RICS Draft Global Guidance Note: Earth observation and aerial surveys, 6th edition

RICS Draft Guidance Note: Earth observation and aerial surveys, 6th edition

Appendix B: Combined platform, altitude, data type and achievable accuracy table

The table below is an attempt to combine the detail from sections 4.3, 5.3, 6.3 and 7.3 into a single table.

Band

Platform

Height

Achievable accuracy (m) (1)

                       Example survey types/uses (2)

m

Ft

Plan X,Y

Height Z

1

UAV

30

100

0.02

0.01

  • ·         imagery and LiDAR for heritage recording and construction monitoring
  • ·         multispectral imagery for precision agriculture.

2

Helicopter

319

1,047

0.05

0.03

High accuracy imagery and LiDAR for engineering design:

  • ·         rail and
  • ·         road
  • ·         power networks.

3

Helicopter

638

2,093

0.10

0.05

Imagery and LiDAR

  • ·         engineering asset management
  • ·         mapping telecommunications networks.

4

Fixed wing

1,300

4,265

0.10

0.05

·         BIM for infrastructure

  • ·         multispectral for biomass mapping and monitoring the health of plants and crops
  • ·         imagery for cadastral mapping
  • ·         LiDAR for forestry
  • ·         hyperspectral for tree species mapping and tracking soil moisture content.

5

Fixed wing

2,600

8,530

0.20

0.10

  • ·         imagery and LiDAR for coastal management
  • ·         imagery for urban mapping and 3D city models
  • ·         thermal mapping for energy efficiency surveys and detection of pollution.

6

Fixed wing

4,500

14,764

0.38

0.19

  • ·         imagery for rural mapping
  • ·         imagery and LiDAR for river catchment flood risk management.

7

Fixed wing

7,500

24,606

0.63

0.31

  • ·         imagery for upland area mapping
  • ·         environmental impact assessments.

8

Satellite

450–770 km

279–478 mi

3–4m (CE90)

3–4m (LE90)

  • ·         satellite imagery for land cover classification
  • ·         multispectral satellite imagery for environmental monitoring and vegetation index mapping.

Table B1: Combined platform, altitude, data type and achievable accuracy table

1 Achievable accuracies are quoted in RMSE figures apart from satellite imagery, which are quoted as circular and linear errors, at a 90% confidence level.

2 The quoted achievable accuracies are not valid for the example survey types and uses utilising non-visible forms of remote sensing except for multispectral satellite imagery. Further details can be found in section 6.3.