Hi,
The clarification about trails and trail markers is in the Criteria Clarification Collection
It is the trail that is important not the markers. Typically by design, trail markers are very similar.
Have you a link to the trail especially one that covers the route?
Sorry I don’t read Dutch does your title and description make it clear why this marker is unique to this point? Is it key to following the trail because of a change in direction for example (a decision point).
It might be tricky if it’s at the point of the art work because the question would then be is it acting as an anchor for the art or for the trail.
Sorry if you might have addressed these already but it is the sort of info you need to make the case.
This section is for specific types of appeals.
It looks like you are querying an appeal so I can move this to the general section.