Engineering Survey | Reconnaissance Survey | Preliminary Survey | Location Survey

The survey which is conducted for determining quantities and for collecting data for the designing of engineering works such as roads, railways, etc., is known as Engineering
Survey.
Engineering survey have following types:

Reconnaissance* Survey
The Survey which is done for the feasibility* and rough cost of the project
is known as Reconnaissance Survey.
Preliminary Survey
The survey in which more precise information is required for the choice of best location
for the project and to estimate the exact quantities and costs of project is known as
Preliminary Survey.
Location Survey
The survey for setting out the work on the ground is known as location survey.

Reconnaissance means military observation of an area to gain information.
Feasibility means either the project will complete or not.