This question should be very simple as you are from the same profession and thus knowing about the primary responsibilities should be simple. Here is a small sample list of tasks that a surveyor usually handles:
- Mapping the area
- Making computations regarding the land and taking photos as evidence
- Making drafts and mapping onsite measurements
- Determining land size and measurements
- Advising and providing information for guiding the work of engineers and workers
- Surveying water channels or land for determining the routes to be followed
This is just a sample and you can always add your own ideas to this list or modify it according to your own job responsibilities.