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Re: table of US states' neighbours

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Michael Fuhr wrote:
On Thu, Mar 27, 2008 at 06:00:57PM -0400, Colin Wetherbee wrote:
brian wrote:
I'd like to add a table, state_neighbours, which joins each state with all of its neighbour states. Does anyone know where I can find such a list?

I'm not interested in "nearest neighbour", just any connected state.
That sounds like something you could create in 20 minutes with a map.

Or a few minutes with shapefiles and PostGIS, using the latter's
spatial functions to identify geometries that touch.  Below are the
results of such an operation; I haven't verified the entire list
but I did check a few and they were correct.


Brilliant, thanks. Yes the PostGIS angle is why i asked on this list. I figured that this info must be readily available. Now google will pick it up for the next bloke.


AL|{FL,GA,MS,TN}
AR|{LA,MO,MS,OK,TN,TX}
AZ|{CA,CO,NM,NV,UT}
CA|{AZ,NV,OR}
CO|{AZ,KS,NE,NM,OK,UT,WY}
CT|{MA,NY,RI}
DC|{MD,VA}
DE|{MD,NJ,PA}
FL|{AL,GA}
GA|{AL,FL,NC,SC,TN}
IA|{IL,MN,MO,NE,SD,WI}
ID|{MT,NV,OR,UT,WA,WY}
IL|{IA,IN,KY,MI,MO,WI}
IN|{IL,KY,MI,OH}
KS|{CO,MO,NE,OK}
KY|{IL,IN,MO,OH,TN,VA,WV}
LA|{AR,MS,TX}
MA|{CT,NH,NY,RI,VT}
MD|{DC,DE,PA,VA,WV}
ME|{NH}
MI|{IL,IN,MN,OH,WI}
MN|{IA,MI,ND,SD,WI}
MO|{AR,IA,IL,KS,KY,NE,OK,TN}
MS|{AL,AR,LA,TN}
MT|{ID,ND,SD,WY}
NC|{GA,SC,TN,VA}
ND|{MN,MT,SD}
NE|{CO,IA,KS,MO,SD,WY}
NH|{MA,ME,VT}
NJ|{DE,NY,PA}
NM|{AZ,CO,OK,TX,UT}
NV|{AZ,CA,ID,OR,UT}
NY|{CT,MA,NJ,PA,VT}
OH|{IN,KY,MI,PA,WV}
OK|{AR,CO,KS,MO,NM,TX}
OR|{CA,ID,NV,WA}
PA|{DE,MD,NJ,NY,OH,WV}
RI|{CT,MA}
SC|{GA,NC}
SD|{IA,MN,MT,ND,NE,WY}
TN|{AL,AR,GA,KY,MO,MS,NC,VA}
TX|{AR,LA,NM,OK}
UT|{AZ,CO,ID,NM,NV,WY}
VA|{DC,KY,MD,NC,TN,WV}
VT|{MA,NH,NY}
WA|{ID,OR}
WI|{IA,IL,MI,MN}
WV|{KY,MD,OH,PA,VA}
WY|{CO,ID,MT,NE,SD,UT}


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