Could mkgmap be extended to create an empty dem dist layer?
If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map? Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful. Greetings Felix -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
Hi Felix, it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map? Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful. Greetings Felix -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
I prefer to have Basemap - but I know many people delete it by accident or don't activate it - and I just tried a gmapsupp DEM map will also give shading to overview map. And yeah - maybe call it --dem-empty-dist so you would have e.g. --dem-dists=19884,39768,53024,106048 --dem-empty-dist=212096 or --dem-dists=19884,39768,53024 --dem-empty-dist= 106048 not sure what values will work best. And yes I would expect only uknown or undefined heights should do the trick - but of course I do not know. With garmins usual approach i do guess it's possible to create it in a way that it switches off at some zoom level by inserting empty data. On 17 April 2018 at 12:40, Gerd Petermann <gpetermann_muenchen@hotmail.com> wrote:
Hi Felix,
it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default?
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map?
Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful.
Greetings Felix
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
Hi Felix, attached is a patch that implements option --x-dem-empty-dist as discussed. I tried with --dem-dists=19884,39768,53024,106048 --x-dem-empty-dist=212096 and found no visual effect, and with --dem-dists=19884,39768,53024 --x-dem-empty-dist= 106048 the hill shading didn't work at all, and my Oregon froze when I tried to show the elevation data for a route. So, I've also tried with a different patch that writes height 0 instead of "undefined". This seems to work, but I am not sure if it shows the wanted effect. I've attached this 2nd version. Please try on your own. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Dienstag, 17. April 2018 12:59:41 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? I prefer to have Basemap - but I know many people delete it by accident or don't activate it - and I just tried a gmapsupp DEM map will also give shading to overview map. And yeah - maybe call it --dem-empty-dist so you would have e.g. --dem-dists=19884,39768,53024,106048 --dem-empty-dist=212096 or --dem-dists=19884,39768,53024 --dem-empty-dist= 106048 not sure what values will work best. And yes I would expect only uknown or undefined heights should do the trick - but of course I do not know. With garmins usual approach i do guess it's possible to create it in a way that it switches off at some zoom level by inserting empty data. On 17 April 2018 at 12:40, Gerd Petermann <gpetermann_muenchen@hotmail.com<mailto:gpetermann_muenchen@hotmail.com>> wrote: Hi Felix, it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk>> im Auftrag von Felix Hartmann <extremecarver@gmail.com<mailto:extremecarver@gmail.com>> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map? Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful. Greetings Felix -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
Thanks a lot Gerd, I hope I find soon some time to try it out on my devices (etrex 30, oregon 600) On 18 April 2018 at 09:33, Gerd Petermann <gpetermann_muenchen@hotmail.com> wrote:
Hi Felix,
attached is a patch that implements option --x-dem-empty-dist as discussed. I tried with --dem-dists=19884,39768,53024,106048 --x-dem-empty-dist=212096 and found no visual effect, and with --dem-dists=19884,39768,53024 --x-dem-empty-dist= 106048 the hill shading didn't work at all, and my Oregon froze when I tried to show the elevation data for a route.
So, I've also tried with a different patch that writes height 0 instead of "undefined". This seems to work, but I am not sure if it shows the wanted effect. I've attached this 2nd version. Please try on your own.
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Dienstag, 17. April 2018 12:59:41 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
I prefer to have Basemap - but I know many people delete it by accident or don't activate it - and I just tried a gmapsupp DEM map will also give shading to overview map. And yeah - maybe call it --dem-empty-dist
so you would have e.g. --dem-dists=19884,39768,53024,106048 --dem-empty-dist=212096 or --dem-dists=19884,39768,53024 --dem-empty-dist= 106048
not sure what values will work best. And yes I would expect only uknown or undefined heights should do the trick - but of course I do not know. With garmins usual approach i do guess it's possible to create it in a way that it switches off at some zoom level by inserting empty data.
On 17 April 2018 at 12:40, Gerd Petermann <gpetermann_muenchen@hotmail.com <mailto:gpetermann_muenchen@hotmail.com>> wrote: Hi Felix,
it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default?
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap- dev-bounces@lists.mkgmap.org.uk>> im Auftrag von Felix Hartmann < extremecarver@gmail.com<mailto:extremecarver@gmail.com>> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map?
Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful.
