Answer mmosite

These maps are the normal maps found at Dragonica.
Access to different field maps are through the portals, and by accessing the different towns available.
The experience given at the field maps are considerably lower than that of the mission maps.
For item-wise, equipment drops are lower as well.
However, for those who would like to save gold in the early levels, you may opt to train at the field maps occassionally.
This is because, only at field maps, monsters will drop food which can heal mana and health points, thus saving gold!
Examples: Water, Lollypop

Summary of Field Maps

♪ Pros:
Save Gold - Monsters drop food items
Monster/Treasure Chests - Chance to get Gada Coins & Eqs

♪ Cons:
Lesser Experience Points
Lesser Item Drops
No Friend Points (unless your in a party already)

At certain field maps, you might have noticed that there will be a portal/warp with a padlock over it in the mini map.

That is an example of the entrance of a mission map.
This is a list of current mission maps in Dragonica.

♫ North Windia Plains Mission Map
♫ South Windia Plains Mission Map
♫ Windia Flats Mission Map
♫ West Traitor's Ridge Mission Map
♫ East Traitor's Ridge Mission Map
♫ Bearded Whale Coast Mission Map
♫ Steven Trading Post Mission Map
♫ Mirinae Sanctuary Mission Map
♫ Valid Raeth Mission Map
♫ Forgotten Forest Mission Map

Summary of Mission Maps

♪ Pros:
Make new friends by partying
More Friend Points
More Experience Points
Always get items, no matter the rank

♪ Cons:
Tend to use more gold ~ No free food drops
No monster chests