Fast developing technologies have a very big influence on a develop of geographic information systems. It is a reason why terrain and office works have been recently integrated, and so costs decrease and effectiveness increases. Mobile computers usage, GPS measurements develop, Internet everywhere and wireless connections are examples of a new technology used nowadays. The aim of the paper was to get to know possibilities of mobile GIS usage as a tool of data acquisition in Real time. Technology of data acquisition and necessary equipment and software was presented. Two examples of mobile GIS (so cooperation of GIS and satellite measurement) were showed as well. On the basis of presented methods a comparison of costs, effectiveness and precision of nowadays available methods was made. Analyses let the author draw a conclusion connected with wider usage of mobile GIS.

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