PHP/MapScript projection string

[Dirk Jesko]

Hi Robert,

did you try proj.4 syntax? Like

"+proj=tmerc +lat_0=0 +lon_0=27 +k=1 +x_0=3500000 +y_0=0 
+towgs84=-75,-230,-89 +ellps=intl"

This seems to work in my case.

Regards,
Dirk Jesko



Robert Albrecht wrote:

> Hi!
>
> I'm trying to do a conversion from Finnish KKJ coordinates to WGS 84 
> lat/long coordinates using PHP/MapScript. My problem is that I can't 
> figure out how to specify the transformation parameters.
>
> The projection I'm trying to do looks like this:
> $projIn = 
> ms_newProjectionObj("proj=tmerc,lat_0=0,lon_0=27,k=1,x_0=3500000,y_0=0,towgs84=-75,-230,-89,ellps=intl"); 
>
> $projOut = ms_newProjectionObj("proj=latlong,datum=WGS84");
>
> However the "towgs84=-75,-230,-89" part only works for the dx part 
> (-75) as MapScript apparently thinks -230 and -89 are new parameters. 
> I've tried different ways to specify the transformation parameters, 
> without any luck. Could someone help me out here?
>
> Thanks in advance,
> Robert Albrecht
>