kopia lustrzana https://github.com/openmaptiles/openmaptiles
0cff3449b5
This PR implements non-blocking updates in the park layer. The approach was to use the `REFRESH MATERIALIZED VIEW CONCURRENTLY` feature in postgres. In order to achieve this, a unique index was added on the z4 dissolved park area table. The `ST_Union` / `ST_Dump` sequence was changed to an explicit cluster DB scan (an equivalent operation) so that a unique osm ID could be generated from each dissolved polygon. Below is a screen shot from Idaho, USA showing that the dissolved z4 still works as expected.  |
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| .. | ||
| aerodrome_label | ||
| aeroway | ||
| boundary | ||
| building | ||
| housenumber | ||
| landcover | ||
| landuse | ||
| mountain_peak | ||
| park | ||
| place | ||
| poi | ||
| transportation | ||
| transportation_name | ||
| water | ||
| water_name | ||
| waterway | ||
