基于CAC的一类通用多焦点地图投影

本文从新的角度提出了一类在计算机辅助制图情况下具有灵活、通用性的多焦点地图投影方法。介绍了这种方法的原理、给出了若干可满足用户复杂需求的投影公式及其相应的算例。利用本文提出的方法,不仅能够概括或产生大部分现有的变比例尺、多焦点地图投影,而且可以获得更为广泛的结果。

A CAC-based General Multi-focal Projection

Viewing from a new angle, the authors of this paper put forward a CAC-based general multi-focal projection with much flexibility and universality. In addition to an introduction to the basic principle, the paper offers a few projection formulas which satisfy the complex demands of users, and some corresponding examples shown by sketches as well. The authors hold that most existing variable-scale projections and multi-focal projections can be generalized or generated by employing the proposed method, and that wider applications can also be made.