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, Jul 19 '16 at 14:12

score 0 · Answer 1 · answered Jul 19 '16 at 13:50

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 '16 at 13:50

Max Uppenkamp

974
4
16

I tried this but I think the namespacing is a problem. I've update above to show what I've got so far. – sammy88888888 Jul 19 '16 at 14:06
http://stackoverflow.com/a/8181480/2102710 Try that, it's a workaround for namespacing... – Max Uppenkamp Jul 19 '16 at 14:08

Get xml value based on another value in javascript

1 Answers1