Is it possible to set default value for metric in world map panel

Hi All,

Our response from datasource is not having any numeric values. So we are not sure which field to use as metric in world map panel with geohash

Our response is something like

{
“name” : “testService”,
“description” : “testing TAS datasource”
“geopoint” : {
“lat” : 12.0
“lon” : 4.3234
}
“location” : “HK”
}

Regards
Vijaya Kumar