Variations in air pressure from place to place are the principal cause of wind.
Answer:
advantage
* The scale is essential consant;
*Some objects not visiable on vertical photos may be seen in obiliqe.
disadvantage
*it lacks marginal .
*it requires more training to interpert than a map.
Some reasons are business travel, family matters, reunions, parties :)
The coldest place in the northern hemisphere is
Oymyakon, the hottest El azizia, the coldest place in the southern hemisphere is Antarctica , the hottest being Port Augusta
