In a request for the Directions API the origin can contain textual address
or latitude/longitude value. When I use the textual address, the distance
in html_instructions per step is returned in the correct metric unit
system. But when I use a latitude/longitude value, the html_instructions
return a UK unit result. The 2 directions requests should return the same
result, but they differ in unit system in the html_instructions.

http://maps.google.nl/maps/api/directions/json?language=nl&origin=De
Gildekamp%202024,6545%20Nijmegen&destination=51.831967319929,5.796558600816&sensor=false

http://maps.google.nl/maps/api/directions/json?language=nl&origin=51.829966560399,5.79828158418&destination=51.831967319929,5.796558600816&sensor=false

In my programm I work with latitude/longitude values; how can I get a
metric response from the directions API with these?

Regards, Robert