UPDATING A MAP FOR USE IN LOCALISING A MOBILE DEVICE

It is provided a system for updating a map. The system includes: a server and a mobile device. The mobile device is configured to: obtain a metric set; determine that processing by the server is to be used for at least some map processing when the metric set indicates a network condition that is sufficiently good; instructing the server to perform at least some map processing, when processing by the server is determined to be used; perform all map processing within the mobile device, when processing by the server is determined not to be used; and update a local map in the mobile device based on a result from the map processing. The server is configured to: when instructed by the mobile device performing at least some map processing; and transmit at least part of the result of the map processing in the server, to the mobile device.