A method, comprising: receiving one or more signals wirelessly transmitted from one or more wireless network elements (105, 110, 115, 120, 125); identifying, by a mobile device, an associated local map based at least in part on the received one or more signals, wherein said identifying comprises one of the following: identifying, by the mobile device, the associated local map based at least in part on a Media Access Control Identifier, MAC ID, of the one or more signals received, or receiving, via the one or more signals, a Uniform Reference Indicator, URI, indicating a location where the associated local map is accessible; obtaining the associated local map and annotations associated with the associated local map, wherein the associated local map has a predefined coordinate system; and in case the identification of the local map comprises reception of the URI, the method further comprises one of the following: transmitting a Dynamic Host Configuration Protocol, DHCP, request for an Internet Protocol, IP, address to at least one of the one or more wireless network elements (105, 110, 115, 120, 125) and receiving the URI in a DHCP Offer response from the at least one of the one or more wireless network elements (105, 110, 115, 120, 125), or receiving the URI via a network layer broadcast packet or from a link-layer broadcast frame, or receiving the URI in a signal response to an 802.11 probe request, or receiving an encoded URI in one or more service set identifier, SSID, of a wireless network element (105, 110, 115, 120, 125) and/or comprising a network address where the associated local map is stored. receiving one or more signals wirelessly transmitted from one or more wireless network elements (105, 110, 115, 120, 125); identifying, by a mobile device, an associated local map based at least in part on the received one or more signals, wherein said identifying comprises one of the following: identifying, by the mobile device, the associated local map based at least in part on a Media Access Control Identifier, MAC ID, of the one or more signals received, or receiving, via the one or more signals, a Uniform Reference Indicator, URI, indicating a location where the associated local map is accessible; identifying, by the mobile device, the associated local map based at least in part on a Media Access Control Identifier, MAC ID, of the one or more signals received, or receiving, via the one or more signals, a Uniform Reference Indicator, URI, indicating a location where the associated local map is accessible; obtaining the associated local map and annotations associated with the associated local map, wherein the associated local map has a predefined coordinate system; and in case the identification of the local map comprises reception of the URI, the method further comprises one of the following: transmitting a Dynamic Host Configuration Protocol, DHCP, request for an Internet Protocol, IP, address to at least one of the one or more wireless network elements (105, 110, 115, 120, 125) and receiving the URI in a DHCP Offer response from the at least one of the one or more wireless network elements (105, 110, 115, 120, 125), or receiving the URI via a network layer broadcast packet or from a link-layer broadcast frame, or receiving the URI in a signal response to an 802.11 probe request, or receiving an encoded URI in one or more service set identifier, SSID, of a wireless network element (105, 110, 115, 120, 125) and/or comprising a network address where the associated local map is stored. transmitting a Dynamic Host Configuration Protocol, DHCP, request for an Internet Protocol, IP, address to at least one of the one or more wireless network elements (105, 110, 115, 120, 125) and receiving the URI in a DHCP Offer response from the at least one of the one or more wireless network elements (105, 110, 115, 120, 125), or receiving the URI via a network layer broadcast packet or from a link-layer broadcast frame, or receiving the URI in a signal response to an 802.11 probe request, or receiving an encoded URI in one or more service set identifier, SSID, of a wireless network element (105, 110, 115, 120, 125) and/or comprising a network address where the associated local map is stored.