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 Map quality difference XCsoar/LK8000

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Robert Haugen Posted - 10/01/2019 : 18:36:42
I have been looking into the XCSoar Android app, and it looks like the XCSoar provide with much better quality of the map than LK8000 Android app does (Norway south). I have the the setting mountainous on both LK8000 and XCSoar.
Is there a setting on the LK8000 to get the same quality?
12   L A T E S T    R E P L I E S    (Newest First)
Robert Haugen Posted - 16/07/2019 : 11:35:35
Thanks Bo for your files.
The NOR_SOUTH 90 works great on my mobile phone.
Robert Haugen Posted - 15/07/2019 : 19:49:22
Great bo!
I will check this out at first possibility.
bo. Posted - 08/07/2019 : 22:42:29
Hi, I just generated a few maps for Norway using the LKMaps desktop application: https://www.postfrontal.com/forum/topic.asp?TOPIC_ID=8500&whichpage=1

The maps were generated at max to min resolution (90, 150, 250, 500 m) for the rather big map areas already defined as NOR_SOUTH and NOR_N in the map download section: http://lk8000.it/lkmaps/NOR.html

The resulting files are from 6 MB - 200 MB (NOR_SOUTH) and 18 - >500 MB (NOR_N).

I tested the largest NOR_SOUTH file on a Galaxy S7, and to my surprise it seems to work ok despite the size.

Thanks for adapting the desktop application to allow map generation for areas beyond 60 degrees north! It seems to work very well. Only a few water areas are missing in the fjords, but I don't think it matters much.

I will keep the files available for a while here:
https://www.dropbox.com/sh/a5h85c12nsbzvd8/AADQHYjZyeStZoaCY94K6kQAa?dl=0

There are some screenshots for comparison of the resolutions as well.

Perhaps someone could add some of these files to the official download area for LK8000?
ToninoTarsi Posted - 14/01/2019 : 16:19:16
Thanks Bruno,

Version 1.0.2.00 is available and now we use http://viewfinderpanoramas.org as source website that have a mixed-source data that covers all the globe.

Tony

brunotl Posted - 13/01/2019 : 16:19:18
another srtm data source with world coverage :
http://viewfinderpanoramas.org/Coverage%20map%20viewfinderpanoramas_org3.htm
ToninoTarsi Posted - 13/01/2019 : 14:05:49
quote:
Originally posted by bo.

Excellent!

Robert, I hereby appoint you as volunteer ;-)

What dataset is used beyond 60 N (and 56 S)? SRTM stops there as I understand it.

ASTER?



Yes .. you are right. Bewonf 60 my tool run fine but data are 0 for lack of SRTM data there. Aster GDEM can be a solution there but be aware that GDEM has a lot of artifacts.
Processing chain can be :
- Download GDEM
- Mosaic it and convert into Esri grid asc file ( using free QGIS for example)
- Convert it into DEM using this tool : https://github.com/ToninoTarsi/GIS2LKMAP

Tony
Robert Haugen Posted - 12/01/2019 : 12:28:19
quote:
Originally posted by ToninoTarsi

Producing 90 meters maps worldwide will be very time consuming and server space consuming .. but volunteers to do this are welcome :-)
Easier solution is to use LKMaps_Desktop that can produce maps everywhere (even > 60 deg .. I just produces Svalbard :-) ) in just 5 minutes.

Tony




The first problem is that there is missing mapset area for my region in Norway (the northwest alps). The map is only reaching 1/5 of Norway from south to North. Do you know how to collect the complete mapset for Norway?

However, to be able to test mapsetting I needed to find a random area with mapset.
After creating terrain file 90m covering 50% Norway with LKmaps and tweaking the "mountanous" contrast/brightness settings 100/0 it got better. The filesize is 190mb. But IMHO the XCsoar map is more detailed showing the valleys and mountains better. See files to compare.


I will not create a big subject around this, but I'm just exploring the potential. I am not any expert what so ever in this platform.


https://www.dropbox.com/sh/ljrsn9ptkw543ix/AADsecbaOHLqUEXEAf_17Vsja?dl=0
bo. Posted - 11/01/2019 : 20:54:13
Excellent!

Robert, I hereby appoint you as volunteer ;-)

What dataset is used beyond 60 N (and 56 S)? SRTM stops there as I understand it.

ASTER?
ToninoTarsi Posted - 11/01/2019 : 10:38:26
Producing 90 meters maps worldwide will be very time consuming and server space consuming .. but volunteers to do this are welcome :-)
Easier solution is to use LKMaps_Desktop that can produce maps everywhere (even > 60 deg .. I just produces Svalbard :-) ) in just 5 minutes.

Tony
bo. Posted - 11/01/2019 : 09:50:05
Hi, that would be much appreciated. Please remember the lack of DEM data north of 60 N in the dataset normally used. This has been solved previously for Norway, I'm not sure how much effort it was.

Did XCSoar solve this properly yet?
AlphaLima Posted - 10/01/2019 : 21:57:54
For Norway there is only coarse maps avialable in the download section, but you can generate more detailed maps yourself as Tony mentioned above.
@Tony: mayby we can generate some more detailed maps for scendinavia and add it for LKMaps?

ToninoTarsi Posted - 10/01/2019 : 21:36:15
What do you mean with quality ? Any screen shot ?
LK8000 provides worldwide maps available here : http://www.lk8000.it/download/maps.html
and a Desktop application for making updated personals maps (with a resolution up to 90 meters) : https://www.postfrontal.com/forum/topic.asp?TOPIC_ID=8500
Tony

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