【摘要】 利用MapBasic编制震害评估软件时 ,无现成的工具直接绘制出长短轴不平行 (或不垂直 )于经纬度线的等烈度线。本文提出了一个通过椭圆旋转绘制出所要求的等烈度线椭圆的方法。更多还原

【Abstract】 When the Map Basic is used to design an earthquake damage assessment program,no existing means can be used to draw isoseisms the major axes or minor axes of which are not parallel(or perpendicular) to the longitudes or latitudes directly A method which can be used to draw such isoseism ellipses through rotation of ellipses has been suggested in the present paper更多还原