Example of drawing a red/green/blue triangle around a given map coordinate

PageWithMap.php

 /*
  Render a triangle around the provided lat,lon, zoom from the editing functions,
  */
  public function MapWithLines() {
    $map = $this->owner->getRenderableMap();
    $map->setZoom( $this->ZoomLevel );
    $map->setAdditionalCSSClasses( 'fullWidthMap' );
    $map->setShowInlineMapDivStyle( true );

    $scale = 0.3;

    // draw a triangle
    $point1 = array(
      $this->Lat - 0.5*$scale, $this->Lon
    );
    $point2 = array(
      $this->Lat + 0.5*$scale, $this->Lon-0.7*$scale
    );

    $point3 = array(
      $this->Lat + 0.5*$scale, $this->Lon+0.7*$scale
    );

    $map->addLine( $point1, $point2 );
    $map->addLine( $point2, $point3, '#000077' );
    $map->addLine( $point3, $point1, '#007700' );

    return $map;
  }