[Geowanking] Map Image APIs

Wed Apr 25 08:54:32 PDT 2007

No, enumerators use hand-helds with GPS, to make sure they are in their
assigned areas and to capture coordinates of living quarters or return to
them for follow up.  Enumerators are hired to work in areas they know well,
reducing their need to use GPS navigation.

Charles Dingman, Geographer/301-763-1120
4H040, Geography Division
US Census, 4600 Silver Hill Rd Stop 7400
Washington, DC 20233-7400

             Joshua Lieberman                                              
             <josh at oklieb.net>                                             
             Sent by:                                                   To 
             geowanking-bounce         bitner at gyttja.org,                  
             s at lists.burri.to          geowanking at lists.burri.to           
                                                                        cc 

             04/25/2007 11:14                                      Subject 
             AM                        Re: [Geowanking] Map Image APIs     

             Please respond to                                             
             geowanking at lists.                                             
                 burri.to                                                  

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, charles.e.dingman at census.gov <
      charles.e.dingman at census.gov> 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)"              <tomlong at gmail.co
        To              m>                        geowanking at lists.burri.to
                     Sent
        by:
        cc               geowanking-bounce              s at lists.burri.to
        Subject                                        Re: [Geowanking] Map
        Image APIs                04/24/2007 05:09              PM   
        Please respond to              geowanking at lists. 
        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 < pramsey at refractions.net> 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
             pramsey at refractions.net
             Phone: 250-383-3022      Cell:
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