A WOEID (Where on Earth IDentifier) is a unique 32 bit reference identifier assigned by Yahoo! to identify any feature on Earth. In simple terms, the number points a location in the world, for Example WOEID for Jakarta is 1047378, Bandung is 1047180 and Surabaya is 1044316. Every place in the world has it's own WOEID.
WOEID mainly used on Yahoo Weather, however by the time goes, many people use it on their applications. Twitter for example, they use WOEID on their Trending Topics result, since each location on earth had different Topics to discuss.
I'm not an expert on geospatial things or other related to WOEID, just working on small twitter application that turned out needs WOEID when fetching Trending Topics.
So, If you need WOEID, here is the place to look for it:
1. WOEID for worldwide is always "1"
2. You can visit http://woeid.rosselliot.co.nz
3. You can also extract the WOEID in the URL after searching for a city on Yahoo Weather.
Hope this helps someone :)
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