Survey Says

Requirements:

Chop 16 Non Sapling Pines
Craft 8 Abstract Symbols
Upgrade the Survey Office

Rewards:

New Flag and More Symbols Unlocked, 3 Juniper Berries, Frontier Fritter

Comes from:

Surveyin' The Situation

Spawns:

Red Flag, Red Flag

Notes: Patch crafting details are HERE. Building details are HERE.