How to create an empty overview map (for transparent maps)
If you create a separate map for buildings or contourlines only - usually there is no need for an overview map - or better no need for any content in the overview map - or am I missing something? Because those maps sometimes may have very large tiles, but very few levels (maybe only 24) - mkgmap creates an overview map at the next resolution - and will then often throw warnings such as: SEVERE (OverviewBuilder): Tile selection (0x4a) polygon for tile 84900000 cannot be written in level 0 resolution 21, using 20 instead There is still a need for an empty overview map - as without it you cannot show the map in Basecamp/Mapsource - or transfer it with MapInstall. I know the overview map is only empty 0x4a polygons - just wondered if there is a better solution... --overview-levels= is not given. -- Felix Hartman - Openmtbmap.org & VeloMap.org
Hi, yes, I think that message makes no sense in this situation. I am not sure why I decided to log this as an error. See https://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=3679 I've attached a patch to suppress the message if the input file is a ovm_*.img. I could also simply reduce severity to warning or remove it for good. Gerd ________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Mittwoch, 1. September 2021 12:18 An: Development list for mkgmap Betreff: [mkgmap-dev] How to create an empty overview map (for transparent maps) If you create a separate map for buildings or contourlines only - usually there is no need for an overview map - or better no need for any content in the overview map - or am I missing something? Because those maps sometimes may have very large tiles, but very few levels (maybe only 24) - mkgmap creates an overview map at the next resolution - and will then often throw warnings such as: SEVERE (OverviewBuilder): Tile selection (0x4a) polygon for tile 84900000 cannot be written in level 0 resolution 21, using 20 instead There is still a need for an empty overview map - as without it you cannot show the map in Basecamp/Mapsource - or transfer it with MapInstall. I know the overview map is only empty 0x4a polygons - just wondered if there is a better solution... --overview-levels= is not given. -- Felix Hartman - Openmtbmap.org & VeloMap.org
I think just remove the warning. I could not notice any problem due to it ( and if there would be problems, by now at least one user of my maps should have complained) On Mon, 13 Sept 2021 at 12:09, Gerd Petermann < gpetermann_muenchen@hotmail.com> wrote:
Hi,
yes, I think that message makes no sense in this situation. I am not sure why I decided to log this as an error. See https://www.mkgmap.org.uk/websvn/revision.php?repname=mkgmap&rev=3679
I've attached a patch to suppress the message if the input file is a ovm_*.img. I could also simply reduce severity to warning or remove it for good.
Gerd
________________________________________ Von: mkgmap-dev <mkgmap-dev-bounces@lists.mkgmap.org.uk> im Auftrag von Felix Hartmann <extremecarver@gmail.com> Gesendet: Mittwoch, 1. September 2021 12:18 An: Development list for mkgmap Betreff: [mkgmap-dev] How to create an empty overview map (for transparent maps)
If you create a separate map for buildings or contourlines only - usually there is no need for an overview map - or better no need for any content in the overview map - or am I missing something?
Because those maps sometimes may have very large tiles, but very few levels (maybe only 24) - mkgmap creates an overview map at the next resolution - and will then often throw warnings such as:
SEVERE (OverviewBuilder): Tile selection (0x4a) polygon for tile 84900000 cannot be written in level 0 resolution 21, using 20 instead
There is still a need for an empty overview map - as without it you cannot show the map in Basecamp/Mapsource - or transfer it with MapInstall. I know the overview map is only empty 0x4a polygons - just wondered if there is a better solution...
--overview-levels= is not given.
-- Felix Hartman - Openmtbmap.org & VeloMap.org
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-- Felix Hartman - Openmtbmap.org & VeloMap.org
participants (2)
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Felix Hartmann -
Gerd Petermann