polyconic projection

over video clip explains you the principle of polyconic forecast.
polyconic estimate in location is extremely crucial for making map forecast.

You can likewise see –

ZENITHAL PROJECTION
1) polar zenithal equidistant estimate – https://youtu.be/WLtgKmd4820
2) polar zenithal equivalent location forecast – https://youtu.be/lYgHDm6gLu8
3) gnomonic polar zenithal forecast – https://youtu.be/VWRL4QKtUQE

CONICAL PROJECTION
1) one conventional parallel conelike forecast – https://youtu.be/C0XHMJL5lEc
2) cone-shaped forecast with 2 conventional parallel – https://youtu.be/asDl6VWCLXc

CYLINDRICAL PROJECTION
1) round equivalent location forecast – https://youtu.be/nFgjDn5wJcM
2) round equidistant estimate – https://youtu.be/6t5ImZavExw