The Probing of GPS/INS Filter in Land- based MMS

Land-based MMS(Mobile Mapping System) is a 3S(GPS,GIS,RS) integrated surveying system to fulfill the real-time and periodic data collection for modern surveying engineering and GIS.The error of MMS is composed of 8 types of different errors.One main measuring error is vehicle-positioning error.This paper discussed this error in order to improve the precision of mapping.The so-lution of vehicle positioning used new filter model for GPS/INS system.The models have actual meaning for Land-based MMS fulfilling the requirement of large-scale mapping.