I have to wonder what commercial dataset Census are then going to
purchase in order to route their enumerators. Oh, I'm sorry, they are
going back to paper, aren't they?.
Josh
On Apr 25, 2007, at 11:03 AM, David William Bitner wrote:
Charles,
I understand that routing improvements are not in the budget as
they are not required for any Census operations. However, The
Census Bureau must realize that they produce the only publicly
available nationwide dataset of this type that has far broader
applications than their own internal business needs. What can we
do as a community to try to help secure funding or to create
relationships with other government agencies (federal or otherwise)
to whom these enhancements would be valuable? With a dataset as
import as this street data is, we need to make sure that we keep
the blinders off.
David
On 4/24/07, [EMAIL PROTECTED] <
[EMAIL PROTECTED]> wrote:
I don't think there will be any further releases of TIGER/Line
Files (see
http://www.census.gov/geo/www/tiger/future/future_tl.html), though the
information will be released in several other forms, once or twice
a year.
The underlying database will have more accurate coordinate
information for
more counties, as the MAF/TIGER Accuracy Improvement Program
completes, but
new data that would help with routing, such as turn restrictions,
speeds,
and one-way streets, are not included. They are not in the budget,
and not
required by any planned operation that would justify them in the
budget.
Charles Dingman, Geographer/301-763-1120
4H040, Geography Division
US Census, 4600 Silver Hill Rd Stop 7400
Washington, DC 20233-7400
"Tom Longson
(nym)"
<[EMAIL PROTECTED] To
m> [email protected]
Sent
by: cc
geowanking-bounce
[EMAIL PROTECTED]
Subject
Re: [Geowanking] Map Image APIs
04/24/2007 05:09
PM
Please respond to
[EMAIL PROTECTED]
burri.to
>From what I understand using TIGER for routing is a bad idea
because TIGER
doesn't say which roads are one way, on ramps, off ramps, etc.
Could be
potentially dangerous, although very cool regardless. I personally
love
this...
"Graphserver will return an itinerary between any two connected
vertices,
even if the itinerary is absurd. In this case traveling by bus and
foot
from downtown Seattle to deep within the foothills of the Cascade
Mountians
involves an eight-hour hike from one of the most remote bus stops
in the
county." - http://graphserver.sourceforge.net/img/
absurd_route_large.png
Anyone have info when the next release of TIGER is expected, and if
it will
have more data to solve some of these routing problems?
Tom Longson
________________
CAR&D / Cars.com
On 4/24/07, Paul Ramsey < [EMAIL PROTECTED]> wrote:
Ryan Sarver wrote:
> We run mapserver internally and I was trying to avoid it as a
> consumer-facing app could be pretty taxing on the system. It's
much
more
> fun to use someone else's resources :). But its sounding like that
might
> be my best bet.
Robust at a software level, not so much at a "good answers"
level. Using
TIGER for routing is contraindicated.
--
Paul Ramsey
Refractions Research
http://www.refractions.net
[EMAIL PROTECTED]
Phone: 250-383-3022
Cell: 250-885-0632
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