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I am having trouble removing placemarks. My pickup function picks up the passengers and renders the seating chart correctly, but placemarks from the 3D map are not being removed, thus I can pickup a passenger multiple times. What I am doing in the pickup function is: if the passenger is within range, I update the shuttle.seats[] array, render the seating chart again, and then use the following code to remove the placemark:

var features = earth.getFeatures();
features.removeChild(placemark);   // i've already made the placemark to be global

but placemarks are unaffected and they stay there. What am I doing wrong?

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    Each passenger has a placemark associated with him/her. How are you initializing placemark to the placemark of a passenger? – kzidane Sep 25 '14 at 12:15
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Your removeChild(placemark) won't work, because it calls the wrong property.

If you added the placemark to PASSENGERS[i], you need to access placemark from PASSENGERS[i].placemark, not just placemark.

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