C++ Native Functions: com.ibm.streamsx.network.geohash
Specialized toolkits - release 4.3.1.0-prod20190605 > com.ibm.streamsx.network 3.2.1 > com.ibm.streamsx.network.geohash > C++ Native Functions
- public list<float64> geohashDecode(rstring geohash)
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The geohashDecode() function decodes a geohash as the latitude and longitude of its center point and bounding box. The 'geohash' argument is a string value of 1 to 12 characters composed of the characters '0123456789bcdefghjkmnpqrstuvwxyz'.
The function returns a list of six float64 values if the 'geohash' value is valid:
- 0: the latitude of the center point
- 1: the longitude of the center point
- 2: the latitude of the top edge (that is, the northern edge) of the bounding box
- 3: the longitude of the right edge (that is, the eastern edge) of the bounding box
- 4: the latitude of the bottom edge (that is, the southern edge) of the bounding box
- 5: the longitude of the left edge (that is, the western edge) of the bounding box
The function returns an empty list if the 'geohash' value is not valid.
- public rstring geohashEncode(float64 latitude, float64 longitude, int32 precision)
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The geohashEncode() function encodes a latitude/longitude pair as a geohash of a specified precision. The argument values are limited to these ranges:
- 'latitude' is a float64 value limited to the range -90 to +90, representing degrees of latitude
- 'longitude' is a float64 value limited to the range -180 to +180, representing degrees of longitude
- 'precision' is an int32 value limited to the range 1 to 12, specifying the length of the 'geohash'
The function returns a string of length 'precision' containing the encoded 'geohash' if all of the parameters are within range. The 'geohash' string is composed of the characters '0123456789bcdefghjkmnpqrstuvwxyz'.
The function returns an empty string if any of the parameters are out of range.