LootAllTheStuff wrote: »Did you slot the survey before you went to Wrothgar, or after you arrived in the area you expected to see them? Resource nodes only show if the corresponding survey is slotted before you enter the sub-zone they are located in; if you forgot to slot it, you have to get far enough away from that spot so that crossing back into the area triggers the spawn. Same thing with map-based treasure chests.
BTW there is an add-on that helps figure all this out, including if you are far enough away for the node to respawn should you have more than one of the same survey.