Create vector Hazard Map using mbtiles

[Ben Wyss]

Create vector Hazard Map using mbtiles

[Ben Wyss (bmwyss)]

Originally it was thought that it would not be possible to render a hazard map wing tilemile as the hazard data included 700,000 points. However after discovering the mapnick Shapefile Indexes, the efficiency to handel this large data set was achieved.

To produce a vector hazard map using QGIS and tilemill:

1. prep the data as needed with QGIS
2. apply a spacial index to the shapefile with:
    shapeindex your-shapefile.shp
3. import the shapefile into tilemill, style and render

also see:

http://developmentseed.org/blog/2011/mar/29/speed-optimizations-tilemill-shapefile-indexes/

[Ben Wyss (bmwyss)]

git hub: https://github.com/gem/oq-platform/pull/24