each download.
Contourlines/DEM data:
The altitude data for the contourlines is from varying sources in the following priority (if available):
- LIDAR data from open government data and other openly available sources - collected and converted to hgt format by - Sonny - https://data.opendataportal.at/dataset/dtm-austria This data is very very high quality and resolution - there is no better open data available according to my knowledge.
- ALOS World 3D30 - überall zwischen N60° und S60°
- SRTM 1" v3.0 - very rarely for some tiles missing in ALOS data - also only between N60° and S60°.
- Viewfinderpanormas 1" - then 3" - above N60° / below S60° as there is no SRTM data nor ALOS or LIDAR Data avialble.
- SRTM v3.0 by NASA 3" v3.0 (very very rarely, 8 tiles only)
more exact info which data is used where - inside the copyright.txt files.
Free Sample download of Austria if you have no OpenMTBMap membership:
- Standard Detail: DEM -Austria (MD5)
- Higher Detail: DEM -Austria (MD5)
- Highest Detail: DEM -Austria (MD5)
Hallo,
Auf welches Maplayout sind die DEM Karten eingestellt? Gibt es eine Möglichkeit das Layout z.B. auf Hiking umzustellen?
Beste Grüsse
Dem Karten haben kein Layout. Die erzeugen ja nur die plastische Karte, wenn weit herausgezoomt und die Option aktiviert. Wie stark die Schattierung ist bestimmt Garmin
Ah, ok, danke für die sehr schnelle Antwort. Die DEM Karte wird also zusätzlich zur eigentlichen Karte der jeweiligen Region auf das Garmin gespielt, richtig?
Ja, ist nur für DEM ab etwa 10 oder 20km Maßstab da.
I would like to download all of them, but I cannot simply do it via command line since the “I am a registered member”-cookie does not get transmitted then.
Is there an archive which contains all in one file?
Regards!
No – just download the continent DEM relief shading maps – that way you only need one per continent.
OK — but I would like to have it at country granularity level.
But I found a way to automate it (of course that does not bypass login requirement; works still only when I am logged in) by providing the cookie to `wget`, downloading one-by-one in order.
Hallo Felix,
die Fenix 6X kann die aktuelle Höhe per DEM information kalibrieren.
Wenn ich die “europe_ov” verwende kann die Uhr auf das Höhenmodell dort zugreifen?
Oder sind die Höhenangaben auch in den “normlen” Karten bereits integriert?
Eine Schattierung stellt die Fenix6X ja nicht dar (vermutlich weil die Auflösung zu klein ist und die Anzahl an Farben dafür nicht ausreichend wäre…)
Daher die Frage, ob es sinnvoll ist die europe_ov zu kopieren, oder nicht….
Vielen Dank,
Thomas
Ja Schattierung kann die Fenix 6x zum Glück nicht – wäre absolut sinnlos. ist es ja schon bei den Normalen Karten außer sehr weit herausgezoomt. Die ov ist nur für weit herausgezoomt – schnellere Anzeige der Schattierung. Das Höhenmodell an sich ist in den normalen Höhenlinien enthalten (also nur wenn du 10 oder 20m Höhenlinien aktiviert hast).
Super – danke für die Klarstellung (und das wie immer schnelle Antworten:-))
Hello,
I am a little bit confused about contourlines,shaded relief and Dem.
First Question:
I installed, on my device 66sr,using basecamp, openmtbitaly which have the contourlines already integrated.
The map show Shaded relief using Worldwide Dem Basecamp Nr.
I downloaded the Premium Dem relief for my country, Contours_Italy.img, copied it to the /garmin directory.
I can’t activate the mtbmap-DEM-XX cause there isn’t in hte list. There is only Worldwide dem basecamp.
2nd Question:
Are the Dem file used to calculate total ascet during/after activity?
Thanks for your cooperation
Sorry – contours_italy.img is not the relief map! Of course you cannot activate it – because Italy already comes with contourlines integrated.
The relief maps work a bit different on each device – and now they are not used for total ascent/descent – could be used for preview ascent on very long routes (over 70-100km) – again depending on the device.
What they definitely do – they allow you to show shading for further zoomed out maps – but this is usually not helpful anyhow. I offer them because some people may have use of them – I never use them myself.
Hi,
I have download china-ov.img, japan-ov.img & taiwan-ov.img recently. However, only china-ov.img appeared in the map list and it works well from scale 12km to 5km. However, for the other two taiwan & japan, both didn’t even appear in the map list. I am using eTrex Touch 35 APAC with the most updated firmware.
Please help.
Many thanks.
I think you can only use on -ov.img at a time. Just use asia-ov.img instead.
As you said it works well with asia-ov.img individually. Thank you very much!