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splashblot / dronedb

Location Intelligence & Data Visualization tool
http://carto.com
BSD 3-Clause "New" or "Revised" License
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Incomplete points drawing at different zoom levels #20

Closed ivanprado closed 7 years ago

ivanprado commented 7 years ago

Look what happen here when zooming out on a dataset with many points. image image image

For some reason, at smaller zoom levels drawing is not completed. is there a limit on the number of shapes carto can draw?

apercas commented 7 years ago

UPDATE:

I checked wether this happens or it doesn't on CARTO (either old editor or the builder) with the own dataset used here and I confirmed that it works perfectly. After this we discussed that maybe it is a matter of how many points we're displaying and applied a LIMIT clause to the SELECT and then with a WHERE cartodb_id > x (x: 50000, 75000, 100000...) query on the builder to check if the points displayed changed if I asked for different points. It did so.

Once the difference on the amount of points was clear I asked on CARTO's Google Group https://groups.google.com/forum/#!topic/cartodb/nzrti8xF73M where they informed me to check a possible DB timeout (I had already checked that).

Thinking it is related with the painting we started checking how Windshaft / Mapnik handles the data for the tiles it serves.

I was currently debugging L250 of /dronedb/node_modules/cartodb.js/src/vis/vis.js, the _onMapInstanceCreated method. No conclusion yet whatsoever 🙁

jjmata commented 7 years ago

OK, looks like (by dumb luck, and thanks to the pointers @apercas gave me) I was able to find the problem quickly: look here.

jjmata commented 7 years ago

Re-spinning for a new docker-dronedb as I type this ...