stezii / tilestrata-postgismvt Goto Github PK

tilestrata-postgismvt fails for me and I don't know whether it's my data, my postgis install or a bug in tilestrata-postgismvt. Here is the failing auto-generated query:

SELECT ST_AsMVT('l1', 256, 'geom', q) AS mvt FROM (
   SELECT ST_AsMVTGeom(ST_Transform(public.kalktest.geom, 3857), 
             TileBBox(4, 8, 4, 3857), 256, 0, false) geom , kalkinnhol
    FROM public.kalktest
    WHERE ST_Intersects(TileBBox(4, 8, 4, 3857), public.kalktest.geom)
) AS q

mvt_agg_transfn: geometry column cannot be null error: mvt_agg_transfn: geometry column cannot be null

My config:

  .use(postgismvt({
    lyr: {
      table: 'public.kalktest',
      geometry: 'geom',
//      type: 'circle',
      srid: 3857,
      minZoom: 0,
      maxZoom: 19,
      buffer: 0,
      fields: 'kalkinnhol',
      resolution: 256
    },

If I add
WHERE geom IS NOT NULL
to the default query at index.js:104 it returns tiles.

I'm trying to use this library with npm but the signature is wrong, can you update the npm package?

thanks.

Hi. Thanks for this lib, it's really interesting and helpful

Btw, what about some data simplification ? Currently I have more than 300 000 features in my PostGIS table and when I trying to serve this data with tilestrata-postgismvt - it sends for about ~35 mb of data (all possible features) without any simplification based on zoom or whatever else. You can see it on the attached screenshoot

I think it will be great to add some option (like simplify: true or more smart one) and refactor SQL query to simplify (reduce or union) the features based on zoom for example. What do you think?

Im using this with mapboxgl JS and I cannot view the geometries on the map because source-layer is required and tilestrata-postgismvt do not support layers inside the source.

map.addSource('countries', {
"type": "vector",
"tiles": ["localhost:5003/postgismvt_layer_name/{z}/{x}/{y}.mvt"]
});
 
map.addLayer({
"id": "countries",
"type": "fill",
"source": "countries",
"source-layer": "layers_inside_postgismvt_layer",
});

So Im wondering if has any way to add layers inside tilestrata-postgismvt to create nested layers.

Hi. I'm trying to run own tile-server that works with dynamic tiles from PostGIS.

I have: PG 10, PostGIS 2.4, TileBBox from Mapbox and data exported with ogr2ogr.

My server code is:

var tilestrata = require('tilestrata');
var disk = require('tilestrata-disk');
var dependency = require('tilestrata-dependency');
var strata = tilestrata();
var postgismvt = require('tilestrata-postgismvt');
var headers = require('tilestrata-headers');

strata.layer('data').route('tile.mvt')
  .use(headers({'Access-Control-Allow-Origin': '*'})).use(postgismvt({
    lyr: {
      table: 'public.table_name',
      geometry: 'wkb_geometry',
      type: 'circle',
      srid: 4326,
      minZoom: 3,
      maxZoom: 19,
      buffer: 10,
      fields: 'type ogc_fid',
      resolution: 256,
    },
    pgConfig: {
      host: '0.0.0.0',
      user: 'postgres',
      password: 'postgres',
      database: 'database',
      port: '5432'
    }}));

// start accepting requests
strata.listen(8080);

But when I try to connect it to Mapbox GL JS - I see an errors:

mapbox.addSource('table_name', {
   'type': 'vector',
   'tiles': [
        "http://localhost:8080/table_name/{z}/{x}/{y}/tile.mvt"
   ]
});

XHR finished loading: GET "http://localhost:8080/data/11/602/769/tile.mvt".
exports.getArrayBuffer @ blob:http://localhost:3000/c4a4aaef-41f9-439c-9f35-18659ae78ad7:293
loadVectorTile @ blob:http://localhost:3000/c4a4aaef-41f9-439c-9f35-18659ae78ad7:121
VectorTileWorkerSource.loadTile @ blob:http://localhost:3000/c4a4aaef-41f9-439c-9f35-18659ae78ad7:121
Worker.loadTile @ blob:http://localhost:3000/c4a4aaef-41f9-439c-9f35-18659ae78ad7:123
Actor.receive @ blob:http://localhost:3000/c4a4aaef-41f9-439c-9f35-18659ae78ad7:291

Error: Error: http status 200 returned without content.

What am I doing wrong?