NET will retrieve data from the cache, which you can verify by noting that the time on the page does not change.
NET将从缓存中检索数据，这可以通过观察页面上的时间不改变来加以验证。
Spatial information analysis: to change from vector format to grid format, buffering section analysis, spatial data overlap analysis, net analysis, etc.
空间信息分析：包括矢量转栅格、缓冲区分析、空间数据的复合分析、网络分析等。
If the system is connected to real data, it will change the graphics automatically, namely, print the color of the net, analyse which part is electriferous, alert of loads.
系统可以通过数据库接口和实时数据建立连接，自动对实时数据的变化作出反应，如：网络着色、带电分析、负荷报警等功能。
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