Function point() assembles two numbers representing latitude and longitude into geographical coordinates of point type.
Arguments：
- object of latitude & longitude <object>
Returns：
- geographical coordinates <point>
Common Usage
Example: Convert Beijing (39.9° N 116.3° E) to geographical coordinates
return point({latitude:39.9, longitude:116.3})
POINT(39.900000 116.300000)
Example: Convert each row of an alias into geographical coordinates
uncollect [{latitude:39.9, longitude:116.3},{latitude:31.2, longitude:121.5}] as a
return point(a)
POINT(39.900000 116.300000)
POINT(31.200000 121.500000)
Analysis: The input parameter of function point() is an object, not the latitude and longitude in decimal form.
Sample graph: (to be used for the following examples)
create().node_property(@default, "name").node_property(@default, "lat_long", point)
insert().into(@default).nodes([{_id:"L001", _uuid:1, name:"New York", lat_long:point({latitude:40.7, longitude:-74.0})}, {_id:"L002", _uuid:2, name:"Paris", lat_long:point({latitude:48.5, longitude:2.2})}, {_id:"L003", _uuid:3, name:"Sydney", lat_long:point({latitude:-33.9, longitude:150.9})}, {_id:"L004", _uuid:4, name:"Beijing", lat_long:point({latitude:39.9, longitude:116.3})}])
Example: Insert node Shanghai (31.2° N 121.5° E) into @location
insert().into(@default).nodes({name: "Shanghai", lat_long: point({latitude: 31.2, longitude: 121.5}), _id: "L005", _uuid: 5}) as n
return n{*}
| _id | _uuid | name | lat_long |
|-------|-------|------------|-----------------------------|
| L005 | 5 | Shanghai | POINT(31.200000 121.500000) |