XML to JavaScript Array [Google Maps]

Question

I need create Javascript array from xml ..

I`v get xml data from poly php with ajax. Everything is ok.

I must create array like that:

  point = [
                 new google.maps.LatLng(40.9921196514,47.8604733650 ),
                 new google.maps.LatLng(40.9922511293,47.8606186245 ),

        ];

Code

 downloadUrl("poly.php", function(data) {
        var xml = data.responseXML;
        var polys = xml.documentElement.getElementsByTagName("poly");
        for (var i = 0; i < polys.length; i++) {

             var pid  = polys[i].getAttribute("pid");


   point = [
          new google.maps.LatLng(parseFloat(polys[i].getAttribute("plat")), parseFloat(polys[i].getAttribute("plng")) );
        ];

i`ve do that but it does not work.. ((

P.S. I get data from MySQL.

...

Xml:

    <polys>
<poly pid="1" pstatus="status1" plat="40.992638" plng="47.860474"/>
<poly pid="2" pstatus="status2" plat="40.992252" plng="47.860619"/>
</polys>

please explain "does not work." Are you seeing errors? Strange behavior? What exactly is it doing which is different from what you expect? — Evan Davis
– Evan Davis, Commented Jan 5, 2013 at 19:54
I use Alert(point); dont show me anything. But when use point = [ new google.maps.LatLng(40.9921196514,47.8604733650 ), new google.maps.LatLng(40.9922511293,47.8606186245 ), ]; like that it work — brio
– brio, Commented Jan 5, 2013 at 20:10
Example that parses XML to polylines (the XML is slighly different format from yours). — geocodezip
– geocodezip, Commented Jan 5, 2013 at 21:08

Dr.Molle · Accepted Answer · 2013-01-05 21:07:49Z

1

May I assume you use the function downloadUrl from googles util.js ?

When yes: data is already a document, there is no need to access data.responseXML

Each attempt to access a property of xml will result in an error, because xml is undefined

Replace this:

    var xml = data.responseXML;
    var polys = xml.documentElement.getElementsByTagName("poly");

with:

    var polys = data.documentElement.getElementsByTagName("poly");

There is an syntax-error:

point = [
          new google.maps.LatLng(parseFloat(polys[i].getAttribute("plat")), parseFloat(polys[i].getAttribute("plng")) );
        ];

remove the semicolon:

("plng")) );
//---------^

But to get the desired result you must create the point-array outside the loop:

var point=[];

and add the LatLng's to point inside the loop:

point.push(new google.maps.LatLng(parseFloat(polys[i].getAttribute("plat")),  
                                  parseFloat(polys[i].getAttribute("plng"))));

edited Jan 5, 2013 at 21:07

answered Jan 5, 2013 at 20:42

Dr.Molle

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5 Comments

brio Over a year ago

Thanks for answer. Bu didnt work :(( .. Myjs page like that jsfiddle.net/JFR3n ... [i`d include util.js in main page]

brio Over a year ago

So thanks. I`l do it with xml point.push ..it work)) but interesting problem: (40.992638, 47.86047400000007),(40.992252, 47.86061900000004) it show me this lat long.. but my lat longs like that: (40.992638 47.860474 ) (40.992252 47.860619)..... what is: 00000007 & 00000004 ? where it take this numbers?:((

Dr.Molle Over a year ago

not an solution, but maybe interesting: stackoverflow.com/questions/13307066/…

brio Over a year ago

no its solution.. i dont understand ., what is this numbers?:))

Dr.Molle Over a year ago

it must be the result of an internal calculation by the maps-API

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