Calculates a geohash value given two fields representing latitude and longitude.
Parameter | Type | Required | Default Value | Description |
---|---|---|---|---|
as | string | optional[a] | _geohash | The name of the field that is produced by the function. |
lat | string | optional[a] | ip.lat | The field to use for latitude. |
lon | string | optional[a] | ip.lon | The field to use for longitude. |
precision | number | optional[a] | 12 | The precision to use in the calculation. Usually 12 is enough. |
[a] Optional parameters use their default value unless explicitly set. |
Calculate the geohash value of a set of coordinates.
geohash(lat=myLatField, lon=myLonField)
geohash()
Examples
Click
next to an example below to get the full details.Calculate Geohash Value of a Set of Coordinates
Calculate a geohash value given two fields representing latitude and longitude using the geohash()
function
Query
londonLat := 51.507222
| londonLon := -0.1275
| geohash(lat=londonLat, lon=londonLon)
Introduction
In this example, the geohash()
function is used to
calculate the geohash values for London. Note that the values of
latitude and longitude coordinates must be expressed in decimal degrees.
Step-by-Step
Starting with the source repository events.
- logscale
londonLat := 51.507222 | londonLon := -0.1275 | geohash(lat=londonLat, lon=londonLon)
Calculates the geohash value of a set of coordinates extracted from the fields lat=londonLat and lon=londonLon, and returns the result in a field named _geohash.
Event Result set.
Summary and Results
The query is used to calculate the geohash value for London
(lat
,
lon
). A geohash is used for indexing
locations on maps and in databases.
You can use the worldMap()
function to plot
existing geo-coordinates (latitude/longitude) on the World Map by adding
this to the query:
| worldMap(lat=location.latitude,
lon=location.longitude)
Sample output from the incoming example data:
_geohash | londonLat | londonLon |
---|---|---|
gcpvj0e5m415 | 51.507222 | -0.1275 |