OwnHomeMap normalizes water and green-space polygons from the active map backend. When automatic mode is configured, OpenFreeMap/OpenMapTiles is primary. The water layer accepts polygons from the OpenMapTiles water layer except swimming_pool; this can include ocean, lake, pond, river or dock classes returned by the tiles. The green-space layer accepts landcover features whose class is grass and whose subclass is park or grass. If automatic mode falls back to direct OpenStreetMap/Overpass, water instead comes from polygons tagged natural=water or waterway=riverbank, and green space from leisure=park or landuse=grass. Both paths feed the same internal water and park polygon layers, drawn below roads and colored by the selected theme. Features outside those source-specific rules do not automatically appear. A supported feature can still be absent because it was not mapped, not returned, generalized upstream in vector tiles, incomplete or outside the loaded extent. The preview is the place to inspect the result; absence in the poster is not evidence of real-world absence.
Current layer rules
- OpenMapTiles water
- water-layer polygons except swimming_pool
- OpenMapTiles green space
- grass landcover with park or grass subclass
- Overpass fallback
- natural=water, waterway=riverbank, leisure=park and landuse=grass polygons
- Order
- water, then green space, then road network
Why a feature may not appear
Different tag
OpenStreetMap may describe the feature with a tag outside the renderer's current allowlist.
Different geometry
A linear or point feature does not satisfy a polygon-only layer rule.
Source coverage
No matching feature may have been mapped or returned for the requested area.
Selected extent
The feature may sit outside the area loaded for the current center and radius.
Limits to keep in mind
- Layer absence is not proof of real-world absence and should not be used for planning or safety decisions.
- The current green-space rules do not represent every land-cover category available in OpenStreetMap.
- Fine details can become visually negligible at poster scale, and vector-tile sources may already generalize geometry upstream.