Greetings Felix
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
_______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
I've played around a lot with different values - and it behaves very strange. e.g. 39768,53024 --x-dem-empty-dist=106048 does not work - no DEM shown at all. --dem-dists=39768 --x-dem-empty-dist=106048 - shows dem at 8-15km - at 20km then the Basemap DEM will be used instead. But at 5km where it's most important no DEM shown. I kinda guess there is some pointer we are missing here in mkgmap that is not about the 0m DEM at all, but about the thing as a whole. It's really hard to find any kind of pattern that shows with resolution DEM is taken at which zoom level - it seems to me e.g. 39768,53024,106048 - the first 39768 will be taken for all zoom levels - while producing e.g. 53024,106048 without x-dem the dem will never be used, however dem is shown if I a some x-dem value. Also sometimes I manged to brick my Oregon 600 to such a state that even without the mSD with maps inside it would not boot anymore - it got stuck on the first message "Oregon 600 - Copyright 2017" and not make it to the next steps of loading photos, then loading maps.. Had to start it via USB, switch off, then it booted now with the maps on mSD. Actually that happened to me also without the x-dem option when I tried different dem-dists. Maybe it's only safe to first remove the old dem gmapssupp.img, boot, shut down, then insert a new dem only gmapsupp.img - or not use the same name if you change it? On 18 April 2018 at 21:46, Felix Hartmann <extremecarver@gmail.com> wrote:
Thanks a lot Gerd, I hope I find soon some time to try it out on my devices (etrex 30, oregon 600)
On 18 April 2018 at 09:33, Gerd Petermann <gpetermann_muenchen@hotmail.com
wrote:
Hi Felix,
attached is a patch that implements option --x-dem-empty-dist as discussed. I tried with --dem-dists=19884,39768,53024,106048 --x-dem-empty-dist=212096 and found no visual effect, and with --dem-dists=19884,39768,53024 --x-dem-empty-dist= 106048 the hill shading didn't work at all, and my Oregon froze when I tried to show the elevation data for a route.
So, I've also tried with a different patch that writes height 0 instead of "undefined". This seems to work, but I am not sure if it shows the wanted effect. I've attached this 2nd version. Please try on your own.
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Dienstag, 17. April 2018 12:59:41 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
I prefer to have Basemap - but I know many people delete it by accident or don't activate it - and I just tried a gmapsupp DEM map will also give shading to overview map. And yeah - maybe call it --dem-empty-dist
so you would have e.g. --dem-dists=19884,39768,53024,106048 --dem-empty-dist=212096 or --dem-dists=19884,39768,53024 --dem-empty-dist= 106048
not sure what values will work best. And yes I would expect only uknown or undefined heights should do the trick - but of course I do not know. With garmins usual approach i do guess it's possible to create it in a way that it switches off at some zoom level by inserting empty data.
On 17 April 2018 at 12:40, Gerd Petermann <gpetermann_muenchen@hotmail.c om<mailto:gpetermann_muenchen@hotmail.com>> wrote: Hi Felix,
it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default?
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto: mkgmap-dev-bounces@lists.mkgmap.org.uk>> im Auftrag von Felix Hartmann < extremecarver@gmail.com<mailto:extremecarver@gmail.com>> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map?
Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful.
Greetings Felix
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
_______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
Hi Felix, did you also try to use as many DEM levels as --levels? Maybe Frank is right and there is some relation between them? Reg. a missing pointer: There may be something in TRE. If I got that right there are a lot of unknown sub sections in this file and I guess that Garmin assumes defaults if they are missing, and those defaults might not fit. I have no idea how to find out :( Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Freitag, 20. April 2018 21:49:06 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? I've played around a lot with different values - and it behaves very strange. e.g. 39768,53024 --x-dem-empty-dist=106048 does not work - no DEM shown at all. --dem-dists=39768 --x-dem-empty-dist=106048 - shows dem at 8-15km - at 20km then the Basemap DEM will be used instead. But at 5km where it's most important no DEM shown. I kinda guess there is some pointer we are missing here in mkgmap that is not about the 0m DEM at all, but about the thing as a whole. It's really hard to find any kind of pattern that shows with resolution DEM is taken at which zoom level - it seems to me e.g. 39768,53024,106048 - the first 39768 will be taken for all zoom levels - while producing e.g. 53024,106048 without x-dem the dem will never be used, however dem is shown if I a some x-dem value. Also sometimes I manged to brick my Oregon 600 to such a state that even without the mSD with maps inside it would not boot anymore - it got stuck on the first message "Oregon 600 - Copyright 2017" and not make it to the next steps of loading photos, then loading maps.. Had to start it via USB, switch off, then it booted now with the maps on mSD. Actually that happened to me also without the x-dem option when I tried different dem-dists. Maybe it's only safe to first remove the old dem gmapssupp.img, boot, shut down, then insert a new dem only gmapsupp.img - or not use the same name if you change it? On 18 April 2018 at 21:46, Felix Hartmann <extremecarver@gmail.com<mailto:extremecarver@gmail.com>> wrote: Thanks a lot Gerd, I hope I find soon some time to try it out on my devices (etrex 30, oregon 600) On 18 April 2018 at 09:33, Gerd Petermann <gpetermann_muenchen@hotmail.com<mailto:gpetermann_muenchen@hotmail.com>> wrote: Hi Felix, attached is a patch that implements option --x-dem-empty-dist as discussed. I tried with --dem-dists=19884,39768,53024,106048 --x-dem-empty-dist=212096 and found no visual effect, and with --dem-dists=19884,39768,53024 --x-dem-empty-dist= 106048 the hill shading didn't work at all, and my Oregon froze when I tried to show the elevation data for a route. So, I've also tried with a different patch that writes height 0 instead of "undefined". This seems to work, but I am not sure if it shows the wanted effect. I've attached this 2nd version. Please try on your own. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk>> im Auftrag von Felix Hartmann <extremecarver@gmail.com<mailto:extremecarver@gmail.com>> Gesendet: Dienstag, 17. April 2018 12:59:41 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? I prefer to have Basemap - but I know many people delete it by accident or don't activate it - and I just tried a gmapsupp DEM map will also give shading to overview map. And yeah - maybe call it --dem-empty-dist so you would have e.g. --dem-dists=19884,39768,53024,106048 --dem-empty-dist=212096 or --dem-dists=19884,39768,53024 --dem-empty-dist= 106048 not sure what values will work best. And yes I would expect only uknown or undefined heights should do the trick - but of course I do not know. With garmins usual approach i do guess it's possible to create it in a way that it switches off at some zoom level by inserting empty data. On 17 April 2018 at 12:40, Gerd Petermann <gpetermann_muenchen@hotmail.com<mailto:gpetermann_muenchen@hotmail.com><mailto:gpetermann_muenchen@hotmail.com<mailto:gpetermann_muenchen@hotmail.com>>> wrote: Hi Felix, it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default? Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk><mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk>>> im Auftrag von Felix Hartmann <extremecarver@gmail.com<mailto:extremecarver@gmail.com><mailto:extremecarver@gmail.com<mailto:extremecarver@gmail.com>>> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer? If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map? Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful. Greetings Felix -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk><mailto:mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich -- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
No I did not - It's not possible for as I tried to create a transparent gmapsupp.img only dem map. The good thing is if the basemap that is installed on the device has DEM - the transparent gmapsupp.img only map will not be used, as the basemap DEM (which is much lower details for the resolution then currently doable with mkgmap) will take precedence. The x-dem-empty-dist option is clearly working - but not helping right now. Best approach is a) map with one dem layer for Basecamp, b) gmapsupp.img dem only map and c) basemap with dem. Using DEM with AUTO mode (and not show if available) That way the DEM right now will work pretty good. Maybe mkgmap could also create basemaps with DEM? I don't think there are any worldwide basemaps with DEM for download by Garmin? I can only find this one: http://www8.garmin.com/support/download_details.jsp?id=461 If people do not (accidentally) delete the basemap this does not matter - I do not know how many people do so? On 23 April 2018 at 06:28, Gerd Petermann <gpetermann_muenchen@hotmail.com> wrote:
Hi Felix,
did you also try to use as many DEM levels as --levels? Maybe Frank is right and there is some relation between them?
Reg. a missing pointer: There may be something in TRE. If I got that right there are a lot of unknown sub sections in this file and I guess that Garmin assumes defaults if they are missing, and those defaults might not fit. I have no idea how to find out :(
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Freitag, 20. April 2018 21:49:06 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
I've played around a lot with different values - and it behaves very strange. e.g. 39768,53024 --x-dem-empty-dist=106048 does not work - no DEM shown at all. --dem-dists=39768 --x-dem-empty-dist=106048 - shows dem at 8-15km - at 20km then the Basemap DEM will be used instead. But at 5km where it's most important no DEM shown.
