To provide an environmental information processing system or the like capable of generating accurately latitude information and longitude information in two-dimensional positioning.
This terminal device 20 has a regional environmental atmospheric-pressure information acquiring information storage means 110 for storing regional environmental atmospheric-pressure information acquiring information for acquiring regional environmental atmospheric-pressure information for showing a regional environmental atmospheric pressure corresponding to a specific position from an information providing device 70, an altitude difference information generating information storage means for storing altitude difference information generating information for generating altitude difference information based on atmospheric-pressure difference information, an atmospheric-pressure altitude information generating information storage means 112 for storing atmospheric-pressure altitude information generating information for generating atmospheric-pressure altitude information for showing an atmospheric-pressure altitude at the present position of the terminal device 20 based on the altitude difference information, an initial position information generating information storage means 114 for storing initial position information generating information for generating initial position information used for positioning by a positioning means 30 based on specific position information and the atmospheric-pressure altitude information, or the like.
Fujitsuna Hideyoshi
Osamu Suzawa