The invention discloses an area measuring device for geographic
information planning, and relates to the technical field of
laser surveying and mapping instruments, the area measuring device comprises a base mounted on a tripod and a
machine body, a cavity is formed in the
machine body, a mounting ball is mounted in the cavity, a mounting cavity is formed in the mounting ball, a
laser transmitter is fixedly mounted in the mounting cavity, and the
laser transmitter is connected with the base. And a symmetrical optical bridge
assembly matched with the
laser transmitter is mounted in the mounting cavity. The device has the advantages that laser can be divided into a measuring
light beam and a reference
light beam, a real-time differential reference
system is formed, environmental interference is effectively counteracted, the measuring precision is remarkably improved, the coverage range of the measuring
light beam can be accurately adjusted, frequent movement of a
machine body does not need to be avoided, the working efficiency is greatly improved, in addition, the mounting ball can be automatically kept in a vertical state, and the working efficiency is improved. The problems of low manual leveling speed and large residual error are solved, and the accuracy is further ensured while the measurement convenience is improved.