drawing issues on Mapbox

[andreschardonguwo]

T-rex is awesome. Everything seems to be working very well. However i'm having some issues with high-level zoom (above 12). I'm attaching a few screenshots. Was wondering if it was an issue with zoom level. But not sure

[pka]

Looks strange indeed! Are these maps rendered with a built-in viewer? Which version?

[andreschardonguwo]

I'm trying with the latest version 0.33.1. However, happens on the built in as well. Also noticed that no issues with built in OpenLayers and XRay

[pka]

Then I'm supecting degerated geometries caused by clipping or simplification (see #5). Can you turn off simplification and play with the clipping parameters? I'm very interested in a dataset working with OL, but not with MB GL js. Is your datasource public or can you make it available for testing?

[andreschardonguwo]

Thank's for the reply. I will test without simplification later today. I also can share this dataset. It's a query on our postgis server. However, I can export as shape file or geojson.

[andreschardonguwo]

Tried to remove clipping and simplification = false, and the result is the same. Some polygons have holes. Maybe that's the issue. However, on OL they are correctly drawn. I can send you the dataset. What's the best format?

[pka]

Best option would be a PG dump (pg_dump --file=out.dump --format=c --table=...). A file export would maybe do it as well.

[andreschardonguwo]

Find attached the dump file. Let me know if you able to test it. Thank you very much!.

out.zip

[pka]

Thanks for the data. I couldn't reproduce your output, but also saw some glitches when displaying it with Maputnik. A first look at the data shows some invalid geometries:

gid	st_npoints	st_nrings	st_isvaliddetail
162620	16348	11	(t,,)
162621	17451	9	(t,,)
162622	16006	6	(t,,)
162623	11674	8	(t,,)
162624	809	1	(t,,)
162625	12193	1	(t,,)
162626	22191	14	(f,"Too few points in geometry component",0101000000FBA45F828DCA53C1BED636691E7644C1)
162627	14718	2	(t,,)
162628	8661	2	(t,,)
162629	11419	9	(f,"Too few points in geometry component",01010000002E4D0730DEDB53C10198F0D8160045C1)
162630	8195	5	(f,"Too few points in geometry component",0101000000417405DD7AE553C132B7F7E9B3DC44C1)
162631	8441	9	(t,,)
162632	12311	4	(t,,)
162633	5055	1	(t,,)
162634	27981	10	(t,,)
162635	10026	2	(t,,)
162636	6761	2	(t,,)
162637	5083	1	(t,,)
162638	2663	1	(t,,)
162639	3961	1	(t,,)
162640	2929	1	(t,,)
162641	5122	1	(t,,)
162642	2513	1	(t,,)
162643	20223	10	(f,"Too few points in geometry component",010100000046B04456ECE453C1926402CE9EA644C1)
162644	6420	3	(t,,)
162645	3559	1	(t,,)
162646	2835	1	(t,,)

[andreschardonguwo]

Thank you @pka. I've published the layer and removed the invalid geometries, however, mabox still is drawing the lines. OpenLayers still fine.

[pka]

These artifacts are caused by unclipped polygons or lines. Clipping has been fixed for reprojected layers in 7801bb8 and in a6889b7 for config files written with version 0.7.2.
Always use buffer_size in your configuration!