Get xml value based on another value in javascript

Question

I have some gml that looks like this:

<gml:featureMember>
    <a:location>ABCD</a:location>
    <a:ElevatedPoint>
        <gml:pos>44.0 1.2</gml:pos>
        <a:elevation uom="FT">23</a:elevation>
    </a:ElevatedPoint>
</gml:featureMember>
<gml:featureMember>
    <a:location>EFJH</a:location>
    <a:ElevatedPoint>
        <gml:pos>33.3 -6.9</gml:pos>
        <a:elevation uom="FT">244</a:elevation>
    </a:ElevatedPoint>
</gml:featureMember>

I want to get the gml:pos based on value of a:location. So for example, I want the position related to location ABCD. I'm guessing using xpath is the way forward but not really sure where to start.

Any help appreciated. Let me know if you need any more information.

UPDATE

This is what I've go so far:

var positions = document.evaluate("/featureMember/location[ABCD]/ElevatedPoint/pos", xml, null, XPathResult.ANY_TYPE, null);

Without namespace problem the Xpath should be /featureMember/location[.="ABCD"]/following-sibling::ElevatedPoint/pos — splash58
– splash58, Commented Jul 19, 2016 at 14:12

Max Uppenkamp · Accepted Answer · 2016-07-19 13:50:29Z

0

Never used Xpath on gml, but this is what i'd do:

/featureMember/location[desired_value]/ElevatedPoint/pos

keep in mind that this is XML xpath syntax and i have no idea how it has to look for GML, and that this will return ALL positions of nodes with the correct location.

answered Jul 19, 2016 at 13:50

Max Uppenkamp

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2 Comments

sammy88888888 Over a year ago

I tried this but I think the namespacing is a problem. I've update above to show what I've got so far.

Max Uppenkamp Over a year ago

stackoverflow.com/a/8181480/2102710 Try that, it's a workaround for namespacing...

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