Quadtree-based image compression formats and level-of-detail systems all work this way. Satellite imagery, terrain rendering, and geographic information systems use quadtree decomposition to serve data at varying resolutions: zoomed out, you see large coarse blocks; zoomed in, you see fine-grained tiles. The same principle extends to three dimensions (octrees) for volume rendering and 3D spatial indexing.
FT Digital Edition: our digitised print edition
。业内人士推荐搜狗输入法下载作为进阶阅读
It was his colleague Pete Manning who encouraged him to seek help after noticing his friend seemed to be struggling.
第一条 为了维护社会治安秩序，保障公共安全，保护公民、法人和其他组织的合法权益，规范和保障公安机关及其人民警察依法履行治安管理职责，根据宪法，制定本法。
Tony Jolliffe/BBC News