January 2009 - mkgmap-dev - The mkgmap lists

Problem Generating gmapsupp.img
by Steve Ratcliffe 21 Mar '09

21 Mar '09

> Steve - any chance that support for this will be added to mkgmap? Yes, we need to add setting the draw priority and making the map transparent. I can easily add an option to set the draw priority which I believe is simply a case of setting a value in the TRE header. I am not so sure about the ins and outs of transparency. I think it is just a case of leaving out the background polygons. At one time mkgmap didn't add these and people said that the maps were transparent. However they didn't appear to be so for me, so there may be more to it. There is a flag that also appears to be something to do with transparency too. Anyway I will try those changes, and ask you to test it out if you don't mind. It will be probably not be until the new year though. ..Steve _________________________________________________________________ Are you a PC? Upload your PC story and show the world http://clk.atdmt.com/UKM/go/122465942/direct/01/

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Splitter
by Ralf Kleineisel 09 Feb '09

09 Feb '09

I tried the new OSM splitter for the first time yesterday and I really like it. It works great on normal OSM data. When I ran it on countour lines generated by srtm2osm it failed: I tried to split a SRTM osm file with 12 million nodes into subfiles with max-nodes 1200000. It generated only one file which contains only 45174 nodes. Any ideas?

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Find by name - experimental patch
by Mark Burton 01 Feb '09

01 Feb '09

Hi Folks, I recently discovered OSM, josm, mkgmap, etc. it's interesting stuff. As part of my contribution to the general effort, I have been working on getting the garmin "find by name" function working with city names contained in maps generated from OSM files. I believe I have the basis of a solution and the attached patch works for me - YMMV. I am posting it here so that it can be tested on more maps and gps types (I am using a etrex vista) and see if it works OK. Note that the patch hard codes the map's country name to GBR (UNITED KINGDOM). Obviously, that will need to be configurable but I haven't yet worked out the best way of achieving that. You must use a non-6 bit character set. I use the --latin1 option. So, if you can, please try the attached patch and see if it works for you. Obviously, if it breaks other stuff, we need to fix that right away. Cheers, Mark

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Wrong_route_calculation / strange straight routing lines on GPS
by Carlos Dávila 01 Feb '09

01 Feb '09

>On Jan 28, 2009, at 23:10, Gert Münzel wrote: >/> making my first steps with mkgmap that, although the routing works />/> fine in Mapsource, i get in trouble on my Gps unit Garmin gmap60csx. />/> Very often i got these strange straight magenta routing lines in />/> between normal routing. />/> Meanwhile i figured out that it seems to be that t has something to />/> do with the length of a polyline. I don't know if it is the count of />/> points/nodes of the polyline or still the lenght or both. />/> But comparing the same mp-file once compiled with mkgmap, once with />/> cgpsmapper i see, that cgpsmapper split these long lines during />/> mkgmap leave them like they are. /> >How did you compare the IMG files? Have you tried decompiling the >broken IMG with test.display.*? Have you tried manually splitting the >polylines in the .mp-file? Does it help? > >My guess is that the problem lies with long polylines (in the .mp- >file) that are split into several polylines (in the IMG) by mkgmap, >which results in a road made up of several polylines. > >But if I understand you correctly, maybe the problem is just with long >polylines in the IMG file? I think there must be something else than length of polylines and number of nodes. I get this error in a route that always starts at a node in a roundabout, no matter how far you fix the destination out of this point or in how many pieces you split the way. In another case, error seems to me to be related with the route crossing boundaries of an area tagged as area=yes, landuse=industrial, place_name=Pol. Ind. Las Capellanías

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[patch] mkgmap-add-eclipse-support
by Ben Konrath 01 Feb '09

01 Feb '09

Hi, I've been studying the mkgmap source for the past couple of days using eclipse and I needed this patch to get it work. Any chance this could be committed? Comments are appreciated. Cheers, Ben

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[PATCH] proof of concept code to generate fake POIS for named ways
by Mark Burton 01 Feb '09

01 Feb '09

Folks, The attached patch adds a --road-name-pois option that will generate a named node for each named way. It currently places the node near the middle of the way. The fake node has a tag place=road_name_POI and will need an entry in the points file like this: place=road_name_POI [0x640a resolution 21] I think the code 0x64a is a good choice because it is shows up as a "geographic point" (well, it does on the etrex). The patch is really just for experimentation and comment but it could grow into something useful. In particular, the manner I have implemented it may not be optimal/approved. It's just what came to mind first. As I don't actually need this functionality myself, perhaps it would be better for a developer that wants this (and has suitable hardware for testing) to take it over. BTW - It currently makes no attempt to merge multiple ways with the same name. Cheers, Mark

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Commit: r858: Add project files for eclipse.
by svn commit 31 Jan '09

31 Jan '09

Version 858 was commited by steve on 2009-01-31 15:28:19 +0000 (Sat, 31 Jan 2009) Add project files for eclipse. - Ben Konrath At the same time add idea project files in the new directory format.

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Commit: r857: Makes mkgmap cope with duplicate city names.
by svn commit 31 Jan '09

31 Jan '09

Version 857 was commited by steve on 2009-01-31 13:08:08 +0000 (Sat, 31 Jan 2009) Makes mkgmap cope with duplicate city names. With this patch, the GPS will know about all of the cities with the same name rather than just getting one of them as was happening before. - Mark Burton

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Autogenerating street name POIs to allow address searches
by Mark Burton 30 Jan '09

30 Jan '09

Carlos, > Is there any chance to do something similar in mkgmap? May be it could > insert a POI for each street or tag mid node of the street with its > name. Or maybe addresses tagged with Karlsruhe Schema [1] can be used. > Just some ideas. Yes, I'm sure we could do something like that. Not sure at this time whether mkgmap should do that or another tool that pre-processes the OSM data. A suitable type code would be 0x640a (which is a generic Locale). On my etrex, a point with this type is found in the "geographic points" category which sounds about right to represent a named way (street). I shall CC the mailing list so others can pick up on this subject. Cheers, Mark

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Garmin "Feature" or bug?
by Paul 30 Jan '09

30 Jan '09

I have a suspicion this is a Garmin "Feature" rather than a bug but thought it best to check. I have an Edge 605 which I'm using with routable maps created with mkgmap r806. If I go to the menu option to Find | Places then my 605 lists all places within a radius including those on the gmapsupp.img. There is also an option to enter a name manually but if I try this it only gives me place names from the gmapbmap.img. If I remove the gmapbmap.img and try again then the 605 crashes which is why I suspect it's a feature Can anyone shed any light on this Thanks Paul

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