Design of High-precision Island WebGIS Based on Cesium

Abstract

In this paper, the design of a high-precision WebGIS system for island application is presented. The system is developed based on Cesium to support 2D, 2.5D and 3D map capabilities, and provide networked comprehensive geographic information service. Concerning the practical requirements for complicated configuration of island surface, improved methods for interpolation correction, data structure optimization, visible analysis and island path planning are introduced to improve system accuracy and performance. The system adopts B/S architecture and modular development ideas for easier access and further updates. The main functional modules of the island WebGIS provide basic operations, including multi-dimensional scene browsing, base map switching, multi-control operation, layer plotting, contour line, intervisibility and terrain factors measurement. Besides, the characteristic functions of key techniques such as profile analysis, viewshed analysis, and island path planning are implemented. The test examples show that the overall functional performance of the system is satisfactory for island 3D GIS service.