勘探部署图的多分辨率模型及其实现

利用地质勘探数据生成多比例尺图在勘探部署图的绘制与管理中具有重要意义。在分析构成勘探部署图数据元素特点的基础上,提出了不同比例尺图件的多分辨率模型。该模型保存了勘探图的不同比例尺下的数据,在应用中能根据不同的比例尺要求生成满足要求的图件,同时给出了模型的数据结构。结果表明,基于有向无环图(DAG)表示的数据抽取算法利用变化数据的空间关系能够提高计算性能,且算法的计算时间与变化数呈线性关系。

A multiresolution model for explore array maps and its application

It is significant to draw and manage explore array maps with multi-scale using geophysical data. On the basis of analyzing the characters of data elements forming maps, a multiresolution model of maps with variable scale was presented. By means of the variable scale data saved in the model, multi-scale map can be generated according to the requirement. A data structure to encode the model was given. The experimental results show that the algorithm based on directed acyclic graph (DAG) by the spacial relation among changing data can improve computing performance of an extraction of graphical data. The linear relation between computation time and variation number was obtained.