Tes5Mod:Mod File Format/LCTN
LCTN records are locations.
Locations are not primarily physical location data (those would be WRLD/CELL), they are a record tying together references of all types (Actor, Items, Places) and are usually assigned to a cell/dungeon/world area. A location can be as big as an entire hold, or it can be a single campfire in the wilderness.
Since Dawnguard the name of several fields are changed from previously L* to their A* counterpart. The content of those fields seems to be unchanged.
|-||ACPR/LCPR||population refs||struct||arbitrary total count of 12 byte struct|
|-||RCPR||population refs||formID||Actors - there is only one instance of this in the game data, in the Dawnguard version of MilitaryCampRiftImperialLocation|
|-||ACUN/LCUN||unique refs||struct||arbitrary total count of 12 byte struct|
|-||ACSR/LCSR||static refs||struct||Location Ref Types - arbitrary total count of 16 byte struct|
followed by an arbritrary number of int16 pairs
|-||ACEP/LCEP||enable points?||struct||arbitrary total count of 12 byte struct|
|-||FULL||full name||lstring||Full (in-game) name|
|-||KSIZ||keyword count||KSIZ||Keyword count|
|-||PNAM||parent location||formID||Parent LCTN formID.|
|-||FNAM||unknown||formID||Unreported Crime Faction|
|-||MNAM||marker||formID||World Location Marker Ref - reference REFR formID to a STAT|
|-||RNAM||unknown||float||World Location Radius|
|-||NAM0||unknown||formID||Horse Marker Ref|