Plane Surveying |
Geodetic Surveying |

Curvature of the earth is not taken in to consideration |
In this curvature of earth is considered. |

In plane Surveying, line joining any two points of triangle formed by any three points is considered as straight line and plane triangle are assumed to be plane angles. |
In geodetic surveying line joining two points of triangle formed by three points is considered as curved line of spherical triangle and angles of triangle are considered as spherical angles. |

This survey is done on smaller area less than 250km2 |
This survey is done on large area greater than 250 km2 |

Required accuracy is competitively low. |
High accuracy is required |

Simple methods and instruments can be used as the required accuracy is low. |
Very refined methods and instruments are used. |