Hi Benjamin,
As is the case throughout the API, you must specify the xsi:type attribute
on an element that can be one of many different types. In this case, the
element should have the attribute
xsi:type="namesp2:Location" on it.
Best,
- Eric Koleda, AdWords API Team
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I am attempting to extract a series of traffic estimations for
keywords, using the same location filter I could use on the traffic
estimator service page. (location: US) with the new 201109 API release
(
http://code.google.com/apis/adwords/docs/reference/v201109/TrafficEstimatorService.CampaignEst