[mkgmap-dev] [PATCH v1] - clone ways that contain some tag pairsFrom Torsten Leistikow de_muur at gmx.de on Mon Jul 6 17:05:42 BST 2009
Thilo Hannemann schrieb: > I think it would be advantageous to generalize this kind of > behaviour. What about a "continue" flag in the Garmin type definition > in the style files? This continue flag would indicate that a match > with that rule generates a copy of the way, but that the processing > continues with the next match. For example: > > boundary=administrative [0x1e resolution 12 continue] > highway=primary [0x06 level 12] I thought about this topic before, and I would prefer a little different syntax extension, where your example would look like: boundary=administrative <0x1e resolution 12> highway=primary [0x06 level 12] I.e., the  brackets would mean like now: use this conversion only, and the <> brackets would mean: use this conversion and search for additional conversions for the same OSM element. I have no development environment for mkgmap, I have only browsed the source code. But I think for such a change the following modifications are required: 1. The classes storing the conversions need to get an extra method Is_Final, which signals whether the conversion of an Element has to stop, when this conversion is used. 2. The parsing of the style files must be extended, so that the new syntax is recognised. 3. The function searching for a matching conversion must get an input parameter, specifying the last used conversion. (If this parameter is omitted, the search must start at the first element.) 4. Right now for each element the first matching conversion is determined and aplied. This must be changed into a loop, where the search and the aplication is repeated, until the used conversion is marked as final (Is_Final method from above), or no matching conversion is found any more. I'd like to help implementing such an extension, but realistically there is no chance, that I can contribute something until the cycling season is over. Gruss Torsten
- Previous message: [mkgmap-dev] [PATCH v1] - clone ways that contain some tag pairs
- Next message: [mkgmap-dev] Commit: r1079: Create contour lines directly from a SRTM (or CGIAR, ASTER) file.
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
More information about the mkgmap-dev mailing list