Local Analysis Method on the Marine Gravity Matching Area Based onSkeleton Extraction

Objective Considering the accuracy of gravity matching is influenced by heading and gravity field,thestatistical characteristics of the gravity field are calculated by a moving window to select a gravitymatching area,and the correlation between the accuracy of gravity matching and carrier heading isconfirmed.Then,the skeleton points of matching areas are extracted by a fast Euclidean distance fieldalgorithm and a simplification algorithm to form local areas with their distance values,so by calculat-ing the gravity statistical characteristics of these local areas,the carrier can select headings with highgravity matching accuracy.Finally the validity of this analysis method is verified with simulation re-sults.