Up to now

the problem on tidal mud flat topometry has not been solved well. According to the covering characteristics of tidal mud flat which is different from ocean and land as well. This paper presents a metod that combines bathymety with aerial photogrammetry. Its characteristics is that the horizontal position of the tidal flat topometry is dealed with aero-topographic technology

and the elevation is based on the original bathymetric data which has been corrected from the datum. The test results show that

on a tidal mud flat topographic map of 1:50000 with contour interval of one meter

the elevation error is 0.38 meher.