Filtering the vector tile endpoints based on priority and zoom levels.

[hasan9206]

I have noticed that while the other geometries are simplified at different zoom levels, this is not the case with points, the http://localhost:3001/services/postgis/pois/geom/vector-tiles/10/719/410.pbf (point layer) is 212kb, and as we go to higher zoom levels it is sliced. I have over 27k points in the layer and when the endpoints are created for lower zoom levels, (9 or 10) they take a long time to load and process.

According to VectorTiles.md , I can filter the results by adding the where query string in the URL, :

http://localhost:3001/services/postgis/pois/geom/vector-tiles/10/719/410.pbf?where=priority%3C3 

But using the where query string in the URL will filter all the results, while I only want to filter the results based on zoom levels.

Is there a way to get different different query strings for different zoom levels, so I can filter my results on the fly?

[DanielShinken]

Hi!, did you manage to solve this issue?, I'm using something like this

http://localhost:3000/services/postgis/mapas_dip2013/geom/vector-tiles/{z}/{x}/{y}.pbf?fields=id,ganador,seccion this does work, returning those fields, but if I want to filter like this

http://localhost:3000/services/postgis/mapas_dip2013/geom/vector-tiles/{z}/{x}/{y}.pbf?where=ano%3d2013 as the docs said is not filtering my tiles, did you manage to solve this? How did you work around on this? greetings!

[hasan9206]

@DanielShinken I wasn't able to get the Vector Tiles to filter data based on zoom levels, which was what I wanted to do ( PGRestAPI was returning all the data at all the zoom levels, which was a bit of overkill ). I couldn't find a workaround to this as PGRestAPI uses the same query on all zoom levels ( one query per table ) I switched over to TileStache and was able to get my queries to work (granted TileStache has a much steeper learning curve and requires alot more work to set up and get running).

As for the query filter you are referring to, I was able to get it to work sometimes but not always, I'm not sure what I was doing wrong or different.