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Reliability of GeoName IDs  XML
Forum Index -> FAQ - frequently asked questions
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odarriba



Joined: 30/08/2024 18:07:56
Messages: 1
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Hello,

I wanted to ask how reliable is a geonameID returned by the API or obtained from a dump.

Do they change?
Is it possible, for example, that an ADM2 entry can change ID if any of its data changes?

I usually work with GeoNames data (which is great!) but I'm starting to move to hosted information rather than smashing the API to get the latest information.

I mainly use ADM1, ADM2 and cities names, so that rarely changes, but if I search by coordinates or text using the API I would like the IDs to match the local ones I fetched during seeding phase.

Thanks
marc



Joined: 08/12/2005 07:39:47
Messages: 4439
Offline

the geonameid is a permanentid for a feature. It will never change.
If adm2 are merged or split new adm2 may be generated, depending on the extend of the change. If two adm2 merge and the merged adm2 has a different name and national code a new feature will be created. The others will be ADM2H.

Best Regards

Marc

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