[stem-dev] Re: Air transport for world checked in

[James Kaufman <kaufman@xxxxxxxxxxxxxxx>]

Hi Stefan,

Can you send me the codes or IDs for
the locations with no centers? I can easily fix it.

We had code to do this manually but
I though Yossi  automatically computes the centers if they do not
exist.
Yossi, is this correct? If not I can
easily generate the missing centers.
Best Regards,
Jamie

IBM Almaden Research Center, 650 Harry Rd.
San Jose, CA 95120-6099
email: kaufman@xxxxxxxxxxxxxxx
phone: (408) 927-2477  (tie 457-2477)

Stefan Edlund/Almaden/IBM

05/28/2009 04:14 PM

To	stem-dev@xxxxxxxxxxx, James Kaufman/Almaden/IBM@IBMUS
cc
Subject	Air transport for world checked in

You need to run the ant script update.xml
under org.eclipse.ohf.stem.internal.data.geography.infrastructure.transportation
to build the models.

The air transportation edges won't show
up on the map when you select from the drop down. I narrowed down the problem
to the XXX_centers.properties files under org.eclipse.ohf.stem.data.geography/org.eclipse.ohf.stem.data.geography.centers.
 Some files are missing the center for level 0. For instance, I built
a model for scandinavia and none of denmark, sweden, norway or finland
had the level 0 center. It's required to draw the air transport edges.
Jamie, I think you generate these files, is it an easy fix?

Here is the the (now patched) file where
I got the original data from:


There's a utility that reads this file
and generates the .properties file used by the ant script.

Finally, some assumptions we might need
to look into:

Assume level 2 is county, level 1 is
state and level 0 is country

If we have admin level 2 data for a
region in the file above, these are the rules:

•         There's a 0 % chance that a flight departs and lands in the same county
•         There's a 5 % chance that a flight departs one county and lands in another county within the same state (intra-state)
•         There's a 50 % chance that a flight departs a county and lands in a different country (international)

If we only have admin level 1 data for
a region in the file above, these are the rules:

•         There's a 0 % chance that a flight departs and lands in the same state (intra-state)
•         There's a 2 % chance that a flight departs one state and lands in a differerent state in the same country (inter-state)

If we only have admin 0 data for a region
above, the rule is:

•         There's a 0 % chance that a flight departs and lands in the same country

The motivation being if we have less
data (fewer airports) it's likely it's a small country and most flights
are international.
Thanks,
/ Stefan


Stefan Edlund
Public Health and Computer Science Research
IBM Almaden Research Center 
(408) 927-1766   edlund@xxxxxxxxxxxxxxx

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