Foreground extrusions missing with vector tile returned by the vector tile search API

[thibaultclem]

We use Mapbox GL JS to retrieve tiles from the new vector tile search API.

Everything work as expected until we try to extrude the features to display it in 3D:

map.addLayer({
          id: 'building_layer',
          type: "fill-extrusion",
          source: 'building_source',
          minzoom: 12,
          "source-layer": "hits",
          paint: {
            "fill-extrusion-color": "#00ade6",
            "fill-extrusion-height": 2,
          },
        });

As you can see on the image, the foreground extrusions is missing:

When I decode the tile using node-mapnik I get:

[{"name":"hits","extent":4096,"version":2,"features":[{"type":3,"properties":{"_id":"59633","_index":"building-v1","id":59633,"gross_floor":180,"floor_nb":2,"unit_nb":1,"protected_rank":0,"principal_type":"Zone d'habitation de très faible densité","city_name":"La Tour-de-Peilz"},"geometry":[9,934,5244,26,22,18,6,7,21,17,15]}]},{"name":"meta","extent":4096,"version":2,"features":[{"type":3,"properties":{"_shards.failed":0,"_shards.skipped":0,"_shards.successful":1,"_shards.total":1,"timed_out":false,"took":1},"geometry":[9,0,8192,26,8192,0,0,8191,8191,0,15]}]}]

Then when I try to get the validity report of this tile with node-mapnik I got the following error:

[Error: Vector Tile has POLYGON with first ring clockwise. It is not valid according to v2 of VT spec.]

It looks like an old issue in PostGIS 2.4.4 related on this post:

Polygon fill-extrusion foreground extrusions missing with some tiles

Who was fix in 2.4.5:
https://trac.osgeo.org/postgis/ticket/4079

Is there something I doing wrong, or do I need to create an issue on Github ?

For information the orientation of my geo_shape is RIGHT.
Elasticsearch version is 8.2.0, environment is Elastic cloud.

All the best,

Thibault

[Ignacio_Vera]

Hi Thibault,

Thank you for reporting, this looks very similar to the bug fixed in the upstream library we are using:

Polygon orientation

Unfortunately it seems the fix has never been released. Could you please open an issue in the Elasticsearch repository?

[thibaultclem]

Hi Ignacio,

Thanks for your quick reply, I will open an issue on github.

Thibault

[Ignacio_Vera]

Adding the issue here: Foreground extrusions missing with vector tile returned by the vector tile search API · Issue #86560 · elastic/elasticsearch · GitHub

It should have been fixed in 8.2.1 and 7.17.4.

Thanks!

[thibaultclem]

I confirm the fix is working as expecting. Thanks a lot