1. A method of vehicular positioning of nodes of a radio frequency (RF) wireless network comprising a plurality of nodes disposed at respective fixed locations and a plurality of mobile nodes that reside in respective vehicles that move within a service area of the wireless network, and wherein each node of the plurality of nodes comprises one or more communication interfaces configured for scanning an RF wireless environment of the respective node, the method comprising:periodically receiving respective wireless fingerprint sample data generated by each mobile node of the plurality of mobile nodes, the wireless fingerprint sample data comprising data elements characterizing RF signals received by the mobile node from RF signal sources during scanning of the RF wireless environment of the mobile node and a corresponding geographic location within the service area at which the RF signals were received;
forming a collection of the wireless fingerprint sample data received from the plurality of mobile nodes;
receiving a request for an estimated geographic location of a particular mobile node of the plurality of mobile nodes;
searching the collection using a wireless snapshot comprising data elements characterizing RF signals received in a current RF wireless environment of the particular mobile node, to identify wireless fingerprint samples of the collection that match the data elements of the wireless snapshot; and
calculating an estimated location of the particular mobile node using the identified wireless fingerprint sample data.