Some info on how/why forest/wood tagging is used in Lithuania. I will not give specific tags (forest vs wood, landuse vs natural etc), because in my opinion that is a secondary issue. Let's say we have tags F1 and F2.
F1 is for general forests. Those are the ones depicted on small scale maps (full country/region). Topology: They cannot overlap with other general landuse polygons: water, reservoirs, riverbanks, meadows, scrub, sand, residential, commercial, industrial zones etc. Usage: cartography: when generating small scale map we get a topologically correct mosaic - non overlapping polygons - we do not have to worry about overlapping polygons, draw order. statistics: used to calculate percentage of forest coverage for a region F2 is for small wooded areas INSIDE other polygons, usually inside residential, commercial, industrial zones. Topology: They MUST be above (fully inside) residential, commercial or industrial polygon. If the F2 forest area is too large to be included in say residential area - change it to F1. Usage: cartography: ignored for small scale maps. for large scale maps (detailed small area) they are drawn on top of residential, commercial and industrial areas. statistics: ignored when calculating percentage of forest coverage. This approach ignores utility as such (managed, non managed, natural, left for full nature cycles as mention in Oleksiy's post). This information could be added as a sub-tag if needed for some thematic maps or specific statistical calculations. What I'm saying is that maybe we should: 1. first decide the PURPOSES of having "tree cluster" polygons tagged separately. 2. Then PRIORITISE the purposes (based on ACTUAL usage ignoring all "it could theoretically be used to/for...") 3. and then decide which info goes to primary tag, which goes to secondary tag(s). 4. And only THEN decide on actual tags (keys, values). Doing it the other way round will take us back to this forest discussion as it has been here for the last ten years like discussing what the words "forest", "wood", "natural", "landuse", "landcover" etc. actually mean. -- Tomas _______________________________________________ talk mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk
