openmaptiles

History

benedikt-brandtner-bikemap 66731f3544

This PR addresses two main issues introduced by the new ID-Based Merged-LineString Updates

1. Partial Indexes can only be accessed when the query matches more or less exactly and the query-planner will fail to use indexes when targeted via the join-condition and not the where-condition
    - `osm_transportation_merge_linestring_gen_z9`
    - `osm_transportation_name_network`
    - `osm_shipway_linestring`
    - `osm_aerialway_linestring`
    - `osm_waterway_linestring`
2. When intersecting updated Source-LineStrings with the existing Merged-LineStrings we join the Source-IDs of each existing Merged-LineString. This bloats the table unnecessarily and slows down bigger updates considerably.
    - This is addressed by aggregating the Source-IDs of each existing Merged-LineString into an array and concatinating these arrays when grouping them. Afterwards we add the IDs of updated SourceLineStrings and deduplicate the result before adding it to the Source-IDs-Table.

2023-06-19 10:12:57 +02:00

etl_diagram.png

Waterway zoomlevel 6 - 8 corresponding with water (#1291 )

2021-11-10 20:26:14 +01:00

mapping_diagram.png

Waterway zoomlevel 6 - 8 corresponding with water (#1291 )

2021-11-10 20:26:14 +01:00

mapping.yaml

Waterway zoomlevel 6 - 8 corresponding with water (#1291 )

2021-11-10 20:26:14 +01:00

README.md

Update diagrams