Extract fields transform reduces numeric precision


I’m using Grafana 1.0.2 and trying to extract coordinates from a field, but having a problem where only 3 digits are produced

So for instance, the coordinates ‘138.673593283, -35.5354984’ become ‘138, -35.5’
On a map, this means that multiple points are shown in the same place on a map.

I’m using an ‘extract fields’ transform, with fields [0] and [1] and the json field looks like:
“location”: [138.673593283, -35.5354984]


thank you in advance for any help or suggestions