@@ -28,8 +28,8 @@ However, 'dqcjqcp84c6e' is not centered inside 'dqcjqc', and searching within 'd So instead, we can use the mathematical properties of the Geohash to quickly calculate the neighbors of 'dqcjqc'; we find that they are: 'dqcjqf','dqcjqb','dqcjr1','dqcjq9','dqcjqd','dqcjr4','dqcjr0','dqcjq8' -This gives us a bounding box around 'dqcjqcp84c6e' roughly 2km x 1.5km and allows for a database search on fewer than 9 keys: -SELECT * FROM table WHERE LEFT(geohash,6) IN ('dqcjqf','dqcjqb','dqcjr1','dqcjq9','dqcjqd','dqcjr4','dqcjr0','dqcjq8'); +This gives us a bounding box around 'dqcjqcp84c6e' roughly 2km x 1.5km and allows for a database search on just 9 keys: +SELECT * FROM table WHERE LEFT(geohash,6) IN ('dqcjqc', 'dqcjqf','dqcjqb','dqcjr1','dqcjq9','dqcjqd','dqcjr4','dqcjr0','dqcjq8'); MORE INFORMATION GeoHash on Wikipedia (http://en.wikipedia.org/wiki/Geohash) README @@ -130,7 +130,7 @@ function plotGeoHash (gLatLng) { for (var n in geoHashBox.neighbors) { boxes.push("'"+geoHashBox.neighbors[n].geohash+"'"); } - boxList.innerHTML += boxes.join(',') + ")"; + boxList.innerHTML += boxes.join(',') + geoHashBox.geohash + ")"; searchInfo = document.getElementById("searchInfo"); var xdistance = geoHashBox.neighbors.topleft.corners.topleft.distanceFrom(geoHashBox.neighbors.topright.corners.topright); geohash-demo.js 45c9cd07efffc62905557ddc68793ed27aac88e5 David Troy dave@popvox.com http://github.com/davetroy/geohash-js/commit/6422e85e3ebfd454cb49991d430aac9ac4b62319 6422e85e3ebfd454cb49991d430aac9ac4b62319 2008-05-30T11:55:26-07:00 2008-05-30T11:55:26-07:00 Search list should include self 3587c51e1bbe14b97aec99e91e87dce5e4b59b02 David Troy dave@popvox.com