As a self-study of one (for example, information equipment 100 3), 100 1, 100 2 (information equipment surveyed the other it is placed around the self out of the (100 1-100 6 information devices) surveyed more than one , a self-centered arrangement information describing the layout status based on the distance the distance calculation unit that calculates using radio waves the distance between the 100 4-100 6) and (104), and the study of other self-centering self-centered placement information collection unit that self-centered arrangement information generation unit for generating (105), to collect the self-centered placement other information that is generated each surveyed side of the other (106), self-centered arrangement information generating unit ( spatial location information generated to bind on the basis of the distance between self-centered arrangement information generated at 105), and a self-centered arrangement other information that has been collected to generate a spatial arrangement information describing the layout of the investigation of several I'm with section (107).
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