[Mapserver-users] can I use different symbols in thesamedynamic layer?

[Eric Bridger]

I wasn't very clear.  Not a new class, a new class instance. Or, for
MS4.0, a new style instance. So your layer would have 1 class and 1
sytle. For each point you want to draw, in psuedo code:
$layer = getLayerByName()
$point = new pointObj(); # the point can be re-used.
foreach lat, lon {
   $class = $layer->getClass(0);
   $style = $class->getSytle(0);
   # set your style attributes, symbol, color, etc.
   ....
   $point->draw();
}

On Wed, 2003-09-24 at 15:02, Frieso ter Haseborg wrote:
> Hi,
> 
> okay: new color, new class - sounds good, I think. But - here comes
> another newbie-question - how do I tell the points to which class they
> belong???
> 
> Doesn't this lead back to the CLASSITEM/EXPRESSION-question or am I
> missing something?
> 
> TIA,
> Frieso
> 
> 
> >-----Original Message-----
> >From: Eric Bridger [mailto:eric at gomoos.org]
> >Sent: Wednesday, September 24, 2003 12:02 PM
> >To: Frieso ter Haseborg
> >Cc: Mapserver List
> >Subject: RE: [Mapserver-users] can I use different symbols in
> >thesamedynamic layer?
> >
> >
> >You're right Frieso,
> >I am still using 3.6
> >
> >The issue you mention below exists in 3.6 as well.  What you need to do
> >is to get a new class for each point and set the color and symbol anew.
> >
> >On Wed, 2003-09-24 at 09:27, Frieso ter Haseborg wrote:
> >> Hi,
> >> 
> >> one more question: Can't I change the color the same way? After
> >> successfully using different symbols, I tried to change the 
> >color of the
> >> symbols also. But a color-change only takes effect for the 
> >first change
> >> resp. for the first symbol drawn. All subsequent symbols are drawn in
> >> _this_ new color also, but not in the individual color specified for
> >> each symbol.
> >> 
> >> My PHP/MapScript goes like this:
> >> $sym1 = $map->getSymbolByName ( "excl" );
> >> $sym2 = $map->getSymbolByName ( "tent" );
> >> $class = $layer->getClass (0);
> >> $style = $class->getStyle(0);
> >> 
> >> // first point
> >> $style->color->setRGB(0, 0, 255); // now the next point will 
> >change to
> >> blue 
> >> 					    // (symbols in mapfile are
> >> initialized in red)
> >> 					    // THIS CHANGE WORKS!
> >> $style->set ( 'symbol', $sym1 );
> >> $pt = ms_newPointObj();
> >> $pt->setXY( 2100000, 10100000 );
> >> $pt->draw($map, $layer, $image, 0, "Pt1");
> >> 
> >> // second point
> >> $style->color->setRGB(0, 255, 0); // now the next point IMO should
> >> become green, but it doesn't, it stays blue
> >> 					    // THIS CHANGE FAILES!
> >> $style->set ( 'symbol', $sym2 );
> >> $pt = ms_newPointObj();
> >> $pt->setXY( 4400000, 10000000 );
> >> $pt->draw($map, $layer, $image, 0, "Pt2");
> >> 
> >> 
> >> Am I overlooking something or is there any restriction I ran into?
> >> 
> >> TIA,
> >>  
> >> Frieso ter Haseborg
> >> - Software Development - 
> >>  
> >> --
> >> 
> >> -------------------------------------------------- 
> >> S&F Datentechnik GmbH&Co.KG 
> >> Reimersstr. 41b 
> >> 26789 Leer, Germany
> >> 
> >> 
> >> 
> >> >-----Original Message-----
> >> >From: Frieso ter Haseborg 
> >> >Sent: Wednesday, September 24, 2003 9:52 AM
> >> >To: Eric Bridger
> >> >Cc: mapserver-users at lists.gis.umn.edu
> >> >Subject: RE: [Mapserver-users] can I use different symbols in the
> >> >samedynamic layer?
> >> >
> >> >
> >> >Hi Eric,
> >> >
> >> >thanx, yes this helped a lot. It works - but so far only, when 
> >> >using the StyleObj-Class.
> >> >
> >> >I did the following in PHP:
> >> >
> >> >$sym1 = $map->getSymbolByName ( "excl" );
> >> >$sym2 = $map->getSymbolByName ( "tent" );
> >> >$class = $layer->getClass (0);
> >> >$style = $class->getStyle(0);
> >> >
> >> >$style->set ( 'symbol', $sym1 );
> >> >[...]//draw point1
> >> >
> >> >$style->set ( 'symbol', $sym2 );
> >> >[...]//draw point2
> >> >
> >> >It looks like the symbol attribute is obsolete in MS and 
> >> >PHP/MapScript version 4.0, though no error is raised. It 
> >> >simply effects nothing in my configuration. Which version 
> >do you use?
> >> >
> >> >Anyway it works, thanx again!
> >> >
> >> >Best regards,
> >> > 
> >> >Frieso ter Haseborg
> >> >- Software Development - 
> >> > 
> >> >--
> >> >
> >> >-------------------------------------------------- 
> >> >S&F Datentechnik GmbH&Co.KG 
> >> >Reimersstr. 41b 
> >> >26789 Leer, Germany
> >> > 
> >> >
> >> >
> >> >
> >> 
> >> _______________________________________________
> >> Mapserver-users mailing list
> >> Mapserver-users at lists.gis.umn.edu
> >> http://lists.gis.umn.edu/mailman/listinfo/mapserver-users
> >> 
> >
> >
> >
> >
> 
>