Correct Answer - Option 4 : Map Study, Reconnaissance, Preliminary Survey and Detailed Survey
Concept:
Preliminary survey plans showing details of the various alternative alignments and all information collected should be normally drawn to scale of 10 cm = 1 km i.e. 1 cm = 100 m to 25 cm = 1 km.
Detailed cross-sections are generally drawn to the natural scale of 1 cm = 2.0 to 2.5 m. Cross-section should be drawn every 100 m or where there are abrupt changes in level.
Land acquisition plans and schedules are usually prepared from the survey drawings for land acquisition details. These plans show all general details such as buildings, wells, nature of gradients and other details required for assessing the values. The scale adopted maybe 1 cm = 40 m or less.
Detailed design for cross drainage and masonry structure is usually drawn to scale of 1 cm = 1 m. For details of any complicated portion of the structure enlarged scales up to 8 cm = 1 m or up to half full size may be employed. However, the size of the drawing should not exceed the standard size. Cross-sections of streams should be to a scale of not less than 1 cm = 10 m.
The sequence of survey in a project is
i. Topographic survey or map study
ii. Reconnaissance
iii. Preliminary survey
iv. Final location and detailed survey
