勘探决策支持系统坐标变换技术

Coordinate transformation technique and its application in Exploration Decision Support System

胜利油区勘探决策支持系统需要处理和应用不同坐标系统下采集的数据,同时需要对扫描输入的图形进行校正处理,以便满足勘探论证的要求。从坐标变换的基础理论出发,对相同基准和不同基准下的坐标变换进行了研究,建立了坐标转换流程。提出了平面图形校正的4点法,并编写了相应的软件模块。在把虚拟坐标图件校正成可用的实际坐标图件,或普通位图格式图件的矢量化等方面有广泛应用。不但在实际应用过程中证明了该方法的正确性,而且在地质综合研究和勘探部署上具有很高的实用价值。

Data collected in different coordinate systems and maps in varied formats have to be processed to meet the requirement of geologic demonstration and comprehensive research in exploration in the Exploration Decision Support System developed by Shengli Oilfield.According to the basic theory of the coordinate transformation in the same system and among different system,a coordinate conversion program was designed and the plan map correction formula was derived.A correction method was developed using four points as reference and the corresponding software module was programmed.The technique can correct virtual coordinate map to available actual coordinate map,and can make common bit map vectorization.All the methods have been proved correct in practices.And all the modules have been integrated into the Exploration Decision Support System and been widely used with satisfactory results.