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I have been requested to show on a geographic map the volume (in meters cubed m3) of freight (parts) that ship to various cities (Canada/USA). The idea is to show which cities receive the most freight by volume.

Presently the only mapping tool I have accessible is Microsoft Mappoint 2002.

Is there another webbased tool that I could use that does a good job of showing volumes relative to each other? Mappoint has a feature to show sized pie charts - is the best type of method of showing total volume by city along with the individual contributors?

Update1:

I am not trying to show the flow of parts - only the size of origin and destination. For example does Toronto, Ontario have 100m3 of parts and Buffalo, New York only 30m3 of parts?

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  • @whuber - I didn't even realize there was a GIS site! – John M Mar 16 '12 at 19:50
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You need flow mapping software. There's a list of free* tools at the end of that Wikipedia entry. I heard good things about JFlowMap, but I have not used it myself.

*Depending on commercial use, in some cases.

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  • I thought that "along with the individual contributors" means that he has the origins. – Dimitriy V. Masterov Mar 16 '12 at 14:52
  • Depends if you interpret "individual contributors" as places or as "freight(parts)". Regardless, the OP needs to further clarify. – Andy W Mar 16 '12 at 15:14
  • Makes sense. Thanks! Totally agree on the clarification. – Dimitriy V. Masterov Mar 16 '12 at 15:16
  • John, you can use QGIS plugin FlowMapper to depict inter nodal mass flows. Check the plugin from the repo: plugins.qgis.org/plugins/FlowMapper – cempro Jul 12 '13 at 7:17

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