By comparison of current layout, original planning and improvement proposal, GIS's advantage in public facilities planning is certified.
通过对学校的现状分布、规划以及改进方案三者的比较，证明了GIS在公共设施规划中的优越性。
2
The prices that are relevant in this comparison are net of transportation costs: those actually or implicitly charged at the gates of the firm's production facilities.