FYI I plan to implement this in Lucene-spatial & Solr in January. ~ David Smiley Freelance Apache Lucene/Solr Search Consultant/Developer http://www.linkedin.com/in/davidwsmiley
On Wed, Nov 5, 2014 at 10:52 PM, Shahak Nagiel <snag...@yahoo.com.invalid> wrote: > I need a way to perform a spatial aggregation query against a potentially > large document store in order to display summary clusters on a map. The > query would slice the current map extents (e.g. -180,-90,180,90) into a > number of X and Y bins (e.g. 20 x 16) and, for each, seek a summary count, > so that a heat map or series of clusters could be rendered for the grids. > > Given Lucene's native usage of prefix trees/geohashes, this seems to be a > good fit. As a user pans and zooms the map, new map extents would apply, > so this would need to support dynamic grids. However, snapping > results/bins to existing geohashes (of the appropriate depth/level) would > be fine, assuming that lines up with how the indexes are structured. > > Naively, I could just issue a series of spatial queries, one for each > grid, and get the count. But I wonder if there's a better way... > > Has anyone encountered this use case? Any suggestions on the best/most > efficient way to achieve? > > Thanks!
