A mapflag doc
struct map_flag {
        unsigned town : 1; //Actually part of "No Kill Steal Protection", and allow mail operation
        unsigned autotrade : 1; //If bconf at_mapflag enable allow only @at on those map
        unsigned allowks : 1; // enable/disable [Kill Steal Protection]
        unsigned nomemo : 1; //disable /memo, and WE_CALLPARTNER, WE_CALLPARENT, WE_CALLBABY
        unsigned noteleport : 1; //prevent @jump, Fly Wing and Giant Fly Wing, teleport, HIGHJUMP, DIMENSIONDOOR
        unsigned noreturn : 1; //prevent "ButterFly Wing, Dungeon Teleport Scroll, Yellow Butterfly Wing...", warp savepoint, 
        unsigned monster_noteleport : 1; //prevent monster teleport
        unsigned nosave : 1; //prevent @save, save of status,lastpoint, 
        unsigned nobranch : 1; //prevent "Dead Branch, Red Pouch, Bloody Branch, Poring Box". Prevent mob to be warped in if possible (conf mob_warp) and have no master
        unsigned noexppenalty : 1; //allow player/pet/ to not lose exp when dead or using LG_INSPIRATION, PR_REDEMPTIO
        unsigned pvp : 1; //en/disable pvp (allow hitting each other, enable battle pvp reduc, pvp counter...etc)
        unsigned pvp_noparty : 1; //ignore party in pvp
        unsigned pvp_noguild : 1; //ignore guild in pvp
        unsigned pvp_nightmaredrop :1; //enable chance to lose eqp when die (doesn't requiere pvp)
        unsigned pvp_nocalcrank : 1; //disable pvp ranking calculation
        unsigned gvg_castle : 1; //this map contain a castle.
        unsigned gvg : 1; // //en/disable gvg (allow hitting each other, enable battle gvg reduc, ...etc)
        unsigned gvg_dungeon : 1; //allow gvg on this map (usually donjon)
        unsigned gvg_noparty : 1; //ignore party for gvg
        unsigned battleground : 2; // [BattleGround System]
        unsigned nozenypenalty : 1; //don't lose zeny when dead on this map. (only if conf zeny_penalty enable)
        unsigned notrade : 1; //prevent traderequest in this map
        unsigned noskill : 1; //prevent user skill usage on map
        unsigned nowarp : 1; //prevent warp m,x,y, (savepoint still allow), emergencycall, UNT_CALLFAMILY, @guildrecall, @partyrecall, @recallall, @go, @load, @jump, @warp
        unsigned nowarpto : 1; //if destination map has mapflag prevent @warp, @jump, @go, @load, @guildrecall, @partyrecall, @recallall, /memo, EMERGENCYCALL (conf emergency_call)
        unsigned noicewall : 1; //prevent WZ_ICEWALL on map
        unsigned snow : 1; //ask to make snow with clif_weather_check   
        unsigned clouds : 1; //ask to make cloud with clif_weather_check
        unsigned clouds2 : 1; //ask to make cloud with clif_weather_check
        unsigned fog : 1; //ask to make fog with clif_weather_check
        unsigned fireworks : 1; //ask to make firework with clif_weather_check
        unsigned sakura : 1; //ask to make sakura with clif_weather_check
        unsigned leaves : 1; //ask to make leaves with clif_weather_check
        unsigned nogo : 1; //prevent @go usage
        unsigned nobaseexp  : 1; //prevent baseexp gain when mob dead
        unsigned nojobexp   : 1; //prevent jobexp gain when mob dead
        unsigned nomobloot  : 1; //prevent mob to drop item. nb looted item still be droped
        unsigned nomvploot  : 1; //prevent mvp loot
        unsigned nightenabled :1; //start night effect on sd. (launched on loadendack)
        unsigned restricted : 1; //restrict skill, items by zones
        unsigned nodrop : 1; //prevent user to drop item, nb : may be bypass with inv overamount. (conf item_flooritem_check)
        unsigned novending : 1; //prevent user shop creation
        unsigned loadevent : 1; //enable event OnPCLoadMapEvent on map. (nb seem buggy with instance)
        unsigned nochat :1; //prevent chatroom creation
        unsigned partylock :1; //prevent party alteration (create, invite, leave, changeleader) nb (PartyChangeOption still allowed)
        unsigned guildlock :1; //prevent guild alteration (create, invite, leave, alliance, break, changegm)
        unsigned src4instance : 1; //Mark this map is used as a src map for instances
        unsigned reset :1; //allow neuralizer(12213) usage
        unsigned chmautojoin : 1; //prevent to auto join map channel
        unsigned nousecart : 1; //prevent open up cart @FIXME client side only atm (mapprop2)
        unsigned noitemconsumption : 1; //prevent item usage (@FIXME this should actually be nocostume for mapprop2)
        unsigned nosumstarmiracle : 1; //allow SG miracle to happen
        unsigned nomineeffect : 1; // USE_SIMPLE_EFFECT (mapprop2) @FIXME client side only atm (mapprop2)
        unsigned nolockon : 1; //disable lock (idk really what should do /noctrl)  @FIXME client side only atm (mapprop2)
    } flag;