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[mkgmap-dev] mkgmap-r3906 (optimize-index)

From Gerd Petermann GPetermann_muenchen at hotmail.com on Wed Apr 19 07:21:27 BST 2017

Hi Carlos,

thanks for testing. I am now looking again at the details for the prefix/suffix support.

Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Carlos Dávila <cdavilam at orangecorreo.es>
Gesendet: Dienstag, 18. April 2017 23:29:37
An: Development list for mkgmap
Betreff: Re: [mkgmap-dev] mkgmap-r3906 (optimize-index)

El 17/04/17 a las 20:05, Gerd Petermann escribió:
> Hi all,
> with the help of Steve I fixed some problems with the index, esp. sorting of road names with different speliing of Straße caused a lot of problems, like Ahornstraße (Germany) and Ahornstrasse (Switzerland).
> I think address / road search works very well now, at least with west european languages.
> I tried various combinations of options like --latin1 / --unicode, --lower-case,  --x-split-name-index both in MapSource and on my Oregon 600 and always got what I expected.
> If you try this version, please make sure that you also compile the img files with this version so that the changes in the sort are used everywhere.
> The branch also reduces peak memory compared to trunk and because of that it is faster when creating large indexes, but speed is probably not so important here.
> The created index is a bit smaller although it now also contains roads with an empty string as first label.
> If memory is still an issue for you when compiling the index for large maps I can try to implement a merge sort which would only create the - heap consuming - sort
> keys for a rather small number (e.g. 100.000) roads and sort those and finally merge the parts.
> If you know special cases which don't work with r3890 trunk please try the branch and let me know if something might be improved.
> I think it is a big step forward, but there may still be special cases with other languages.
> I used a small set of only 4 tiles to test functionality and compiled index for Europe (compiled with default style) (>1600 tiles) with -Xmx6800m and --x-split-name-index
> Gerd
I could not yet test it in deep, but first few searches seem to work
pretty well both on MapSource and nuvi
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