Returns the geographical information for all the devices (pool) in which:
You may create a group of devices sharing the same name for MEMORY BIT F, then you can ask for the list of all these devices.
A device can show / hide itself setting the value of MEMORY BIT F to 1 / 0.
To prevent illegal operations, response are returned ONLY if the email address of a valid user (stored as an EMAIL user into remote device) is provided as a POST DATA.
Geographical features, along with their non-spatial attributes are returned in GeoJSON format [ more info on GeoJSON format ].