map gps coordinates with CGI/ (java or Perl)

Wed Aug 2 00:42:31 PDT 2006

I send you an example :

LAYER
  NAME "mylayer"
  TYPE POINT
  STATUS on
  LABELITEM "id"
  CLASS
LABEL
        TYPE TRUETYPE
        FONT "arial"
        SIZE 20
        POSITION CC
        ANGLE AUTO
        COLOR 0 0 0
        OUTLINECOLOR 255 255 254
        ANTIALIAS TRUE
	END
    NAME "point"
   STYLE
    SYMBOL  "circle"
    SIZE 4
    COLOR 255 0 0
    OUTLINECOLOR 0 0 0
   END
  END

  DATA "mylayer"
  CONNECTION "prova.ovf"
  CONNECTIONTYPE OGR
METADATA
   "wms_title"         "mylayer"
END

END

Prova.ovf is :

<OGRVRTDataSource>
        <OGRVRTLayer name="mylayer">
        <SrcDataSource>ODBC:user/pass at DSN</SrcDataSource>
        <SrcLayer>tablename</SrcLayer
        <GeometryType>wkbPoint</GeometryType>
        <LayerSRS>WGS84</LayerSRS>
        <GeometryField encoding="PointFromColumns" x="x" y="y"/>
        </OGRVRTLayer>
</OGRVRTDataSource>

Bye

********************************************************************************************

 Eng. Fabio D'Ovidio
 WebGIS Staff
 Planetek Italia Srl
 via Massaua, 12 - 70123 Bari - Italy
 web : http ://www.planetek.it
 e-mail : dovidio at planetek.it

********************************************************************************************

On 31 Jul 2006 at 13:41, P Kishor wrote:

> ya then...
> 
> On 7/31/06, Joel Thompson <joel at rhinosystemsinc.com> wrote:
> > Thanks for the feedback. I really appreciate it alot.
> >
> > By dynamically I meant that the CGI would some be given the
> > coordinates at runtime - either read from db, or passed as PARAMETERS
> > in CGI ... and so actually I don't need help in setting up that part.
> 
> so, it is not dynamic in as I thought of dynamic -- as in, a moving
> dot on the screen. The above is plain, vanilla MapServer, so you are
> set there.
> 
> > What I would like to know is what is the best approach for dealing
> > with the list of Long/Lats???
> >
> > 1) Is it to create a MAP file w/ layers and features? OR
> > 2) create a SHAPE file? OR
> > 3) Is this kind of behavior already built into the MAP or MapServer
> > some how?
> > 4) Are their tools that help with this sort of stuff? Like GRASS or
> > something else?
> 
> Well, MapServer will need a .map file with layer definitions. There is
> no way around that. That is the direction that MapServer needs. That
> said, within the .map file, you can define the layer as a shapefile
> (in which case, you will need to create a shapefile), or you might
> even be able to define it as an OGR datasource (although, once again,
> I am skating on thin-ice here... truth be told, I have been doing more
> data-munging lately instead of actually working with MapServer).
> 
> Whether you have to convert your lon/lat into a shapefile or define it
> as an OGR datasource, FW's eponymous tools will help you greatly. You
> can use ogr2ogr to convert lon/lat into shapefile, for which, you will
> have to set up a .ovf file anyway (c'est compliqué, non?). Search for
> ogr2ogr and FW_tools on the MapServer website.
> 
> > 5) Also - I am having problems setting up the Perl MapScript env -
> > I can't get/find any directions on how to integrate the Perl modules into
> > MapServer - Yet Perl works from Apache as a plain-old-cgi env.
> > So I am wondering if I should attempt #1, or #2 in this CGI w/o the
> > perl map module? or should I keep attempting to get the Perl Module
> > integrated... (seemed straight forward, but not quite since I download
> > prebuilt MapServer for Windows 2k and can't rebuild to integrated
> > PERL...sigh..)
> 
> This is the main reason I have not been using MapServer lately. Afaik,
> Perl/MapScript does not work on Windows, and I am, in my current phase
> in life, stuck with Windows for some time. Other flavors of MapScript
> apparently work on Windows, but I have little interest in those
> languages.
> 
> If anyone has been able to build Perl/MapScript on Windows
> successfully, please share the knowledge. (Steve Lime, le père de
> MapServer, might be able to confirm this; then maybe not).
> 
> 
> 
> > P Kishor wrote:
> >
> > > Joel,
> > >
> > > I don't have a specific suggestion for you, but I offer the following
> > > to think about... You asked --
> > >
> > >> > I'd like to map GPS lat/long coordinates dynamically through CGI
> > >
> > >
> > > First, what does "dynamically" mean?
> > >
> > > You will have to somehow transfer the lon/lat from the GPS to the
> > > computer that hosts MapServer. So, that is your first task.
> > >
> > > Then you will have to convert the lon/lat into x,y point features that
> > > MapServer can read. That is your second task.
> > >
> > > Then you will have to create an web app that refreshes every few
> > > seconds in order to be qualified as "dynamically." That is your final
> > > task.
> > >
> > > Your best bet might be to send the GPS stream into a PostGIS database,
> > > and set up a MapServer map file that reads that data source. Write an
> > > Ajax-y app that refreshes the map without touching the rest of the
> > > cruft, and you have a dynamic app.
> > >
> > > When you get it all hooked up and working, I would love to see it and
> > > happily plagiarize it ;-). Better yet, you can write up a nice how-to,
> > > and attach your app for the rest of us to benefit.
> > >
> > > Seriously, search the list archives. If I recall correctly, this kind
> > > of stuff has been asked, and done before.
> > >
> > > On 7/28/06, Joel Thompson <joel at rhinosystemsinc.com> wrote:
> > >
> > >> Hi Guys - sorry to bug you again, but can someone give me some general
> > >> direction?
> > >>
> > >> 1) should I try to manipulate the map file directly through the CGI env?
> > >> If so, what would a sample map file look like to that showed, say Cities
> > >> and the lat/lon coordinates that I provide to show a route...?
> > >>
> > >> 2) Or do I have to use CGI (perl, php...etc.) w/ its API into the
> > >> MapScript to execute this some how? Not sure at all how to do this, so a
> > >> simple sample would be very helpful.
> > >>
> > >> 3) or is there some other CGI type tools that does this for me already?
> > >> IE. Just pass in a list of lat/lon pairs and it would map it out for me?
> > >>
> > >>
> > >> Thanks for you help... I really appreciate it,
> > >> Joel
> > >>
> > >> Joel Thompson wrote:
> > >>
> > >> >
> > >> > Hello,
> > >> >
> > >> > I'd like to map GPS lat/long coordinates dynamically through CGI
> > >> > (preferred JAVA,perl, php, in that order) - I am new to MapServer...
> > >> > Can you help me to get in the right direction with this? is there any
> > >> > add-on tools that do this? or is is just done through the .map w/ html
> > >> > template architecture... where the CGI is used to create the HTML
> > >> file???
> > >> > Any samples would be nice... Thanks in advanced.
> > >> >
> > >> > -Joel
> > >>
> > >
> > >
> >
> >
> >
> 
> 
> -- 
> Puneet Kishor http://punkish.eidesis.org/
> Nelson Inst. for Env. Studies, UW-Madison http://www.ies.wisc.edu/
> Open Source Geospatial Foundation https://edu.osgeo.org/

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