using System.Globalization; namespace OSMDatastructure { public class Coordinates { public float lat { get; } public float lon { get; } public Coordinates(float lat, float lon) { this.lat = lat; this.lon = lon; } private const float decimalCoordsSave = 10000; private const ulong offset = 10000000; //Latitude maxChars = 7 //Longitude maxChars = 8 public ulong GetHash() { ulong latHash = Convert.ToUInt64((this.lat + 90) * decimalCoordsSave); ulong lonHash = Convert.ToUInt64((this.lon + 180) * decimalCoordsSave); return latHash * offset + lonHash; } public ulong GetRegionHash(float regionSize) { float latRegion = this.lat - this.lat % regionSize; float lonRegion = this.lon - this.lon % regionSize; ulong latHash = Convert.ToUInt64((latRegion + 90) * decimalCoordsSave); ulong lonHash = Convert.ToUInt64((lonRegion + 180) * decimalCoordsSave); return latHash * offset + lonHash; } public static Coordinates GetFromHash(ulong hash) { ulong latHash = (hash / offset) - 90; ulong lonHash = (hash % offset) - 180; float lat = Convert.ToSingle(latHash) / decimalCoordsSave; float lon = Convert.ToSingle(lonHash) / decimalCoordsSave; return new Coordinates(lat, lon); } public override string ToString() { return string.Format("{0} {1}", this.lat.ToString(CultureInfo.InvariantCulture), this.lon.ToString(CultureInfo.InvariantCulture)); } } }