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RE: Feedback from OGC members on FIPS query to obtain geometry (polygon) for use in CAP demonstration

  • 1.  RE: Feedback from OGC members on FIPS query to obtain geometry (polygon) for use in CAP demonstration

    Posted 08-27-2003 00:45
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    Subject: RE: Feedback from OGC members on FIPS query to obtain geometry (polygon) for use in CAP demonstration


    After our teleconference today, I put out a query to the OGC membership
    asking if there are any web accessible services/portals out there that could
    be accessed using some level of query, such as a FIPS code, and have a
    geometry returned. (In OGC parlance, geometry = coordinate set for a given
    geographic entity. Not to be confused with a feature, a feature collection,
    or a geometry collection :-) )
    
    In a couple of hours, I received half a dozen responses. There were some
    questions back to the EM TC:
    
    1. What is the Area of Interest for the demonstration?
    2. What payload format should the geometry be returned in? (The OGC member
    recommendation is that the geometry response should be GML)
    3. What level of FIPs code (i.e., what type of administrative boundary)?
    
    In general the responses were along the line of "If the goal is to retrieve
    GML for a layer based on simple query like a fips code, it's fairly simple
    to generate a
    (WFS) GetFeature with a query filter specifying the parameter by which to
    limit the response". Now, WFS is the OpenGIS Web Feature Service Interface
    specification. GetFeature is the interface to retrieve a feature or set of
    features and their associated geometry. The query filter allows the client
    to specify the query and send it to a WFS. May sound a bit complicated but
    is actually pretty simple. Their are some Open Source WFS implementations.
    
    Anyway, below my signature are the unedited responses from the OGC members.
    Most of their confusion is probably because I did not frame the question
    very well.
    
    Cheers
    
    Carl
    
    =================================================
    
    Carl:
          What is the demonstration territory?  The counties in the
    Baltimore/Washington CMSA, the rest of the counties in MD and the three
    counties in DE are accessible from the WebTIGER prototype application that
    includes WMS and WFS.  See http://aries.geo.census.gov/index.html for
    descriptive project web pages that will lead you to WebTIGER.    You could
    get the detailed county boundaries and attributes from it.   Or if you want
    to roll your own, you can also download the TIGER/GML version 3 files
    WebTIGER is  serving.  Or there are TIGER/GML version 3 files for the 5
    counties around Detroit MI on the CIPI-1.2 portal.  Or see
    http://www.census.gov/geo/www/tiger/index.html for TIGER/Line files of
    several vintages for all the counties in the U.S., or see
    http://www.census.gov/geo/www/cob/index.html for generalized county
    boundary files in ArcInfo Export, ArcView shapefile, and ArcInfo Ungenerate
    (ASCII) formats.
    
          Cheers,
    Paul
    
     Paul.W.Daisey@census.gov     U.S. Census Bureau
    
    
    ========================================================
    Hi Carl,
    
    We have a WFS with counties from BTS, the data contains the state and county
    FIPS code so you can use a standard filter query to retrieve the counties.
    How do they want the boundary information returned? Portrayed? GML2 or 3?
    Zipped up shape file? SVG? These are all available.
    
    I'm still tuning memory on the server, big requests blow out the stack, but
    if they only returning on county feature per request, then it shouldn't be a
    problem.
    
    Capabilities:
    http://www.redspider.us/ionicweb/wfs/NTAD2002?version=1.0.0&request=GetCapab
    ilities&service=WFS
    
    DescribeFeature:
    http://www.redspider.us/ionicweb/wfs/NTAD2002?version=1.0.0&request=Describe
    FeatureType&service=WFS&typename=BTS_COUNTY
    
    
    I just wanted to show you that I actually do something productive in
    addition harassing people on mailing lists.
    
    Regards,
    
    sonny
    IONIC Enterprises
    
    ==================================================================
    Carl:
    
    I believe we can accommodate OASIS using GIS Portal and GeoSecurity.  We
    would be interested in learning more.
    
    Could you have someone contact me with further information?
    
    Jim
    James A. Aylward
    Executive Vice President
    Harvard Design & Mapping (HDM)
    
    1601 N. Kent St., Suite 1102
    Arlington, VA  22209
    T: 703-224-1414 x211
    F: 703-224-1818
    
    New Cambridge Office Address -
    Effective August 1, 2003:
    125 CambridgePark Drive, 3rd Floor
    Cambridge, MA  02140
    T: 617-354-0100 x211
    F: 617-868-6855
    
    C: 617-233-8424
    W: http://www.hdm.com
    SMS: 6172338424@messaging.sprintpcs.com
    
    
    =================================================
    I have FIPS code via TIGER Census data
    (and some other sources) with WFS
    access. I also have an alert/notification implementation
    (via old OCG sensors spec).
    
    Also reviewed the draft OASIS CAP last week.
    
    Could you be more specific on what/which FIPS code?
    
    Also, I do not have the HTTP CAP Request format (protocol). I should be able
    to produce a CAP
    document with polygons via query, but I currently
    do not have county boundaries, have Congressional dist, municipal bdy,
    county subdivision, urban area in WFS/GML.
    Current query is by bounding box, not FIPS.
    
    Rick Tynes     703-428-6838   ext 2232
    Tynes, Richard D ERDC-TEC-VA <Richard.D.Tynes@erdc.usace.army.mil>
    
    
    
    
    
    


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