Classification of Surveys according to the field of work | Surveying and Levelling
In one of my previous articles regarding “Classification of Surveys“, discussion of various types of surveys have been listed out. We are now proceeding with the detail study of different types of surveys under the category of field of work.
The classification for the field of work is as follows:
Land Survey
This involved survey of objects in earth’s surface.
Hydrographic or Marine Survey
This involves survey of objects under water.
Aerial Survey
Aerial survey is carried out by an aeroplane in air.
Land Survey can be further classified into the following:
- Topographical survey
- Cadastral Survey
- City Survey
- Engineering Survey
Topographical Survey
This survey is performed or determining the natural features of the country such as rivers, mountains, hills, valleys etc. and also artificial features such as canals, railways, roads, towns, villages etc.
This helps to keep a record of existing natural features of the country.
Cadastral Survey
Cadastral Survey is similar to topographical survey. It only involves a little more precision and detailing in the process. Apart from determining the natural features, this method of survey also helps to determine boundaries of fields, houses and other properties.
Cadastral Survey maps are drawn to a more larger scale as compared to topographical survey maps.
This is performed in connection with town planning schemes such as drainage, water supply etc and for laying plots, roads, streets etc.
City Survey
City Survey is carried out in connection with various engineering works such as roads, railways etc and it also involves various works related to water supply sector such as reservoirs, wells etc.
Engineering Survey
Engineering Survey is further classified into the following three types:
- Reconnaissance Survey
- Preliminary Survey
- Location Survey
Reconnaissance Survey
This survey is performed for determining the feasibility of work and to estimate the rough cost of the scheme.
Preliminary Survey
This survey is performed for collecting more précised data to choose the best location for the work and to estimate the exact quantities and cost.
Location Survey
This survey is performed for setting out the work on the ground.