Geographic Information Systems Stack Exchange is a question and answer site for cartographers, geographers and GIS professionals. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

This question already has an answer here:

I'm trying to map the volume of people traveling from various cities to popular mountain towns in British Columbia. I have a .csv containing the starting point, ending point and number of travelers. There must be a way to show the volume of travel (thickness of line, or colour coded) from place to place using city layer polygons and a road network layer. Any help would be much appreciated! Thanks! CHeers, Luke

share|improve this question

marked as duplicate by whuber Apr 25 '13 at 14:25

This question was marked as an exact duplicate of an existing question.

Welcome to SE.GIS forum. Which software you are using to show the map? for ex. QGIS or ArcGIS thanks.. – Sunil Apr 25 '13 at 6:08
To add to what @Sunil is saying, you can also do it with Google Earth or a web interface. But we need to know your platform. If you don't have one, then please indicate that as well – dassouki Apr 25 '13 at 14:22
i am using qgis – user17543 Apr 25 '13 at 21:42

We have done so using our RW Net 4 package for calculating flow from your CSV-data and then used line thickness for illustration of volume. In this example all flows are from a single location:

share|improve this answer
Which algorithms are you guys using for Route assignment? – dassouki Apr 25 '13 at 14:23
We are using A*. – Uffe Kousgaard Apr 25 '13 at 15:24
I dont really care about the route, as travel is over a considerable about of distance with limited route options. I am using QGIS, is there a to do that in this? – user17543 Apr 25 '13 at 21:50

Not the answer you're looking for? Browse other questions tagged or ask your own question.