[Mapserver-users] Change Projection (e.g. Geographic to Robinson)

Tue Jul 13 05:55:30 PDT 2004

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This works for me:

=20

  =
$newproj=3Dms_newprojectionObj("proj=3Drobin,lon_0=3D0,x_0=3D0,y_0=3D0");=

=20
$latlon=3Dms_newprojectionObj("proj=3Dlonglat,ellps=3DGRS80,datum=3DNAD83=
,no_def
s");

=20

  $oldext=3D ms_newRectObj();

  $oldext->setextent($bounds[0],$bounds[1],$bounds[2],$bounds[3]);
//this is the extent of my map in geographic

  $oldext->project($latlon,$newproj);  //reproject to Robinson

=20

=20
$map->setextent($oldext->minx,$oldext->miny,$oldext->maxx,$oldext->maxy)
;  //set the new map extent

=20

=20

Hope that helps,

D. Pagurek

=20

=20

-----Original Message-----
From: mapserver-users-admin at lists.gis.umn.edu
[mailto:mapserver-users-admin at lists.gis.umn.edu] On Behalf Of Stefan
Schwarzer
Sent: Monday, July 12, 2004 10:56 AM
To: mapserver-users at lists.gis.umn.edu
Subject: [Mapserver-users] Change Projection (e.g. Geographic to
Robinson)

=20

Hi there,

it seems that either the "change projection on-the-fly" feature isn't
widely used or nobody has problems with it. At least, the number of
threats using the ms_newprojectionObj command is relatively small. And
the WIKI is empty on the subject of "Projections".

Could somebody provide me with a working example? I tried to change the
projection of my data from "geographic" to "robinson" using the
ms_newprojectionObj object, but it didn't work,  and honestly, I am a
bit confused by the different parameters...

Thanks for any help,

Stefan

        _______________________________________

        Stefan Schwarzer
        GIS & Data Management

        UNEP/DEWA/GRID-Geneva
        Chemin des Anemones 11
        CH - 1219 Chatelaine
        Switzerland

        Tel: (+41) 22.917.83.49
        Fax: (+41) 22.917.80.29

        Email: stefan.schwarzer at grid.unep.ch
        Internet: http://geodata.grid.unep.ch/
        _______________________________________=20

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<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>This works for =
me:</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>  =
$newproj=3Dms_newprojectionObj("proj=3Drobin,lon_0=3D0,x_0=3D0,y_0=3D=
0");</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>  =
$latlon=3Dms_newprojectionObj("proj=3Dlonglat,ellps=3DGRS80,datum=3D=
NAD83,no_defs");</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>  $oldext=3D =
ms_newRectObj();</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>  $oldext->setextent($b=
ounds[0],$bounds[1],$bounds[2],$bounds[3]); 
//this is the extent of my map in geographic</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>  =
$oldext->project($latlon,$newproj); 
//reproject to Robinson</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>  =
$map->setextent($oldext->minx,$oldext->miny,$oldext->maxx,$ol=
dext->maxy); 
//set the new map extent</span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'>Hope that helps,</span></font></p>

D. Pagurek

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

<p class=3DMsoNormal><font size=3D2 color=3Dnavy face=3DArial><span =
style=3D'font-size:
10.0pt;font-family:Arial;color:navy'> </span></font></p>

-----Original
Message----- 
From:
mapserver-users-admin at lists.gis.umn.edu
[mailto:mapserver-users-admin at lists.gis.umn.edu] On Behalf Of Stefan Schwarzer 
Sent: Monday,
 July 12, 2004 10:56
 AM 
To: =
mapserver-users at lists.gis.umn.edu 
Subject: =
[Mapserver-users] Change
Projection (e.g. Geographic to Robinson)

<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>

Hi there, 
 
it seems that either the "change projection on-the-fly" =
feature isn't
widely used or nobody has problems with it. At least, the number of =
threats
using the ms_newprojectionObj
command is relatively small. And the WIKI is empty on the subject of
"Projections". 
 
Could somebody provide me with a working example? I tried to change the
projection of my data from "geographic" to =
"robinson" using
the ms_newprojectionObj object, but it didn't work,  and honestly, =
I am a
bit confused by the different parameters... 
 
Thanks for any help, 
 
Stefan

<x-sigsep>

<p style=3D'margin-left:.5in'></x-sigsep><font size=3D3 face=3D"Times =
New Roman"><x-tab><span
style=3D'font-size:12.0pt'>       &nbs=
p;</x-tab>_______________________________________<br>
<br>
</span></font><font size=3D2 face=3DCourier><x-tab><span =
style=3D'font-size:10.0pt;
font-family:Courier'>        <b><=
span
style=3D'font-weight:bold'></x-tab>Stefan Schwarzer<br>
</span></b><x-tab>        </x-tab=
>GIS
& Data Management<br>
<br>
<x-tab>        </x-tab>UNEP/DEWA/=
GRID-Geneva<br>
<x-tab>        </x-tab>Chemin =
des
Anemones 11<br>
<x-tab>        </x-tab>CH - 1219
Chatelaine<br>
<x-tab>        </span></x-tab></f=
ont><font
  size=3D2 face=3DCourier><span =
style=3D'font-size:10.0pt;font-family:Courier'>Switzerland</span></font><=
font
size=3D2 face=3DCourier><span =
style=3D'font-size:10.0pt;font-family:Courier'><br>
<br>
<x-tab>        </x-tab>Tel: =
(+41)
22.917.83.49<br>
<x-tab>        </x-tab>Fax: =
(+41)
22.917.80.29<br>
<br>
<x-tab>        </x-tab>Email:
stefan.schwarzer at grid.unep.ch<br>
<x-tab>        </x-tab>Internet: =
<a
href=3D"http://geodata.grid.unep.ch/" =
eudora=3Dautourl>http://geodata.grid.unep.ch/<br>
</a></span></font><x-tab>        =
</x-tab>_______________________________________
</p>

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