climbingTiles: exploration #2 – proper pg client + MVT z10 encoding

[zbycz]

https://app.xata.io/workspaces/osmapp-tvgiad/dbs/db_with_direct_access:us-east-1/branches/main/tables/climbing_tiles

Overpass elements: 168427
Records: 22288
Query length: 7853932 chars
Duration of query: 9702 ms

## with geohash 9

Overpass elements: 168427
Records: (22288)
SQL Query length: 8143684 chars
Done.
Duration: 13089 ms
 GET /api/climbing-tiles/refresh 200 in 15376ms

Geohash

https://www.movable-type.co.uk/scripts/geohash.html

u
Latitude: 67.50000±22.50000, Longitude: 22.50000±22.50000
u2
Latitude: 47.81250±2.81250, Longitude: 16.87500±5.62500
u2f
Latitude: 49.92188±0.70313, Longitude: 14.76563±0.70313
u2fs
Latitude: 50.00977±0.08789, Longitude: 14.94141±0.17578
u2fsm
Latitude: 49.98779±0.02197, Longitude: 15.00732±0.02197
u2fsmq
Latitude: 50.00153±0.00275, Longitude: 15.00183±0.00549
u2fsmq4
Latitude: 49.99947±0.00069, Longitude: 14.99977±0.00069
u2fsmq4x
Latitude: 50.00007±0.00009, Longitude: 14.99994±0.00017
u2fsmq4xj
Latitude: 50.00000±0.00002, Longitude: 15.00001±0.00002

Perf

• vercel:

  • refresh pg - 70 secs
  • climbingTileXata WHERE type='group' AND geohash = 'u2' 829ms 2484 640ms 606ms
  • climbingTilePg WHERE type='group' AND geohash = 'u2' 256ms 2484 320ms 258ms

• geohash LIKE 'u2%' -> 12k -> 2.2 sec

• type='group' AND geohash LIKE 'u2%' -> 2k -> 2.7 sec, 1.9sec

XATA client:
climbingTile 1879.7577090000268 2484
GET /api/climbing-tiles/tile 200 in 1928ms

PG client:
climbingTile 2070.8319999999367 2484
GET /api/climbing-tiles/tile 200 in 2660ms

MVT

tile	features	MVT	GeoJSON	img
10/555/347 vrchlice	567	30kB	146 kB (15kB gz)
10/552/348 Roviště	1147	61kB	295 kB (32kB gz)

[vercel]

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Name	Status	Preview	Updated (UTC)
osmapp	❌ Failed (Inspect)		Jan 11, 2025 2:24pm