private function AppendLayer($layer, $extent, $drawOrder, $format, $sessionId, $writer)
{
$baseUrl = $this->app->config("SelfUrl");
$layerKml = "<NetworkLink>";
$layerKml .= "<visibility>";
$layerKml .= $layer->GetVisible() ? "1" : "0";
$layerKml .= "</visibility>";
$layerKml .= "<name><![CDATA[";
$layerKml .= $layer->GetLegendLabel();
$layerKml .= "]]></name>";
$layerKml .= "<Link>";
$layerKml .= "<href>";
//TODO: If we can reverse-route we should.
$ldfId = $layer->GetLayerDefinition();
$url = MgUtils::TranscodeResourceUrl($baseUrl, $ldfId) . "/" . strtolower($format) . "?draworder=" . $drawOrder . "&session=" . $sessionId;
$layerKml .= $url;
$layerKml .= "</href>";
$layerKml .= "<viewRefreshMode>onStop</viewRefreshMode>";
$layerKml .= "<viewRefreshTime>1</viewRefreshTime>";
$layerKml .= "<viewFormat>bbox=[bboxWest],[bboxSouth],[bboxEast],[bboxNorth]&width=[horizPixels]&height=[vertPixels]</viewFormat>";
$layerKml .= "</Link>";
$layerKml .= "</NetworkLink>";
$writer->WriteChunk($layerKml);
}
