I am trying to load some external GML map data into an SVG document - and it is
working
99% fine.
1. It works perfectly in Firefox
2. It works in ASV - but I get intermittent error messages ('Object required')
when calling
the function sometimes. On some occasions, It'll load the same GML data just
fine.
It seems that, at some stage during the loop for svg polygon creation, ASV
can't read the
GML elements which have been loaded into the 'xmlobjects' <g> element.
My code is below - anyone had anything similar happen? or any ideas why ASV is
behaving
so erratically?
function addGeom(node) {
clearXMLCache();//function to clear temporary area for GML loaded
svgDoc.getElementById('xmlobjects'.appendChild(node)//puts new GML content in
temporary area
clearMapCache();//function clears out previous map geometry for the SVG
pathBuilder();//function to convert GML data into SVG syntax
}
//MAIN function
function pathBuilder() {
var myData = svgDoc.getElementById('xmlobjects');
var TargetLayer = svgDoc.getElementById('gmlcontent');
var aID = new Array();
var aPaths = new Array();
var myTile =
myData.getElementsByTagNameNS(gmlNS,"featureMember");
var myBBox = myData.getElementsByTagNameNS(gmlNS,"Box").item(0);
var myBBoxData = myBBox.getElementsByTagNameNS
(gmlNS,"coordinates").item(0).firstChild.data;
var a = myBBoxData.split(",");
var b = a[1].split(" ");
var newX = a[0];
var newWidth=b[1]-a[0];
var newHeight=a[2]-b[0];
var tempy = parseInt(b[0])+parseInt(newHeight);
var newY = 1100000-tempy;
var newViewbox = newX+' '+newY+' '+newWidth+' '+newHeight;
svgDoc.getElementById('mapwindow').setAttributeNS
(null,'viewBox',newViewbox);
nFeatures = myTile.length;//number of objects in the map data
for (i=0;i<nFeatures;i++) {
var myFeature = myTile.item(i);
var myPathData = 'M';//starts a path element for a map
feature
var myCode = myFeature.getElementsByTagNameNS("http://
www.esri.com/WFS",'RESIDENCE').item(0).firstChild.data;
var myPolygons = myFeature.getElementsByTagNameNS
(gmlNS,'coordinates');
//inner loop to deal with multi-polygons and
donuts - adds a
'moveto' command
for (j=0;j<myPolygons.length;j++) {
var myCoords =
myPolygons.item(j).textContent;
if (myCoords ==null) {
myCoords =
myPolygons.item(j).firstChild.data;
} //End of if
if (j>0) {
myPathData = myPathData+'
M'+myCoords;
} else {
myPathData =
myPathData+myCoords;
} //end of if
} //End of inner for loop
//close path and update path array
myPathData = myPathData+'Z';
aID[i] = myCode;
aPaths[i] = myPathData;
} //end of outer for loop
var newGroup =
svgDoc.createElementNS('http://www.w3.org/2000/svg',"g");
newGroup.setAttributeNS(null,'id','polygongroup');
TargetLayer.appendChild(newGroup);
var PathTargetLayer = svgDoc.getElementById('polygongroup');
for (k=0;k<nFeatures;k++) {
//CREATE PATH ELEMENT AND APPEND TO DOCUMENT
var newPath =
svgDoc.createElementNS('http://www.w3.org/2000/
svg',"path");
newPath.setAttributeNS(null,'d',aPaths[k]);
newPath.setAttributeNS(null,'id','GML_'+aID[k]);
PathTargetLayer.appendChild(newPath);
} //End of for loop
} //End of function
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