From Guild Wars 2 Wiki
If you have lost your boundary markers, this may help.
— In-game description
|Primeval Steward||Tomb of the Primeval Kings||Desert Highlands||0|
- If you have lost or otherwise not consumed one of the items required for the Walk the Land collection, purchasing this map will grant the missing items and allow the collection to be completed.
- If all items have been consumed, purchasing this map will do nothing.