Converting string of coordinates to lat long array for google maps api v3 returning longitude as 0

Question

I've taken a look at all the other questions but basically, I have a long list of coordinates as a string that looks like this: "42.2723998, -81.23239 ... 42.84099, -81.3990398" which I have use javascript .split(" , "); on so that its now an array called coordinate[] of strings each holding one coordinate and then using the below code:

// create a coordinate Array
    var polygonCoords = [];
    // creates a new LatLng
    var j = 0;
    var z = j + 1;
while (z < coordinate.length) {
    if ((j%2) === 0) {
    var co1 = parseFloat(coordinate[z]);
    //document.write(coordinate[j]);
    var co2 = parseFloat(coordinate[j]);
    //document.write(co2);
    var newLatLng = new google.maps.LatLng(co1,co2);

    polygonCoords.push(newLatLng);
} else {
    var co2 = parseFloat(coordinate[z]);
    var co1 = parseFloat(coordinate[j]);
    var newLatLng = new google.maps.LatLng(co1,co2);
    polygonCoords.push(newLatLng);
}
    z++;
    j++;
    }

but when I print out the polygonCoords array, it always returns the longitude as 0 and I've also parsed it from a string as well using parseFloat(). Also when I explicitly return the longitude by its own, it returns the actual number. I just need it to work so that I can create an array of LatLngs that I can later use as a path for a polygon.

Why such a convoluted way of going through the coordinates? Could you please provide a complete example array? Why are you spliting on " ' "? Doesn't look like that character is in the example string you provided. — geocodezip
– geocodezip, Commented Jun 10, 2015 at 15:45
Oops, sorry, meant to write the comma (",") for split, sorry, wrote this question too fast — mding5692
– mding5692, Commented Jun 10, 2015 at 15:47
Basically what I'm working on is creating an array of polygons and then attaching a customized infowindow to each one where the information for the infowindow should be stored in a kml file, however, I cannot change the kml file so I'm using javascript to basically do the job — mding5692
– mding5692, Commented Jun 10, 2015 at 15:50
What do you mean you "cannot change the kml file"? Why are you re-inventing the wheel? There are third party KML parsers that will parse KML for you and create native google maps javascript API v3 polygons (geoxml3, geoxml-v3). — geocodezip
– geocodezip, Commented Jun 10, 2015 at 15:59
Here is the original string : -81.2338973051004,42.9872488004691,0 -81.2337121944366,42.9872547337441,0 -81.233528492502,42.9872724884156,0 -81.233347597307,42.9873019293669,0 ... (its too long to put in one comment and i keep getting (42.9872488004691, -81.23389730510041),(42.9872488004691, 0),(42.9872547337441, 0),(42.9872547337441, 0),(42.9872724884156, 0),(42.9872724884156, 0),(42.9873019293669, 0),(42.9873019293669, 0),(42.9873428325462, 0),(42.9873428325462, 0)... also just the kml file holds many different polygons which is why I also need to separate those out — mding5692
– mding5692, Commented Jun 10, 2015 at 16:02

mding5692 · Accepted Answer · 2015-06-10 20:09:34Z

1

Ok, I've fixed it, somehow when I grabbed the longitude from the kml file, it would be in the form of 0 -81.290390... and so whenever i parsed it into float, it would recognize it as 0 instead of -81.293848. Now its done properly, and printing out the correct floats.

answered Jun 10, 2015 at 20:09

mding5692

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