Drawing points and lines dynamically

[Camden Daily]

If you turn off all of the other layers, can you see the point then? 
It might be a matter of extents or projections.  Are your extents in
latitude/longitude degrees as well?
 
> One thing that I am confused about is to whether or not the layer that I
> want to create the point
> on has to be already defined in the map file or whether the code below
> actually creates a 'dynamic'
> layer.

It creates a dynamic layer.  You do not need to pre-define the layer
in the .map file.  Althought I've not actually tried it, I believe
that you could make your entire .map file definition through
mapscript.

I'm not sure why else the point might not show up, but I would suggest
looking at the layer->addFeature() function.  I think it's much more
straightforward than drawing the map, and then calling point->draw()
over it.  Just do something like this to add a point to a layer:

function add_point_to_layer($layer, $longitude, $latitude) {
  // create and initialize new point object
  $point = ms_newPointObj();
  $point->setXY($longitude, $latitude);
  // create and initialize new line object
  $line = ms_newLineObj();
  $line->add($point);
  // create and initialize new shape object
  $shape = ms_newShapeObj(MS_SHAPE_POINT);
  $shape->add($line);
  // add our shape
  $layer->addFeature($shape);
}

Then, once you've added the points, just call $image = $map->draw();
and everything should draw nicely.

-Camden
 
> regards
> Simon
> 
> $layer = ms_newLayerObj($map);
> $layer->set("name", "Route");
> $layer->set("type", MS_LAYER_POINT);
> $layer->set("status", MS_DEFAULT);
> $layer->set("transform", TRUE);
> 
> $class = ms_newClassObj($layer);
> $class->label->set("font", "arial");
> $class->label->color->setRGB(255, 0, 0);
> 
> $symbol = $map->getSymbolByName("circle");
> $style = ms_newStyleObj($class);
> $style->set("symbol", $symbol);
> $style->set("size", 8);
> $style->color->setRGB(255, 0, 0);
> 
> $image = $map->draw();
> 
> $point = ms_newPointObj();
> $point->setXY(0.0, 54.0);
> $point->draw($map, $layer, $image, 0, "test");
> $image_url=$image->saveWebImage();
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