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TileMill crashes on mapping 100k points

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jamez

23 Dec, 2011 11:20 PM

I need to map a hundred thousand points on the area of a large city. The points represent a value (wealth) and are styled as circles of different size and colours. Often, while browsing the map or changing the zoom level TileMill crashes. Every single time i try to export my map as an MBtile, I witness tilemill swallowing up most of my 4GB of ram and dieing even before starting to write a single tile.

Is this a nodejs or a tilemill issue? How can I help debugging this?

Happy Holidays

1. Support Staff 2 Posted by Will White on 24 Dec, 2011 01:44 AM

   

   Hi there,
   Thanks for reporting the issue. What is the format of the datasource that's providing the 100k points?

   Thanks,
   Will

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2. 3 Posted by jamez on 24 Dec, 2011 10:54 AM

   

   Hi Will,

   my pleasure to make TileMill even better. The source I'm using is a CSV file, with lat, lon and value_to_map. I guess I could learn SpatiaLite if necessary, but it would be anyhow useful to know why it doesn't work.

   Best to you

   Edit: Santa brought me good will. Acquired knowledge of Spatialite, I can confirm this is a CSV input issue. Everything works nominally with Sqlite. Happy Holidays!

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3. Support Staff 4 Posted by Tom MacWright on 26 Dec, 2011 01:20 AM

   

   Great to hear! Yep, CSV support is definitely not geared towards high numbers of points, whereas Spatialite, Shapefiles, and PostGIS should all be quite zippy.

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4. Tom MacWright closed this discussion on 26 Dec, 2011 01:20 AM.

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