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用计算机、绘图仪配套绘制与地图有关的图件,如点震中、应力场图等既准确又迅速。我们利用地图投影原理,用BASIC语言编写成DRMAP.BAS程序,共有四种投影方式(单、双标准纬线等角圆锥投影和单、双标准纬线等面积圆锥投影)可供选择,它们适用于中纬度地区。由于程序是根据投影原理采用解析法解算x、y坐标,所以准确度高。用此程序绘制的经纬线网格,与国家出版的地图完全吻合,且
With the computer, plotter mapping and map-related map, such as point epicenter, stress field map, etc. both accurate and rapid. We use the principles of map projection, written in BASIC language into DRMAP.BAS program, a total of four kinds of projection (single, double standard isometric conic projection and single, double standard latitude and other area conical projection) to choose from, they are suitable for Latitude area. Because the program is based on the principle of projection using analytic solution x, y coordinates, so the accuracy is high. The latitude and longitude grids drawn with this program exactly match the nationally published map, and