TRANSCAD教程2：The Miasma Beach Transportation Model

GIS Concepts

What is a *.map file?
A *.map file contains information about the settings of the map such as, what layers are in the map, the color and style of each layer, texts, labels, and freehand items (markers) on top of the map, and the scale of the map. It is important to know that the *.map file itself does not contain databases of the layers. It only tells transcad where are the databases and how to display them. Without the geographic files, the map file alone can not generate maps.

1.2 Network Updates

Select Highways/Streets as the Working Layer. Implement all network changes identified below. Adjust the attributes for all links accordingly.

1. Delete the section of Miasma Boulevard between 3rd and 4th Streets (over the Miasma wetlands)
2. Delete the section of 2nd Street between Miasma Blvd. and Mountain Avenue.
3. Add a section of 4th Street between Coast Highway and Miasma Blvd.
4. Add a section of 3rd Street between Miasma Blvd. and Mountain Avenue.
5. Due to recent development changes, the centroid of Zone 3 along with its connector have changed. Change the connector so that it connects with Coast Highway instead of 3rd St. It should meet the highway 1.5 miles from 1st St and 1.5 mile from 4th St.
6. All Miasma network links are secondary arterials with the exception of:
   1. Mountain Ave from node 310 to 345 is a local street
   2. 3rd Street from Coast Highway to Miasma Blvd. is a local street
   3. The entire length of Coast Highway is a primary arterial

1.2.1 Delete Links
To delete a link, go to Tools / Map Editing. The Map Editing tool box will

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