The present application belongs to the field of surveying and mapping, and more particularly relates to a method for combined adjustment of island and
reef images and
laser height measurement under water edge line constraint. The present application comprises the following steps: S1, input of multi-source
satellite data; S2, extraction of water edge line points; S3, extraction of
photon points; S4, preparation for combined adjustment, including S41,
stereo image preprocessing, S42, generation of water edge line height control points, and S43, generation of
laser point height control points; S5, combined adjustment and compensation, comprising S51, combined adjustment, and S52, affine transformation compensation on the adjustment result. The present application introduces elevation constraints such as water edge line and fuses spaceborne
laser height measurement data to construct multi-source height control points, realizes high-precision three-dimensional mapping of sea
reef areas under the condition of no ground control, and thus more efficiently and stably solves the mapping problems of difficult acquisition of field control points, insufficient precision of
open source DEM, and uneven distribution of laser points.