geo.ST_Length() function
The geo.ST_Length() function is experimental and subject to change at any time.
By using this function, you accept the risks of experimental functions.
The geo.ST_Length() function returns the spherical length or distance
of the specified geographic information system (GIS) geometry.
Define distance units with the geo.units option.
Function type: Transformation
import "experimental/geo"
geo.ST_Length(
geometry: {linestring: "39.7515 14.01433, 38.3527 13.9228, 36.9978 15.08433"}
)
// Returns 346.1023974652474 (km)
Parameters
geometry
The GIS geometry to measure.
Can be either point or linestring geometry.
Points will always return 0.0.
See GIS geometry definitions.
Data type: Record
Examples
Calculate the length of geographic paths
import "experimental/geo"
region = {
minLat: 40.51757813,
maxLat: 40.86914063,
minLon: -73.65234375,
maxLon: -72.94921875
}
data
|> geo.toRows()
|> geo.asTracks()
|> geo.ST_LineString()
|> map(fn: (r) => ({
r with st_length: geo.ST_Length(geometry: {linestring: r.st_linestring})
}))
Support and feedback
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