wiki:PHPMapScriptAddPointScale

Version 1 (modified by mdev, 14 years ago) ( diff )

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Add a dynamic point to a layer with min/maxscaledenom

This shows you how to add a point like a city to your mapscript and to use min/max scaledenom to make the feature appear or disappear depending on your scale. 

<?php

// example written by mdev and special thanks to ue and others on #mapserver that helped me resolve the issues


ini_set("display_errors", 1); // show errors for debug

//dl('php_mapscript.so'); // if you need to load mapscript.so

$map_path="../mapfiles/"; // set these to your path
$map = ms_newMapObj("../mapfiles/mapsimple.map"); // set to your mapfile

// city layer

$layer = ms_newLayerObj($map);
$layer->set("status", MS_ON);
$layer->set("type", MS_LAYER_POINT);

$layer->set("minscaledenom", 70); // <------ Shows up if denom<71 and doesn't show if denom>=71
// you can change min to max or add another if you want for the other way around


// add new class to new layer
$class = ms_newClassObj($layer);

$class->label->set("font", "arial-bold");
$class->label->color->setRGB(0, 222, 31);
$class->label->set("size", 10);
$class->label->set("type", MS_TRUETYPE);
$class->label->set("position", MS_CR);
$class->label->set("antialias", TRUE);


$style = ms_newStyleObj($class);
$style->color->setRGB(0, 0, 0);
$style->set("size", 8);
$style->set("symbol", 1);
$style->set("antialias", TRUE);

$point = ms_newPointObj();
$point->setXY(-0.12, 51.50);

$line = ms_newLineObj();
$line->add($point);

$pointShape = ms_newShapeObj(MS_SHAPE_POINT);
$pointShape->add($line);
$pointShape->set("text", "London");

$layer->addFeature($pointShape);
$image=$map->draw();


echo $map->scaledenom . '<br>'; // to check what your denom is
$map->drawLabelCache($image);
//$map->save("/tmp/test2.map"); // if you want to save mapfile to see your output
$image_url=$image->saveWebImage();


?>

<HTML>
 <HEAD>
     <TITLE>Example 1: Displaying a map</TITLE>
 </HEAD>
 <BODY>
     <IMG SRC=<?php echo $image_url; ?> >
 </BODY>
</HTML>
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