To start you will need to get to Researcher Lev vi in Levvi's Camp in the Scoured Fields. She will give you the Sample Collector which is necessary to completing the achievement and you will need to scan ten samples (out of eleven) to get the Fervid Censer backpack.
Southsun Camp Sample
Right behind Levvi's tent will be your first Sample.
Southsun Pool Sample
Head north from the Camp Karka Waypoint, keeping an eye toward the tiered water pools and you should spot it just beyond the bridge.
Southsun Lava Sample
Head towards the Karka Hive (north of Levvi's Camp) and head down the ramp leading down to the lava pool and just at the edge of the lava is your prize.
Southsun River Sample
To the Northwest of Levvi's Camp, at the head of the river you ran across to get to Levvi, will be the next Sample.
Southsun Cave Sample
Go to the Crab Toss arena and head north on the shore. You should find a group of caverns you can head into, and shortly after heading in will be the next Sample.
Southsun Sandpit Sample
Head Northwest from the Eastern Encampment Waypoint, across the Dappled Shores, to the Sandpit where the Wurms lurk. Just west of the POI will be your prize.
Southsun Geyser Sample
Head north across the Driftglass Springs and head towards the ledge of the cliff. At the edge, look to your left and you will see a path of tiered rocks leading up to the top of a spring. Jump up and you will find this sample at the heart of a Geyser.
Southsun Islet Sample
This particular sample requires you to do the Jumping Puzzle next to Lion Point. At the end of it, behind the Champion guarding a chest atop of the Strait, will be your Sample.
Southsun Shipwreck Sample
Just south of the Pride Point Waypoint, atop a jutting rock with buildings all around it. Go up behind the armorer's building and you will find this Sample tucked under some foliage and debris.
Southsun Elevation Sample
This one requires you to go atop the Karka Hive to the Champion Karka. Just at the mouth of the platform, where the Champion Karka lurks, will be this Sample. You can get it without provoking the Karka.
Southsun Vent Sample
At the area of the Jumping Puzzle, west of Lion Point Waypoint, will be a wide open area filled with Skelk, water and red mist. In one of these clouds of Mist will be your hiding Sample.