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This web page nicolas-gramlich.blogspot.com states the following, "Nicos Guide to Life and Code." We saw that the webpage said " Ingredients Android, Sweat, Scala, Blood, Java, etc." It also said " From time to time one might feel the urgent need to execute geospatial queries on the Google AppEngine. Thinking in common SQL this is pretty easy, just a combined WHERE clause. SELECT FROM t spatialdata WHERE latitude south AND latitude north AND longitude west AND longitude east. So this problem can basically be solved, by using a algorithm called Geohash. Two classes from the Apache Co."