The purpose of this paper is to describe a research undertaken to develop a conceptual framework of telephotogrammetry based on concepts such as telegeoprocessing, mobile photogrammetry, geomobility and web services. In order to be operational, telephotogrammetry requires a combination of four different facilities: imaging, positioning, networking and computing. It consists of a hand-held mobile mapping system ready to acquire, visualize and to transfer spatial information through the web. The system includes also specialized servers communicating with the hand-held device and devoted to store the data and perform high intensive. Based on a technological assessment, hardware component and software architecture were identified to fulfil the requirements for telephotogrammetry. Preliminary results show that hardware components are not entirely suitable. In particular, network performance is still a severe drawback for the transfer of information, i.e. image data. However software architecture is already available on the market and provides good perspectives in term of human-machine interaction and task automation.