Abstract: It is difficult to measure the intertidal zone used conventional method in the topographic survey. In pres
ent study, we used laser range sensor and RTK GPS with a self-developed Unmanned Aerial Vehicle ( UAV) plat
form to obtain 3D topographical data. By comparing the results of UAV laser measurement with artificial field meas
urement, we found that UVA technique has met the technical requirements of sea topographic surveys. Using UAV 
laser measurement technology, project team has got 3D topographical data and photographs according to the specifi
cation on several coves of 25 km2 areas near Xinghua Bay during the low tide period of spring tide. The quality inspection on 3D topographical data of several coves showed that the results of UAV laser measurement could meet the
 specification requirements. Thus, the UAV laser measurement technology shall have a good practicability in the 
wide coastal zones in China.