[Mapserver-users] Mapscript: Display points on the fly

[Bjoern Platzen]

Hi Lowell,

sorry, that I didn't mention...

I'm coding Python based on the Perl-Examples.

I never coded Perl (just Python, PHP, VB), so it is a kind of hard for 
me to understand what all that perl stuff means...

But I could solve my problem meanwhile.

Thanks,

Bjoern.

Am Mittwoch, 9. Juli 2003 17:01 schrieb Lowell Filak:
> I'm not following the code syntax.
> Are you saying you are trying to code PerlMapScript or trying to code
> something different based on PerlMapScript examples?
> Lowell
>
> The following message was sent by Bjoern Platzen
> <bplatzen at sosnetz.de> on Wed, 9 Jul 2003 16:01:45 +0200.
>
> > Hi,
> >
> > I'm trying to display a point at the last klickpoint in the map,
> > but it doesn't appear on the map. I know that this has been
> > discussed on the list a few times, but all the Examples I found
> > were in Perl and I'm not really a Perl-programmer...
> >
> > First of all, the mapObj (self.mymap) is defined and the image is
> > prepared with
> >
> > self.myimage=self.mymap.prepareImage()
> >
> > My function to draw the point looks like that:
> >
> > def _drawPoint(self, point):
> >
> >     pLayer = self.mymap.getLayerByName('onthefly')
> >     pLayer.status = mapscript.MS_ON
> >     newPoint = mapscript.pointObj()
> >     newPoint.x, newPoint.x = point[0], point[1]
> >     newPoint.draw(self.mymap, pLayer, self.myimage, 0, 'Klick')
> >     self.layers.append('onthefly')
> >
> > point is a tuple of the map-coordinates (eg. (2548085.3064984209,
> > 5674031.5200534584).
> >
> > After _drawPoint, the function _drawLayers is called:
> >
> > def _drawLayers(self):
> >     for l in self.layers:
> >         ll = self.mymap.getLayerByName(l)
> >         str(ll)
> >         ll.draw(self.mymap, self.myimage)
> >
> > self.layers contains the layer-names
> >
> > After that, the image is saved with
> >
> > def makemap(self):
> >     self.mymap.drawLabelCache(self.myimage)
> >     out =
> > self.myimage.saveImage(self.imgpath+self.outname,mapscript.MS_PNG,0
> >,0,50) self.mapimg = self.imgpath+self.outname
> >
> > In my mapfile, Ive got a layer 'onthefly':
> >
> > LAYER
> >   NAME 'onthefly'
> >   TYPE POINT
> >   STATUS OFF
> >   CLASS
> >     Symbol 'phk'#Image-Symbol
> >   END
> > END
> >
> > What am I missing?
> >
> > Bye, Bjoern
> > --
> > small office solutions
> > info at sosnetz.de  -  http://www.sosnetz.de
> >
> > _______________________________________________
> > Mapserver-users mailing list
> > Mapserver-users at lists.gis.umn.edu
> > http://lists.gis.umn.edu/mailman/listinfo/mapserver-users

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