Thanks, David. In the meantime, care to share any thoughts about your planned implementation?
On Thursday, November 6, 2014 8:11 AM, "david.w.smi...@gmail.com" <david.w.smi...@gmail.com> wrote: 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!
