diff --git a/notes.txt b/notes.txt
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@@ -37,8 +37,62 @@
 
 ## Additional Use Cases
 
+Central website has synced data, but the individual locations should manage their own data by default.
+The last synced data may be used if they either: don't want to handle it themselves, or if the ability to access the yvr. subdomain is unavailable.
+
 * Airports
+  * yyc.BLAH.BLAH
+  * yvr.BLAH.BLAH
 * Other Schools
+  * sait.BLAH.BLAH
 * Museums
+  * cmch.BLAH.BLAH (Cambridge Museum of Computing History)
 * Large Libraries
 
+## How To Do GPS
+
+### Option 1
+
+GPS for all devices.
+
+Advantages:
+
+* Easy to sync
+* Can be automatically synced
+* Can be made to very rarely have incorrect coordinates.
+* Could sync with the rest of the world, if required.
+* Can calcualte an average across time and get more accurate. (10-20 seconds, but still useful).
+
+Disadvantages:
+
+* High cost
+* (Very) High power consumption
+* More likely to require maintainence as more parts are involved.
+* Could potentially go out of sync temporarily if automated.
+  * For example: a chip in a basement could potentially receive bad data due to the concrete/metal between it and a GPS satealite.
+
+### Option 2
+
+* Separate into two models of triangulation chips.
+  * One with GPS
+  * One without
+* Use the outermost chips as GPS trackers. Get valid data at all times so that they are always in sync.
+* Generally outdoors or next to windows.
+* Only a few are necessary on the edges, and all other nodes sync by relative coordinates.
+
+### Option 3
+
+* No GPS.
+* Allow a GPS connection through USB-C(?)
+* Allow the GPS to syncronize *once* per device.
+* Potentially high maintainence cost if GPS needs to be recalibrated.
+* It shouldn't happen, but if it did... big oof.
+* However, due to the meshing capabilities, in theory two to five correctly located notes would be able to cascadingly correct issues further away from the edge nodes (the ones with GPS).
+
+### Option 4
+
+* Use the user's phone to manage GPs locations.
+* This can update potentially inaccurate data.
+  * Find a way to figure out if the phone is providing bad/invalid/inaccurate data.
+
+