[pgrouting-users] TIGER/Line ZLevel

Stephen Woodbridge woodbri at swoodbridge.com
Mon Feb 8 21:36:13 EST 2010

On 2/8/2010 11:00 AM, Daniel Kastl wrote:
> Has the OSM data been improved after Tiger data has been imported?
> I can't say I know well about TIGER data as Stephen does, but since
> OSM data contains Tiger data it might be an option, I thought.
Daniel, John,

This is a good idea. I do not know what the state of the OSM data is but 
this would be a good place to add that information. Last I knew there 
was a lot of discussion about how to handle routing related data in OSM, 
but I have not stayed on top of that. The best place to ask about this 
would be the OSM list.


> Daniel
> 2010/2/9 Stephen Woodbridge<woodbri at swoodbridge.com>:
>> On 2/7/2010 5:24 PM, John Hennessy wrote:
>>> I am trying to use the TIGER/Line shapefiles for routing.  I have
>>> managed to import the data and generate routes.  Unfortunately it
>>> looks like this data set does not include ZLevel information so I am
>>> getting routes that would have me drive off overpasses etc.  Anyone
>>> have a solution to this?
>> There is no solution to this problem that I'm aware of and I have worked
>> extensively with the Tiger data over the last 10-12 years. The data does
>> not exist in the Tiger data set, unfortunately. You will also note that
>> one-way road information does not exist, so you are likely routing down
>> the wrong side of dual lane digitized interstates also.
>> -Steve W
>>   http://imaptools.com/
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