[Tile-serving] [osm2pgsql] Investigate clustering on geohash (#87)

[Paul Norman]

Note: SQL was

```sql
SELECT AVG((SELECT COUNT(*) FROM (SELECT DISTINCT (ctid::text::point)[0] AS page FROM planet_osm_line WHERE ST_Buffer(point,0.0001) && way) AS s)) FROM (SELECT ST_SetSRID(ST_Point(-123.32+0.01*x, 49+0.01*y),4326) AS point FROM generate_series(0,64) x CROSS JOIN generate_series(0,40) y) AS points;
```

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/87#issuecomment-28284917
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