The object motion was represented using hierarchical data structure of quad tree.
采用四叉树的层次数据结构来表示物体运动。
Each node represents one DEM data block. According this separation, by quad-tree data structure can get global different resolution DEM data storage architecture.
每个结点表示一个DEM数据分块，根据如此剖分，由这棵四叉树结构就得到全球范围不同分辨率的DEM数据存储结构。
The generation algorithm of adaptive mesh which is based on the quad-tree data structure is presented.
以四分树为数据结构，建立了网格细分法生成自适应网格算法。
The unique properties of quad tree data structure and divided pyramid image into partitions by using quad tree methods;
四叉树数据结构的特性与其邻域寻找算法，并将多分辨率影像数据按照四叉树结构进行分块处理；
QR-tree, a spatial index structure based on R-tree and a kind of space partition method using Quad-tree, is proposed. Its data structure and algorithms are also stated.
提出了一种基于R-树与“四叉树”空间层次划分的空间索引结构QR-树，给出了其数据结构和算法描述。
QR-tree, a spatial index structure based on R-tree and a kind of space partition method using Quad-tree, is proposed. Its data structure and algorithms are also stated.
提出了一种基于R-树与“四叉树”空间层次划分的空间索引结构QR-树，给出了其数据结构和算法描述。
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