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Overview map

Mike Baggaley
Gerd's comment about looking at the overview map, prompted me to look at
mine, and I realised I didn't have one (or it is empty), despite me having
--tdbfile specified - the help for this option says an overview map will be
created. I assume I am not getting an overview map because I don't have
--overview-levels specified. Would it be better if the default for
--overview-levels is not an empty string when --tdbfile is specified?

The documentation for --overview-levels is not very clear. From inspecting
the code it looks like the format expected is similar to the format expected
by --levels and that the overview level numbers should be greater than the
normal levels. Can the documentation for this be improved? Also, what is the
benefit of specifying something like --overview-levels=5:15,6:13,7:11 over
the much simpler --overview-levels=15,13,11 and have mkgmap work out the
next free levels. Could we simplify this?

Regards,
Mike


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Re: Overview map

Gerd Petermann
Hi Mike,

I don't see a need to change the syntax for the levels statements, but if you have a patch for the
docu please post it.

Gerd
________________________________________
Von: mkgmap-dev <[hidden email]> im Auftrag von Mike Baggaley <[hidden email]>
Gesendet: Sonntag, 12. März 2017 19:34:34
An: 'Development list for mkgmap'
Betreff: [mkgmap-dev] Overview map

Gerd's comment about looking at the overview map, prompted me to look at
mine, and I realised I didn't have one (or it is empty), despite me having
--tdbfile specified - the help for this option says an overview map will be
created. I assume I am not getting an overview map because I don't have
--overview-levels specified. Would it be better if the default for
--overview-levels is not an empty string when --tdbfile is specified?

The documentation for --overview-levels is not very clear. From inspecting
the code it looks like the format expected is similar to the format expected
by --levels and that the overview level numbers should be greater than the
normal levels. Can the documentation for this be improved? Also, what is the
benefit of specifying something like --overview-levels=5:15,6:13,7:11 over
the much simpler --overview-levels=15,13,11 and have mkgmap work out the
next free levels. Could we simplify this?

Regards,
Mike


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mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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Re: Overview map

Mike Baggaley
Hi Gerd, I was really hoping that someone who understood how this works
could provide some useful information. However, I can have a play with it
and try to determine how it should be used and hopefully come up with some
improved documentation afterwards.

The style manual mentions that ideally you should limit the amount of
information included in the overview file, but I can't find any mention in
the manual as to how to prevent information from being included in the
overview file, with it only going to the main file. I would also want to use
different line types for the overview file (e.g. make the lines representing
roads narrower). How do I do that?

Cheers,
Mike

-----Original Message-----
From: Gerd Petermann [mailto:[hidden email]]
Sent: 12 March 2017 19:44
To: Development list for mkgmap <[hidden email]>
Subject: Re: [mkgmap-dev] Overview map

Hi Mike,

I don't see a need to change the syntax for the levels statements, but if
you have a patch for the
docu please post it.

Gerd
________________________________________
Von: mkgmap-dev <[hidden email]> im Auftrag von Mike
Baggaley <[hidden email]>
Gesendet: Sonntag, 12. März 2017 19:34:34
An: 'Development list for mkgmap'
Betreff: [mkgmap-dev] Overview map

Gerd's comment about looking at the overview map, prompted me to look at
mine, and I realised I didn't have one (or it is empty), despite me having
--tdbfile specified - the help for this option says an overview map will be
created. I assume I am not getting an overview map because I don't have
--overview-levels specified. Would it be better if the default for
--overview-levels is not an empty string when --tdbfile is specified?

The documentation for --overview-levels is not very clear. From inspecting
the code it looks like the format expected is similar to the format expected
by --levels and that the overview level numbers should be greater than the
normal levels. Can the documentation for this be improved? Also, what is the
benefit of specifying something like --overview-levels=5:15,6:13,7:11 over
the much simpler --overview-levels=15,13,11 and have mkgmap work out the
next free levels. Could we simplify this?

Regards,
Mike


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mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev


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Re: Overview map

Gerd Petermann
Hi Mike,

if your overview map contains data with resolution 17 and lower, you should only render a few
objects at this low resolution, e.g. large cities, motorways, large rivers etc.
POI for shops are not a good candidate for the overview map.
Normally you don't have to change much in your style, you just change the level statements
so that the lower resolutions are placed in the overview map.

Gerd

________________________________________
Von: mkgmap-dev <[hidden email]> im Auftrag von Mike Baggaley <[hidden email]>
Gesendet: Dienstag, 14. März 2017 17:58:54
An: 'Development list for mkgmap'
Betreff: Re: [mkgmap-dev] Overview map

Hi Gerd, I was really hoping that someone who understood how this works
could provide some useful information. However, I can have a play with it
and try to determine how it should be used and hopefully come up with some
improved documentation afterwards.

The style manual mentions that ideally you should limit the amount of
information included in the overview file, but I can't find any mention in
the manual as to how to prevent information from being included in the
overview file, with it only going to the main file. I would also want to use
different line types for the overview file (e.g. make the lines representing
roads narrower). How do I do that?

Cheers,
Mike

-----Original Message-----
From: Gerd Petermann [mailto:[hidden email]]
Sent: 12 March 2017 19:44
To: Development list for mkgmap <[hidden email]>
Subject: Re: [mkgmap-dev] Overview map

Hi Mike,

I don't see a need to change the syntax for the levels statements, but if
you have a patch for the
docu please post it.

Gerd
________________________________________
Von: mkgmap-dev <[hidden email]> im Auftrag von Mike
Baggaley <[hidden email]>
Gesendet: Sonntag, 12. März 2017 19:34:34
An: 'Development list for mkgmap'
Betreff: [mkgmap-dev] Overview map

Gerd's comment about looking at the overview map, prompted me to look at
mine, and I realised I didn't have one (or it is empty), despite me having
--tdbfile specified - the help for this option says an overview map will be
created. I assume I am not getting an overview map because I don't have
--overview-levels specified. Would it be better if the default for
--overview-levels is not an empty string when --tdbfile is specified?

The documentation for --overview-levels is not very clear. From inspecting
the code it looks like the format expected is similar to the format expected
by --levels and that the overview level numbers should be greater than the
normal levels. Can the documentation for this be improved? Also, what is the
benefit of specifying something like --overview-levels=5:15,6:13,7:11 over
the much simpler --overview-levels=15,13,11 and have mkgmap work out the
next free levels. Could we simplify this?

Regards,
Mike


_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev


_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________
mkgmap-dev mailing list
[hidden email]
http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
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