My suggestion would be to have something like a layer command for the style language.
Example: seamark:type=fairway [0x10702 resolution 20 layer 3] So polygons could be drawn sorted by layer for controlling draw-order on devices not supporting TYP. Remember: All these recent devices need maps without TYP: https://buy.garmin.com/en-US/US/cOnTheWater-c519-p1.html Currently it is even very problematic to draw just simple buildings on those devices. Not to mention water depth areas or intertidal zones. Jürgen Von: Ticker Berkin Gesendet: Freitag, 28. Oktober 2016 16:31 An: mkgmap-dev@lists.mkgmap.org.uk Betreff: Re: [mkgmap-dev] patch to write polygons in decreasing order I maintain that there isn't a universal _draworder that will render a map from OpenStreetMap data on the Garmin device in a similar way to how it is shown by www.openStreetMap.org - there are so many examples of nested areas of pasture, woods, grass, playgrounds, etc in any order of overlaying. You could say that these should be expressed as inner/outer multi -polygon relationships, but this is rarely done; it would be a lot of effort and the resultant system would be very unwieldy. It would have to be taken to its logical conclusion where, for any area, there is only one (non-transparent) representation. This is because, even for multi-polygon relationships, OpenStreetMap has the concept of the background behind the outer polygon that shows in the inner holes. This background seems to considered as such simply by being bigger than than the area in question. If the display represention is reduced to a single layer, then _draworder becomes irrelevant! On Sun, 2016-10-23 at 09:02 -0700, nwillink wrote: > OK > > Point taken. > > There is a mystery about some if not most TOPO TYP files containing > draworders which are not linked to polygon . > > Either they are left overs, which is very unusual, or they imply > another > purpose as yet undefined - the word container was used to describe > such > draworders but its unclear what they are grouping. > > > > -- > View this message in context: http://gis.19327.n8.nabble.com/patch-to > -write-polygons-in-decreasing-order-tp5884038p5884816.html > Sent from the Mkgmap Development mailing list archive at Nabble.com. > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev@lists.mkgmap.org.uk > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
_______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
