Set Tile Resolution / Extent

[wroge]

Unfortunately, my generated Vector Tiles are incorrect... Previously I created my Vector Tiles with T-Rex, specifying a resolution of 16384. However, with Tegola, I am unable to configure the tile extent of the ST_AsMVT PostGIS function. (Default: 4096)

https://github.com/go-spatial/tegola/blob/master/provider/postgis/postgis.go#L1029

sqls = append(sqls, fmt.Sprintf(
    `(SELECT ST_AsMVT(q,'%s',%d,'%s',%s) AS data FROM (%s) AS q)`,
    layers[i].MVTName,
    tegola.DefaultExtent,
    l.GeomFieldName(),
    featureIDName,
    sql,
))

My config:

[[providers]]
# ...
type = "mvt_postgis"
uri = "${PG_CONNECTION}"
srid = 3857

[[providers.layers]]
# ...
geometry_type = "POLYGON"
id_fieldname = "objectid"
geometry_fieldname = "wkb_geometry"
sql = "SELECT ST_AsMVTGeom(ST_Transform(geom, 3857), ST_Transform(!BBOX!, 3857)) AS wkb_geometry, objectid FROM my_table WHERE ST_Transform(geom, 3857) && ST_Transform(!BBOX!, 3857)"

[[maps]]
# ...
bounds = [6.3, 51.25, 11.6, 54.17]
center = [10.023321918554046, 52.44665611695578, 15.0]
tile_buffer = 150

[[maps.layers]]
# ...
min_zoom = 12
max_zoom = 15 
dont_simplify = true

If desired, I can try to provide a pull request.

[wroge]

The issue was on my side.

[ARolek]

@wroge just wondering, why are you bumping up the resolution?

[wroge]

I thought it might help... other vector tiling tools offer this option. It doesn't make too much sense.. realize that now too.

[ARolek]

Ok got it. Generally speaking you should be able to pack plenty of data into the vector tile at zoom 16 and then let the UI over zoom on that tile.