[Mapserver-users] mapscript: convert lat/lon to map coords? Simple Q

[poff]

Hello all,

This is a simple question which is puzzling me.

When I draw a lat/lon value on a map, I just call setXY() and it draws in 
the right place.

However it seems when I want to draw a line it's using map co-ordinates - 
even if I set an extent.

It's probably something really stupid I'm doing so I hope you can help me 
out!

The mapfile is simple, and the script below does output a line, but not 
with lat/lon co-ords but absolute co-ords for the image.

...
# start layer lines

LAYER
	NAME 'lines'
	TRANSFORM FALSE
	TYPE LINE
	STATUS DEFAULT

	CLASS
		SYMBOL 'marker'
		SIZE 2
		COLOR 255 0 0
	END

END

# end layer lines
...

Oh yes, is there are quicker (or smaller number of lines way) of adding 
lines to a map?

Thank you in advance for any help,

<?php
...
$mapObj = ms_newMapObj($_SERVER["DOCUMENT_ROOT"]."/maps/plot.map");

$layerObj = $mapObj->getLayerByName("lines");
$layerObj->set("status", 1);

$minx=-125;
$miny=10;
$maxx=105;
$maxy=50;

$mapObj->setextent($minx,$miny,
                     $maxx,$maxy);

$imgObj=$mapObj->draw();

$shpObj = ms_newShapeObj(MS_SHAPE_LINE);

$pointObj1 = ms_newPointObj();
$pointObj1->setXY(-122.247,47.5881); // Seattle

$pointObj2 = ms_newPointObj();
$pointObj2->setXY(5.73333,45.65); // Paris

$pointObj3 = ms_newPointObj();
$pointObj3->setXY(104.917,11.55); // Phnom Pehn

$lineObj = ms_newLineObj();

$lineObj->add($pointObj1);
$lineObj->add($pointObj2);
$lineObj->add($pointObj3);

$shpObj->add($lineObj);

$shpObj->draw($mapObj, $layerObj, $imgObj, 0, "foo");

$image_url=$imgObj->saveWebImage(MS_PNG,1,1,0);
...
?>

Any other criticisms are warmly welcomed!
-- 
poff at sixbit.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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