大规模栅格数据集的瓦片金字塔快速构建方法

An Efficient Method of Building Tile-pyramid for Massive Raster Dataset

高分辨率影像数据获取技术获得突破后,大规模栅格数据集的快速可视化成为GIS领域内亟待解决的问题,高效瓦片金字塔构建是实现影像数据快速可视化的关键技术。本文对业界常用的数据集可视化方法、流程和相关技术进行了研究,并针对大规模栅格数据集文件数目庞大的特点,提出一种多层级自适应的瓦片生成方法,优化了可视化引擎,实现了大规模栅格数据集瓦片金字塔的快速构建,具有较高的通用性和稳定性。

As the breakthrough of technology for data acquisition, fast visualization for massive raster dataset has become an urgent problem in the field of Geographic Information System（GIS） and the key technology of solving the problem is generating tiles pyramids efficiently. This article makes a brief study of the methods, mechanism and relative technology of dataset visualization which are widely applied in GIS community currently, then it puts forward a self-adaption multilevel tiles generating method taking the large number of files in massive raster dataset into particular consideration. With the optimized map rendering engine implemented, a fast tiles pyramid generation for massive raster dataset is demonstrated on the Web GIS platform. The method also shows acceptable applicability and stability.