Show HN: Flatmap – a new tool to create vector tiles from OpenStreetMap data

• planetiler

  30 1,149 9.3 Java

  Flexible tool to build planet-scale vector tilesets from OpenStreetMap data fast

  

Flatmap calls into user-defined profiles in 2 places: first when processing each input element to map it to a vector tile feature, then a second time right before emitting all vector features in a layer.

That second call lets you manipulate vector features on each tile using JTS geometry utilities (i.e. merge nearby polygons or lines with the same tags). PostGIS uses GEOS which is ported from JTS so you have access to pretty much the same geometry utilities - often with the same name.

It's definitely not as flexible as a PostGIS based solution - especially if you join faraway features that don't appear on the same tile, but in practice it was enough to port the entire OpenMapTiles schema.

See the basemap layers package: https://github.com/onthegomap/flatmap/tree/main/flatmap-base...

For example see the landcover layer: https://github.com/onthegomap/flatmap/blob/main/flatmap-base...

Which was ported from the SQL contained in: https://github.com/openmaptiles/openmaptiles/tree/master/lay...

Also, this OpenMapTiles PR might help improve your pipeline after it gets merged: https://github.com/openmaptiles/openmaptiles-tools/pull/383

• openmaptiles

  8 2,290 8.0 PLpgSQL

  OpenMapTiles Vector Tile Schema Implementation

  

Flatmap calls into user-defined profiles in 2 places: first when processing each input element to map it to a vector tile feature, then a second time right before emitting all vector features in a layer.

That second call lets you manipulate vector features on each tile using JTS geometry utilities (i.e. merge nearby polygons or lines with the same tags). PostGIS uses GEOS which is ported from JTS so you have access to pretty much the same geometry utilities - often with the same name.

It's definitely not as flexible as a PostGIS based solution - especially if you join faraway features that don't appear on the same tile, but in practice it was enough to port the entire OpenMapTiles schema.

See the basemap layers package: https://github.com/onthegomap/flatmap/tree/main/flatmap-base...

For example see the landcover layer: https://github.com/onthegomap/flatmap/blob/main/flatmap-base...

Which was ported from the SQL contained in: https://github.com/openmaptiles/openmaptiles/tree/master/lay...

Also, this OpenMapTiles PR might help improve your pipeline after it gets merged: https://github.com/openmaptiles/openmaptiles-tools/pull/383

• WorkOS

  workos.com sponsored

  The modern identity platform for B2B SaaS. The APIs are flexible and easy-to-use, supporting authentication, user identity, and complex enterprise features like SSO and SCIM provisioning.

  

• operations

  12 97 5.0

  OSMF Operations Working Group issue tracking

  

Nice :)

There's an ongoing effort to research vector tile solutions for openstreetmap.org. I wonder how your software stack compares to tilemaker, which has seen some optimization lately.

https://github.com/openstreetmap/operations/issues/565

• openmaptiles-tools

  1 366 5.8 Python

  Tools to turn the schema into other formats

  

Flatmap calls into user-defined profiles in 2 places: first when processing each input element to map it to a vector tile feature, then a second time right before emitting all vector features in a layer.

That second call lets you manipulate vector features on each tile using JTS geometry utilities (i.e. merge nearby polygons or lines with the same tags). PostGIS uses GEOS which is ported from JTS so you have access to pretty much the same geometry utilities - often with the same name.

It's definitely not as flexible as a PostGIS based solution - especially if you join faraway features that don't appear on the same tile, but in practice it was enough to port the entire OpenMapTiles schema.

See the basemap layers package: https://github.com/onthegomap/flatmap/tree/main/flatmap-base...

For example see the landcover layer: https://github.com/onthegomap/flatmap/blob/main/flatmap-base...

Which was ported from the SQL contained in: https://github.com/openmaptiles/openmaptiles/tree/master/lay...

Also, this OpenMapTiles PR might help improve your pipeline after it gets merged: https://github.com/openmaptiles/openmaptiles-tools/pull/383

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