1·The sampling density can be controlled according to the practical requirement during the course of contour line vector.
在等高线的矢量化过程中，可根据实际需要对采样密度进行控制。
2·Data quality control is very important during the collection GIS basal data. It mainly introduces a method that applies rarefies and smooth to the automatic forming contour line.
在GIS基础数据的采集过程中，数据质量的控制非常重要。介绍了对自动生成的等高线进行圆滑和抽稀处理的一种方法。
3·The principle of image moire, the calculation method and testing method of the contour line are discussed, and some application examples in medicine are given.
介绍影像云纹产生的机理，等高线的计算公式、测试方法，并给出在医学中应用的部分实例。
4·It mainly introduces a method that applies rarefies and smooth to the automatic forming contour line.
介绍了对自动生成的等高线进行圆滑和抽稀处理的一种方法。
5·But this measurement can only obtain the integer grade fringe's contour line, the precision is constrained.
但该方法只能得到整数级条纹的等高线，精度受到制约。