Dear R Group Users:
If there is a resource or easy way to calculate the distance
between zipcodes, for example, if I have the zipcode for 200 patients,
and the zipcode of a hospital, how to calculate the travel distance of
these individual patient to the hospital based on the zipcode. Your
input will be greatly appreciated.
Thanks and regards,
XING
Gabor Grothendieck
2010-Dec-08 15:50 UTC
[R] GIS Help: distance calculation based on ZIP Code
On Wed, Dec 8, 2010 at 10:41 AM, XINLI LI <lihawaii at gmail.com> wrote:> Dear R Group Users: > > ? ?If there is a resource or easy way to calculate the distance > between zipcodes, for example, if I have the zipcode for 200 patients, > and the zipcode of a hospital, how to calculate the travel distance of > these individual patient to the hospital based on the zipcode. Your > input will be greatly appreciated. >Try the R-Sig-Geo list. -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com
----------------------------------------> From: ggrothendieck at gmail.com > Date: Wed, 8 Dec 2010 10:50:40 -0500 > To: lihawaii at gmail.com > CC: r-help at r-project.org > Subject: Re: [R] GIS Help: distance calculation based on ZIP Code > > On Wed, Dec 8, 2010 at 10:41 AM, XINLI LI wrote: > > Dear R Group Users: > > > > If there is a resource or easy way to calculate the distance > > between zipcodes, for example, if I have the zipcode for 200 patients, > > and the zipcode of a hospital, how to calculate the travel distance of > > these individual patient to the hospital based on the zipcode. Your > > input will be greatly appreciated. > > > > Try the R-Sig-Geo list.Data sources do come up here a bit so I will comment that you can get line-oriented lists of post office locations and more from the census. The TIGER files would let you find streets etc but are probably too big for hosting yourself. IIRC, I had to cobble together the zipcode locations but the data is available. Probably you need more resolution and other things like traffic data to make a routing decision but I would mention the landmarks DB probably does have hospitals listed. Also, distances are short enough that "as the crow flies" you could probably linearize and use scaled x*x+y*y instead of the spherical stuff. I may have put it up here along with other illustrations of things you can do with public data, http://www.spottext.com/marchywka/distroform.cfm ( I would caution this site is not exactly professional but it may be informative, I am using it for idea testing etc )> > -- > Statistics & Software Consulting > GKX Group, GKX Associates Inc. > tel: 1-877-GKX-GROUP > email: ggrothendieck at gmail.com > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
Thank you very much, I will look into it. Best, xing On 12/8/10, Mike Marchywka <marchywka at hotmail.com> wrote:> > > > > > > > > > > > > ---------------------------------------- >> From: ggrothendieck at gmail.com >> Date: Wed, 8 Dec 2010 10:50:40 -0500 >> To: lihawaii at gmail.com >> CC: r-help at r-project.org >> Subject: Re: [R] GIS Help: distance calculation based on ZIP Code >> >> On Wed, Dec 8, 2010 at 10:41 AM, XINLI LI wrote: >> > Dear R Group Users: >> > >> > If there is a resource or easy way to calculate the distance >> > between zipcodes, for example, if I have the zipcode for 200 patients, >> > and the zipcode of a hospital, how to calculate the travel distance of >> > these individual patient to the hospital based on the zipcode. Your >> > input will be greatly appreciated. >> > >> >> Try the R-Sig-Geo list. > > Data sources do come up here a bit so I will comment that you can > get line-oriented lists of post office locations and more from the > census. The TIGER files would let you find streets etc but are probably > too big for hosting yourself. IIRC, I had to cobble together the zipcode > locations but the data is available. Probably you need more resolution and > other things like traffic data to make a routing decision but I would > mention > the landmarks DB probably does have hospitals listed. Also, distances are > short > enough that "as the crow flies" you could probably linearize and use scaled > x*x+y*y instead of the spherical stuff. > > I may have put it up here along with other illustrations of things > you can do with public data, > > http://www.spottext.com/marchywka/distroform.cfm > > ( I would caution this site is not exactly professional but it > may be informative, I am using it for idea testing etc ) > >> >> -- >> Statistics & Software Consulting >> GKX Group, GKX Associates Inc. >> tel: 1-877-GKX-GROUP >> email: ggrothendieck at gmail.com >> >> ______________________________________________ >> R-help at r-project.org mailing list >> https://stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide >> http://www.R-project.org/posting-guide.html >> and provide commented, minimal, self-contained, reproducible code. >