If you just need the intersecting geohashes for a provided polygon you can
do so in a few lines without indexing the shape.
// build poly
ctx = JtsSpatialContext.GEO;
Shape shape = ctx.readShapeFromWkt(wkt);
// build geohash prefix tree and iterate intersecting cells
CellIterator iter = new GeohashPrefixTree(ctx,
6).getTreeCellIterator(shape, 6);
while (iter.hasNext()) {
Cell c = iter.next();
System.out.println(c);
}
On Mon, Oct 12, 2015 at 4:40 AM, Swarn Kumar
wrote:
>
> Hi,
>
> I am trying to find intersecting geo-hashes(upto precision length 6) of
> around 2lakhs polygons. I have tried using postgis st_geohash and
> st_intersect but it is very slow for my use-case. I need to index 2lakhs
> polygons and find their intersecting geohashes in 2 mins.
>
> I read it that its possible to do so using lucene.
>
> http://opensourceconnections.com/blog/2014/04/11/indexing-polygons-in-lucene-with-accuracy/
>
> Kindly, tell me how to do it or point me in the right direction.
>
> Regards,
> Swarn Avinash Kumar
>
