Geocoder OpenStreetMap Nominatim not working for German Addresses

[mr-simba]

Hello,

On my Backdrop website, I have a node type that includes:

• An address field
• A geofield configured with the setting "Geocode from field address"
  (Modules: Geofield 1.x-1.0.4 and Geocoder 1.x-1.0.2)

When using Geocoder Bing (with an API key), latitude and longitude coordinates are successfully generated when I add a new node with an address. As a result, the map displays the correct location.

However, when using Geocoder OpenStreetMap Nominatim, no latitude/longitude coordinates are stored when I add a new node with an address. Consequently, the map does not work.

If I run the following code from my website, I receive a result with latitude and longitude coordinates. So I am neither banned nor firewalled from OpenStreetMap Nominatim.
$request = backdrop_http_request("https://nominatim.openstreetmap.org/search?q=Sonnenallee%201,12047%20Berlin&format=json&limit=1"); print_r($request);

Does anyone know why Geocoder OpenStreetMap Nominatim is not functioning properly?

Thanks in advance for your help!

[mr-simba]

I think I found the problem.

It was due to the specific address format used in Germany:
thoroughfare, postal_code locality, country

The address format provided by "geocoder_widget_parse_addressfield" was not compatible with OpenStreetMap Nominatim for Germany, which resulted in no latitude/longitude coordinates being returned.

Only after I moved the postal code up in geocoder.widget.inc (part of the geocoder module) it did work:

[line 463 of geocoder.widget.inc]
$address[] = !empty($field_item['thoroughfare']) ? $field_item['thoroughfare'] : NULL;
$address[] = !empty($field_item['postal_code']) ? $field_item['postal_code'] : NULL;
$address[] = !empty($field_item['locality']) ? $field_item['locality'] : NULL;

Of course, this is not a universal solution—it's specific to Germany.