# ENS2260 Surveying and Site Measurement

### Questions:

1. Mass data methods are used to obtain more survey points rapidly.

1. Describe and explain 5 engineering applications of LiDAR remote sensing.
2. An area of 200 km by 100 km was surveyed using photogrammetry at an average scale of 1 cm = 100 m. The standard size of a single photograph was 150 mm × 150 mm. If 10000 photos were taken in total, find the required side overlap if the longitudinal overlap was 60%. Give your answer to the nearest ten.

2. You work for a surveying company. Main roads WA has contracted your company to set out the centre line of a new highway to be constructed. You have found the following video online about a robot that can do the work more effectively: https://www.youtube.com/watch?v=ZeTJBxgSjEs

• Accuracy and precision
• Ease of use
• Productivity
• Cost per point

3. Figure 1 shows the earthworks for a proposed two-lane two way divided road to be constructed with a total width of 6 m. The height measured at each cross section is given in Table 1. It can be assumed that the slide slope is 1 in 10 from Chn1490 to Chn1500, and 1 in 5 from Chn1520 to Chn 1530.

1. Calculate the cross-sectional area at each chainage
2. Estimate the total volume of:
3. Cut
4. Fill

Table 1: Height of the cross-section

Chainage

Height of cross-section

1490

o.6

1500

2.0

1510

0.0

1520

0.5

1530

1.8