November 2009 - mkgmap-dev - The mkgmap lists

[PATCH v1] Merge similar lines and ways
by Thilo Hannemann 30 Nov '09

30 Nov '09

The attached will merge lines that are similar* after styling. It is activated by the switch "--merge-lines". As there are less way fragments, the Douglas-Peucker filter will work better and the routing should improve somewhat, because the ways will be longer and the routing algorithm won't give up too soon. The size of the resulting map is reduced a little bit as well. The patch is based on code published by Johann Gail on this mailing list. *) similar means that they have the same attributes: name, ref, access, etc. Regards Thilo

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[PATCH v1] Improve delete-tag-list with blacklist-tags-file and whitelist-tags-file
by wmgcnfg＠web.de 30 Nov '09

30 Nov '09

The new option committed in r1279 by Mark Burton is great. The attached patch improves it so that you can define a blacklist-tags-file (renamed delete-tags-file option) and a whitelist-tags-file. The new whitelist improves the speed for generating special maps that are interested only in a few tags. Comments are welcome! WanMil ______________________________________________________ GRATIS für alle WEB.DE-Nutzer: Die maxdome Movie-FLAT! Jetzt freischalten unter http://movieflat.web.de

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mdr address index with gmapsupp and macroadtrip installers
by Nolan Clifford 30 Nov '09

30 Nov '09

Could anyone post the two calls they make to mkgmap and gmapi-builder.py and specify what data set they were successful with from the point of view of getting Address Search to work in Roadtrip? Preferably data from the Geofabrik extracts repository. I have not been able to get Roadtrip or a Etrex Vista to search addresses yet. At this stage, I just want to be able to replicate what someone else has done so I can track down where my problem might be. Thanks, Cliff

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Re: [mkgmap-dev] Don't let action rule execute its actions if its type isn't going to be used
by Clinton Gladstone 29 Nov '09

29 Nov '09

On Nov 30, 2009, at 0:41, Felix Hartmann wrote: > it's not that difficult. > > if I put highway=* & oneway=yes {set oneway=-1}[0x01 road_class=0 road_speed=0 resolution 24 continue] > oneway=-1 will not be remembered and only the way I used up here will be reversed Ah, I think, as they say, "the penny has dropped". In other words, the action is executed, but only for the copied way and not for the other subsequent matches. And "continue with_actions" will execute the action for the original way, which will cause all matches to receive the effect of the action. (For example, all matches would get oneway=-1) Is this a reasonable understanding of the function? Cheers.

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Commit: r1413: Don't execute actions for non-first match unless 'with_actions' specified.
by svn commit 29 Nov '09

29 Nov '09

Version 1413 was commited by markb on 2009-11-29 23:23:12 +0000 (Sun, 29 Nov 2009) Don't execute actions for non-first match unless 'with_actions' specified. Also, return null if action rule result would be ignored anyway so that sequence rules will go on to process more sub-rules.

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Commit: r1412: Duplicate ways before calling resolveType().
by svn commit 29 Nov '09

29 Nov '09

Version 1412 was commited by markb on 2009-11-29 23:23:09 +0000 (Sun, 29 Nov 2009) Duplicate ways before calling resolveType(). This will stop any changes to the way by either the style rule actions or the map object generation affecting other map objects generated from the same way.

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Commit: r1411: Reinstate the resolveType(Element) to keep the test suite happy.
by svn commit 29 Nov '09

29 Nov '09

Version 1411 was commited by markb on 2009-11-29 23:23:06 +0000 (Sun, 29 Nov 2009) Reinstate the resolveType(Element) to keep the test suite happy.

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Errors description
by Carlos Dávila 29 Nov '09

29 Nov '09

I'm planning to put a list of the errors detected by mkgmap during map generation on my download page to get more people involved fixing them. Below is the text I'll include in the readme file of the download to ask you for suggestions/improvements on it. Cheers Carlos Readme: This is a short description of the errors listed in the files contained in errors.zip. All these errors can cause routing to fail. For each error listed, ID of the wrong element and a link to download the area into JOSM or view it in a web browser is given. If you want to improve the quality of the maps, please spend some time fixing some of these errors. Roundabouts.txt: Roundabout XXX starts/ends/forks at...: indicates that a way or a set of ways tagged as junction=roundabout is/are not closed or has a portion going out/coming in the roundabout. Flares.txt: this file groups different problems affecting the roads that connect a roundabout with other roads. Arcs.txt: Similar arcs XXX and YYY at...: indicates that XXX and YYY ways are overlapping. Oneway_roads.txt: this file groups different problems affecting oneway roads, going to/coming from nowhere. Turn_restriction.txt: this file groups different problems affecting turn restrictions. Problems can be the lack or excess of any of the turn restriction elements or some of them not connecting. Motorway_exits.txt: motorway_junction nodes must be placed on roads with a ref tag, in order to process them correctly as motorway exits. This file collects those motorway exits positioned on ways lacking ref tag.

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Simplifying ways & rounding
by Mark Burton 29 Nov '09

29 Nov '09

Hi Johann, Been trying your patch and it works well. Certainly doesn't seem to break the routing. However, it doesn't always merge ways that, as far as I can tell, should be merged. I have studied your code so I know how you're doing the matching. One thought, would rounding the coords before merging help? If it isn't that, something else must be not quite right. Cheers, Mark

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[PATCH] Sharpened DP filter
by Johann Gail 29 Nov '09

29 Nov '09

Hello, some days ago someone asked, if it is possible to make the dp filter more aggressive. If you apply the attached patch, it comments out the default dp filter and activates the straight version of the dp filter. Its already in the code. This version does not look at the nodes, it straightens out as far as possible. This could mean some inaccuracies at crossings. In combination with the line merging filter (V8 simplify ways) it gaves real straightend motorway lines at low resolutions. Looks similar to the garmin maps. Feel free to try it, it works really fine, but this patch should not made its way into the trunk. If you find it usefull, I will prepare a cleaner one. What I would achive in future is a solution between the recent dp filter and this aggressive one. But this is outstanding work. Next week I will find less time to continue work.

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