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[aprssig] Traffic info in APRS

Mark Earle wa2mct at mearle.com
Tue Apr 5 20:16:17 UTC 2005


At 03:18 PM 4/5/2005 -0400, you wrote:
 >Anyone know of an easy way to derrive lat/lon from State, Interstate and mile
 >marker? Is this info available in a table somewhere or a way to build a 
table?

I've not seen it for Texas, either. However, you could for a small set of 
data, manually build a table.

Street Atlas has the mile markers available. I would bet other map programs 
do also. Hmm, so it might be in the Tiger data those maps are based on.

Anyhow, in Street Atlas (versions 9 and earlier), you just hover the 
pointer over a mile marker, and the status bar returns lat/lon.

See also:
http://oahumpo.org/T6EJ/Final2001/Final_Appx_D.PDF

Try google for "tiger maps mile markers" for some more info. Remember Tiger 
data may be in "unexpected" datums.


 >
 >Much of the information on the TN DOT web site gives mile marker info.
 >
 >I have not found TDOT to be uncooperative, but they are not sure how they
 >could give me the information that I am asking for (and I have not even asked
 >for anything specific); I got a similar response - we'll look into it.
 >
 >On Tue, April 5, 2005 2:55 pm, Wes Johnston said:
 >> The SC DOT has a site that is pretty static, but it does give road
 >> closures for planned work....
 >> http://www.scdot.org/getting/roadcloselist.asp?distid=1 for example....
 >>
 >> I just contacted someone there, and he was somewhat flabbergasted when I
 >> asked it they could include lat/lon on the webpage.  The problem it
 >> seems is when their road crews enter this information, they don't know
 >> the lat/lon.  I explained to him that we have a way of getting NWS
 >> watches and warnings into "our system" (I did not use the term APRS),
 >> and we'd like to beable to use his data as well.  What I got was "well
 >> I'll look into it", and when I offered my phone number and asked when I
 >> should call back, he reiterated "I'll look into it".  So, nothing but
 >> cooperation from 1/50th of the country's DOTs.
 >>
 >> Unfortunately, the best thing I can think of to do since there is no
 >> rhyme or reason for the freely entered text they use to describe the
 >> locations, is to run a cron script on the web pages every day and have
 >> that script email me when the page changes so I can _manually_ create an
 >> object.   bummer!
 >>
 >> Wes
 >>
 >> _______________________________________________
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 >> aprssig at lists.tapr.org
 >> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
 >>
 >>
 >
 >
 >--
 >William McKeehan
 >KI4HDU
 >Internet: mckeehan at mckeehan.homeip.net
 >http://mckeehan.homeip.net
 >
 >_______________________________________________
 >aprssig mailing list
 >aprssig at lists.tapr.org
 >https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig

       ) )    de WA2MCT Mark
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