Name : Leung Chuk Kwan Fan Shuk Man
Student ID : 98518901 997767
Course : GEO 2105 Geographic Information System
Lecturer : Prof. Hui Lin
Tutor : Mr. Joshua Hui
Laboratory Practical 5 Assignment
"John lives in Shatin but still work in Central. In order to have cheapest and tiem-saving trip to work, John is so worry now. Suppose you are John's friend and would like to give him a hand. And you believe that GIS can be very helpful in the trip planning."
Both on the conditions above, submit the following:
In order to use GIS software to generate a cheapest and time-saving trip from Shatin to Central, data needed includes the Hong Kong map in digital format, the transportation system of Hong Kong (buses, trams, KCR, MTR) and the associated cost and travelling time of each kind of transport. The residential address and the office address have to be converted into point locations using geocoding. A digital highway map will provide the topological network structure to determine the routing. The average travelling time for each road segment should be added in the attribute table.
Having the detail of the road network and the transportation system, at the beginning of the GIS analysis, we should first enable the network analyst function. Then we can identify the T-node and F-node of each kind of transports and set the "rules of the road" such as speed limits, one-way streets, prohibited turns, closed streets, streets to avoid, and overpasses and underpasses. Routines of different transport mean would also be edit during the process.
We then merge different transportation routes into one complicated transport system, so that the interchange of the different transport mean can be done in the GIS program. Before we can start the analysis, we should first determine the different combination of the transportation mean that John can take. There are several possibilities, the combination of bus and MTR, bus and bus, KCR and MTR, KCR and bus.
Therefore, we can determine where to take the interchange of transport means, by specifying the start points and the interchange stations, we can find different routes to take the interchange stations, using the closest facility function to generate all the possible routes. Then we can specify the interchange locations as the starting point and the office location as the end point. Now we have a number of routes that are divided into 2 segments indicating the interchange of 2 kinds of transports, we need to edit them into one routine, so that we can determine the cost and the travelling time for the combinations.
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