[Talk-us] Problems with Tiger railroad data

Dylan Semler dylan.semler at gmail.com
Tue Jun 3 00:52:23 BST 2008


I've noticed some problems with the TIGER railroad data is imported to OSM.

1.  Spur designation inaccurate.  While the majority of the main lines seem
to be accurately labled as "rail", there are /many/ places where the
distinction between rail and spur is inconsistant (i.e.[1]).  I suggest we
either figure out how to fix this, replace all spurs in the US with rails,
or change mapnik, etc. to render spurs the same as rails.

2.  Railroads imported as roads.  I've found at least one instance of
this[2].  Browsing this location on the tiger browser shows it properly as a
railroad[3].  Any thoughts as to what could have happened or what can be
done to fix these?

What do people think?

[1]http://www.openstreetmap.org/?lat=41.33535&lon=-88.75081&zoom=15
[2]
http://www.openstreetmap.org/?lat=41.5629&lon=-89.0471&zoom=13&layers=B00FT
[3]
http://tiger.census.gov/cgi-bin/mapsurfer?act=in&infact=2&map.x=211&map.y=180&lat=41.5763359&lon=-88.9994125&wid=0.360&ht=0.130&iht=359&iwd=422&&on=CITIES&off=majroads&on=places&on=railroad&tlevel=-&tvar=-&tmeth=i&mlat=&mlon=&msym=bigdot&mlabel=&murl=&conf=mapnew.con
-- 
Dylan

Type faster. Use Dvorak:
http://dvzine.org
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