The location of a pointfeature, such as a bore hole , can be described by a single x, y coordinate.
线特征,例如公路和河流,可以被存储于一系列的点坐标。
2
In case some results are displayed on GUI, it's easy to compare the actual values with the expected values by using the verification pointfeature.
如果有一些结果会显示在GUI中,那么通过使用验证点特性,就可以很容易地比较实际值和预期值了。
3
CAD data are a main data source of GIS, and many problems will come forth when they are converted into GIS format, including losing block information, or pointfeature changed.