Hello AD Forums,
I am a member of the ADP and am working on an iOS app for the App Store.
My app needs to match the user’s current location to one of Germany’s 400 district-level administrative areas: Landkreise and kreisfreie Städte.
In Firebase, each region has a geoTagName field. The app compares the detected location name against this geoTagName to load the correct internal region document.
I need to understand the recommended Apple/Core Location field for this use case.
My current understanding is:
CLPlacemark.administrativeArea usually represents the federal state in Germany, for example “Thüringen” or “Bayern”.
CLPlacemark.locality usually represents the city, municipality, or town.
CLPlacemark.subAdministrativeArea seems to be the most likely candidate for the German Landkreis / kreisfreie Stadt level.
However, I need to know whether CLPlacemark.subAdministrativeArea is the correct and reliable field for identifying German Landkreise and kreisfreie Städte.
I also tested Apple Maps Server API /v1/reverseGeocode. For district-level locations in Germany, it often returns values such as:
administrativeArea: Thüringen
locality: Bad Sulza
but no value such as:
subAdministrativeArea: Weimarer Land
Example coordinate tested:
50.9957525, 11.5129989
My questions are:
Is CLPlacemark.subAdministrativeArea the recommended field to identify German Landkreise and kreisfreie Städte in an iOS app?
Are there known differences between iOS CLGeocoder.reverseGeocodeLocation and Apple Maps Server API /v1/reverseGeocode regarding subAdministrativeArea?
Does Apple provide any official list, dataset, or recommended validation method for the exact district-level names used by Core Location / Apple Maps in Germany?
How should an app distinguish cases where a kreisfreie Stadt and a Landkreis have the same name, for example:
Stadt Augsburg
Landkreis Augsburg
Stadt Ansbach
Landkreis Ansbach
Stadt Aschaffenburg
Landkreis Aschaffenburg
Should administrativeArea be avoided for this use case because it represents the federal state level in Germany?
The goal is to create reliable matching between the Apple/Core Location result and our Firebase geoTagName values.
Thank you.
Topic:
App & System Services
SubTopic:
Maps & Location
Tags:
Core Location
Apple Maps Server API
MapKit
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