A System for Automatic Cartographic Sounding Selection

摘要

Soundings on nautical charts provide information about the shape of ocean bottom between chart depth curves. A single chart may have thousands of soundings posted on it. This paper describes a system for automatic cartographic sounding selection. In this system, a new algorithm for automated selecting soundings is developed. The algorithm is employed in such a way that it can guarantee (a)fast and accurate selecting sounding;(b) processing the circular depth curves;(c) solving the overplotting problems between depth curves and soundings;(d)keep selected soundings more 'pretty'. The system is intensively tested using real data sets and its superiority has been revealed by the testing results.