PROJ4, PHP and projection of a single point
Assefa Yewondwossen
assefa at dmsolutions.ca
Fri Feb 23 15:50:37 EST 2001
Hi There,
I have posted on our site the dll for the php/proj module. It was compiled
using php4.0.3. Please give it a try and let me know how it goes.
http://www2.dmsolutions.ca/mapserver/dl/php4.0.3_php_proj_dll.zip
Later,
Stein Runar Bergheim wrote:
> Im after a PHP4.0.4 version - and I should probably have supplied as much
> when I answered your last message!
>
> ----- Original Message -----
> From: "Assefa Yewondwossen" <assefa at dmsolutions.ca>
> To: "Stein Runar Bergheim" <runarbe at online.no>
> Sent: Friday, February 23, 2001 4:00 PM
> Subject: Re: PROJ4, PHP and projection of a single point
>
> > Hi,
> >
> > I never tried to compile it with other compilers except Microsoft VC++ so
> I can
> > not say much about the other compilers.
> >
> > I forgot yesterday to ask you the version of PHP your are using. I
> already have a
> > php3 version of the dll, but I could also provide the php4 version. Please
> let me
> > know.
> >
> > Best Regards,
> >
> > Stein Runar Bergheim wrote:
> >
> > > Thanks a lot - if I had bothered to look in the sources I might even
> > > eventually have found it, but hey - as long as there are enough of you
> that
> > > are actually supplied with your very own brains I won't have to use my
> own...
> > > :-)
> > >
> > > However, I am on the following plattform:
> > > WindowsNT 4.0
> > >
> > > Q: Could the php_proj_module be compiled with the djgpp C/CPP
> libraries???
> > >
> > > Best regards
> > > SRB
> > >
> > > >===== Original Message From Assefa Yewondwossen <assefa at dmsolutions.ca>
> =====
> > > >Hi There,
> > > >
> > > > I am assuming here that you use php/mapscript.
> > > >
> > > > There is a php/proj module available in the mapserver distribution
> > > (.../mapserver/mapscript/php3/php_proj.c). This module give access to
> basic
> > > Proj4 fonctionalities. So in
> > > >your case you colud use the functions to convert the Georeferenced
> > > coordinated to Lat/Long coordinates.
> > > >
> > > >Are you building mapserver/mapscrtipt yourself or do you download the
> binary
> > > versions ? Which platform are you on ? I am asking this so I could post
> the
> > > binary versions on our
> > > >download site.
> > > >
> > > >Later,
> > > >
> > > >
> > > >PS :
> > > >
> > > >Here is a little bit of docs on how to use it :
> > > >
> > > > /*
> > > > * PHP PROJ4 Module
> > > > *
> > > > * This is a PHP module that gives acces to basic PROJ4 projection
> > > > * functionalities.
> > > > *
> > > > * There are four functions available in this module :
> > > > *
> > > > * 1) pj_init : create and initializes a projection structures
> > > > *
> > > > * PJ pj_init(array_of_parameters)
> > > > *
> > > > * Example : $projarray[0] = "proj=lcc";
> > > > * $projarray[1] = "ellps=GRS80";
> > > > * $projarray[2] = "lat_0=49";
> > > > * $projarray[3] = "lon_0=-95";
> > > > * $projarray[4] = "lat_1=49";
> > > > * $projarray[5] = "lat_2=77";
> > > > *
> > > > * $pj = pj_init($projarray);
> > > > *
> > > > * 2) pj_fwd : Performs a projection from lat/long coordinates to
> > > > * cartesian coordinates.
> > > > *
> > > > * retrun_array pj_fwd(double lat, double long, PJ pj)
> > > > *
> > > > * Example : $lat = 45.25;
> > > > * $long = -75.42;
> > > > *
> > > > * $ret = pj_fwd($ingeox, $ingeoy, $pj);
> > > > * printf("geo x = %f<br>\n", $ret["u"]);
> > > > * printf("geo y = %f<br>\n",$ret["v"]);
> > > > *
> > > > * 3) pj_inv : Performs a projection from cartesian coordinates to
> > > > * lat/long coordinates .
> > > > *
> > > > * retrun_array pj_fwd(double geox, double geoy, PJ pj)
> > > > *
> > > > * Example : $ingeox = 1537490.335842;
> > > > * $ingeoy = -181633.471555;
> > > > *
> > > > * $ret = pj_inv($ingeox, $ingeoy, $pj);
> > > > * printf("lat = %f<br>\n", $ret["u"]);
> > > > * printf("lon = %f<br>\n",$ret["v"]);
> > > > *
> > > > * 4) pj_free : frees PJ structure
> > > > *
> > > > * void pj_free(PJ pj);
> > > > *
> > > >
> **********************************************************************/
> > > >
> > > >
> > > >Stephen Lime wrote:
> > > >
> > > >> The solution with MapScript and scripting languages is to use the
> proj4
> > > modules written first by
> > > >> be and a better version was recently posted to the mailing list.
> Perhaps
> > > the folks at DMSolutions
> > > >> could dicuss how to create a php/proj module.
> > > >>
> > > >> Steve
> > > >>
> > > >> Stephen Lime
> > > >> Internet Applications Analyst
> > > >>
> > > >> Minnesota DNR
> > > >> 500 Lafayette Road
> > > >> St. Paul, MN 55155
> > > >> 651-297-2937
> > > >>
> > > >> >>> "Stein Runar Bergheim" <runar at bergheim.dk> 02/22/01 03:05AM >>>
> > > >> I am retreiving a set of points from a database, and am drawing them
> onto
> > > the image object of a map via a layer that is projected from lat/long to
> WGS84
> > > coordinates.
> > > >>
> > > >> This is easy going, my problem occurs when I want to collect a pair
> of
> > > coordinates from the map, perform an inverse projection of them and use
> them
> > > to query the database...
> > > >>
> > > >> Is this possible or should I try some alternate approach...
> > > >>
> > > >> Regards
> > > >> SRB
> > > >
> > > >--
> > > >----------------------------------------------------------------
> > > >Assefa Yewondwossen
> > > >Software Analyst
> > > >
> > > >Email: assefa at dmsolutions.ca
> > > >http://www.dmsolutions.ca/
> > > >
> > > >Phone: (613) 565-5056
> > > >----------------------------------------------------------------
> > >
> > > ****************************************************
> > > Sogn og Fjordane County Municipality
> > > Regionaldevelopment Department
> > > Phone: (+ 0047) 57 65 62 57
> > > E-mail: runar at bergheim.dk
> > > Home: http://www.sf-f.kommune.no
> > > ****************************************************
> >
> > --
> > ----------------------------------------------------------------
> > Assefa Yewondwossen
> > Software Analyst
> >
> > Email: assefa at dmsolutions.ca
> > http://www.dmsolutions.ca/
> >
> > Phone: (613) 565-5056
> > ----------------------------------------------------------------
> >
> >
> >
--
----------------------------------------------------------------
Assefa Yewondwossen
Software Analyst
Email: assefa at dmsolutions.ca
http://www.dmsolutions.ca/
Phone: (613) 565-5056
----------------------------------------------------------------
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