[mkgmap-dev] Tiles pruned in DEM map

Tue Jan 26 14:52:15 GMT 2021

I have compiled Australia with mkgmap r4600, with dem and without 
--no-order-by-decreasing-area at the end of command line and all tiles 
seem to display correctly. Overview size is 4.5 GB. What size is 
expected to cause trouble?

El 24/1/21 a las 8:59, Gerd Petermann escribió:
> Hi Ticker,
>
> my concern was not about the number of additional bytes on the disk, but the size limits in IMG format. Anyway, since nobody else commented we probably only find out when someone hits that limit, so I've committed the patch (first v5, than changes from v6, sorry for that) with  r4599.
>
> Gerd
>
> ________________________________________
> Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
> Gesendet: Samstag, 23. Januar 2021 19:54
> An: Development list for mkgmap
> Betreff: Re: [mkgmap-dev] Tiles pruned in DEM map
>
> Hi Gerd
>
> Given that the overview map is for use on computers with 100s of G of
> disk space and the main map will be a G or so, can an extra few 10K or
> so in the overview map really be a problem for anyone?
>
> Building British-and-ireland, with default style and just --gmapsupp
> (ie no index or routing) gmapsupp.img is 542M and osmmap.img is 220k.
> With --order-by-decreasing-area they increase to 603M (11.3%) and 228k
> (3.6%).
>
> With routing, indexing, code page 1252 and other typical options,
> gmapsupp.imp might be double the size and so the percentage increase
> would be a lot less but not significantly different for osmmap.img.
>
> Ticker
>
> On Sat, 2021-01-23 at 11:29 +0000, Gerd Petermann wrote:
>> Hi Ticker,
>>
>> outch, sorry! It seems I created my patch without any testing :(
>> I'm still not happy with the handling of the --order-by-decreasing
>> -area option. I wonder why nobody else comments on this. Either
>> nobody cares about the size of the overview map or nobody else tried
>> any of the patches. Since this is a major change I hoped for more
>> feedback.
>>
>> Gerd
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