Answer:
The answer is below
Explanation:
1. Remote sensing Data: for example Radiometers and Photometers
2. GPS measurements : for example Geotagging, Fleet tracking
3. Surveying: for example, Theodolite
4. Aerial Photographs: for example, UAV (Unamanned Aerial Vehicles) or Drones
5. Existing digital data files: for example, Maptitude, Ordnance Survey
6. Analogue Maps: for example: Atlas
