This regulation stipulates the principles and methods of applying remote sensing means when conducting regional environmental geological surveys (i.e., regional hydrogeological engineering geological environmental geological comprehensive surveys). Remote sensing work content and work procedures require remote sensing interpretation and field inspection work. Remote sensing map processing and comprehensiveness Requirements for interpretation principles and technical methods, data compilation results, review and acceptance, etc. This procedure is applicable to the regional environmental geological survey work with a basic scale of 1:50000 in urban areas and key areas for land development and economic construction planning. It is also applicable to hydrogeological engineering geological environmental geological survey work of 1:50000 1:100000.