- mkgmap-dev - The mkgmap lists

[PATCH v4] remove bogus nodes
by Mark Burton 01 Dec '09

01 Dec '09

v4 - added --remove-bogus-nodes option to turn on this feature. Even though the reduction in nodes is fairly modest (typically 5-10%), I believe that this could be useful for those routable ways that share many points with non-routable lines or areas. A lot of roads do share points with neighbouring areas and in those cases, this option should remove a lot of bogus nodes. Whether that translates into improved routing in that region is yet to be proven. ---------- v3 - now duplicates ways so that any structural changes to the way made while processing a line/road will not affect the original way and so each map object generated from the original way will see the full set of points in the way. Duplicating the ways appeared to have no noticeable effect on the run time when processing the GB map. -------- v2 - avoid assertion when more than one routable way is generated from the same OSM way ------- With the recent reversion of the Table A breakage, it's now useful to post this patch for wider testing as it no longer causes my Nuvi to barf. What it does is remove routing nodes from ways that should never have been put there in the first place. Without this patch, a routable way will have a node for each of its points that are shared by any other way (whether the other ways are routable or not). For example, at the moment, if a way shares its points with a boundary line or shape, each of those points will become nodes. From the routing point of view, that's (essentially) harmless but having extra nodes does take up space and must slow down the routing calculation. It therefore makes sense to remove the bogus nodes. What this patch does is defer the processing of all of the points/lines/shapes until after their types have been computed. Having computed the ways' types we know what's routable and what isn't so nodes only need to be created where routable ways meet. That's the theory, in practice, it produces slightly smaller maps. Whether it actually improves the routing quality is yet to be determined. Obviously, the gain you will see depends on how many bogus nodes are in your maps. All feedback welcome. Mark

2 1

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

30 Nov '09

Clinton - thanks very much for checking on searching addresses in the Ireland map. There seems to be very good progress on address searching in mkgmap. Hopefully this will continue and these issues will get solved. Best Wishes, Cliff.

1 0

[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

6 15

[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

6 8

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

2 1

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.

1 0

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.

1 0

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.

1 0

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.

1 0

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.

1 0