I kinda guess there is some pointer we are missing here in mkgmap that is not about the 0m DEM at all, but about the thing as a whole. It's really hard to find any kind of pattern that shows with resolution DEM is taken at which zoom level - it seems to me e.g. 39768,53024,106048 - the first 39768 will be taken for all zoom levels - while producing e.g. 53024,106048 without x-dem the dem will never be used, however dem is shown if I a some x-dem value. Also sometimes I manged to brick my Oregon 600 to such a state that even without the mSD with maps inside it would not boot anymore - it got stuck on the first message "Oregon 600 - Copyright 2017" and not make it to the next steps of loading photos, then loading maps.. Had to start it via USB, switch off, then it booted now with the maps on mSD. Actually that happened to me also without the x-dem option when I tried different dem-dists. Maybe it's only safe to first remove the old dem gmapssupp.img, boot, shut down, then insert a new dem only gmapsupp.img - or not use the same name if you change it?
On 18 April 2018 at 21:46, Felix Hartmann <extremecarver@gmail.com<mailto: extremecarver@gmail.com>> wrote: Thanks a lot Gerd, I hope I find soon some time to try it out on my devices (etrex 30, oregon 600)
On 18 April 2018 at 09:33, Gerd Petermann <gpetermann_muenchen@hotmail.com <mailto:gpetermann_muenchen@hotmail.com>> wrote: Hi Felix,
attached is a patch that implements option --x-dem-empty-dist as discussed. I tried with --dem-dists=19884,39768,53024,106048 --x-dem-empty-dist=212096 and found no visual effect, and with --dem-dists=19884,39768,53024 --x-dem-empty-dist= 106048 the hill shading didn't work at all, and my Oregon froze when I tried to show the elevation data for a route.
So, I've also tried with a different patch that writes height 0 instead of "undefined". This seems to work, but I am not sure if it shows the wanted effect. I've attached this 2nd version. Please try on your own.
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap- dev-bounces@lists.mkgmap.org.uk>> im Auftrag von Felix Hartmann < extremecarver@gmail.com<mailto:extremecarver@gmail.com>> Gesendet: Dienstag, 17. April 2018 12:59:41 An: Development list for mkgmap Betreff: Re: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
I prefer to have Basemap - but I know many people delete it by accident or don't activate it - and I just tried a gmapsupp DEM map will also give shading to overview map. And yeah - maybe call it --dem-empty-dist
so you would have e.g. --dem-dists=19884,39768,53024,106048 --dem-empty-dist=212096 or --dem-dists=19884,39768,53024 --dem-empty-dist= 106048
not sure what values will work best. And yes I would expect only uknown or undefined heights should do the trick - but of course I do not know. With garmins usual approach i do guess it's possible to create it in a way that it switches off at some zoom level by inserting empty data.
On 17 April 2018 at 12:40, Gerd Petermann <gpetermann_muenchen@hotmail.com <mailto:gpetermann_muenchen@hotmail.com><mailto:g petermann_muenchen@hotmail.com<mailto:gpetermann_muenchen@hotmail.com>>> wrote: Hi Felix,
it should be easy to add an empty layer, but I'd prefer a special option for that. Any ideas for a good option name? I guess an empty layer would be one that contains only "unknown" or "undefined" heights. No idea what the device will do with such a layer, I'll try it. If I got you right you prefer to have no basemap on your device? Or maybe some devices don't have one by default?
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk<mailto:mkgmap- dev-bounces@lists.mkgmap.org.uk><mailto:mkgmap-dev-bounces@ lists.mkgmap.org.uk<mailto:mkgmap-dev-bounces@lists.mkgmap.org.uk>>> im Auftrag von Felix Hartmann <extremecarver@gmail.com<mailto: extremecarver@gmail.com><mailto:extremecarver@gmail.com<mailto: extremecarver@gmail.com>>> Gesendet: Dienstag, 17. April 2018 11:50:42 An: Development list for mkgmap Betreff: [mkgmap-dev] Could mkgmap be extended to create an empty dem dist layer?
If compiling DEM gmapsupp.img for device, right now it will show forever when zooming out - it would be good to have a fake/empty dem top layer - say --dem-dists=19884,39768,53024,212096 with 212096 being empty or just having enough data that the device is not actually shading the map?
Basically I think dem on device is only useful from around 5-30km zoom levels (with default detail level). 5km is the lowest that the devices choose if DEM is on auto zoom level, but it will continue showing it indefinitely (at least if no basemap is activated) - so getting the device to show an empty dem to switch of shading would be pretty useful.
Greetings Felix
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk<mailto:mkgmap-dev@lists.mkgmap.org.uk
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-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
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-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
-- Felix Hartman - Openmtbmap.org & VeloMap.org Schusterbergweg 32/8 6020 Innsbruck Austria - Österreich
participants (2)
-
Felix Hartmann -
Gerd Petermann