hydrologic survey in aerial photograph
Aerial Survey
航空测量
航空摄影测量（航测）
空中测量
空中探勘
航空摄影测量
航测
送电线路
航摄
Aerial survey precision
aerial survey topographical map
crown closure measurement in aerial photo
crown diameter measurement in aerial photo
delta air aerial survey
tree height measurement in aerial photo
connection survey in mining panel
flow survey in open channel
geological resource survey in cities
geological survey in cities
Land survey in rural area
Large-scale Forest Damage Survey in Europe
seismic survey in mountainous area