How to use this library for clustering?

[papakonstantinouko]

Hello, I need to cluster data that include 1 million of map points. I was thinking to encode all those coordinates and save the hashes in the db. Then when a user accesses a map, get the viewport, divide it into 32 boxes, therefore create 32 clusters that include the pre-encoded map-points that fall within them. What do you think of this scenario? How would I be able to find the geohash for each of those 32 boxes?

edit: In your example

var isMatch = encoder.IsMatch("r3gx4", "r3gx41tj0g40", GeoHashPrecision.Level5);

how do get the string "r3gx4" in order to look for "r3gx41tj0g40"?