📡 Radiation Survey

0/4 steps

STEP 1

Select Station

STEP 1 — SELECT INSTRUMENT STATION
Choose a location that sees all points.

Criteria:
• Central position to all features
• Stable ground
• Clear sight lines
• Known coordinates (set up on control) or
  unknown (will need resection)

Training rule:
If you are not on known control, do NOT start measuring “detail points” yet.
First determine your station coordinates by resection (3+ known points) or by GNSS.

Quality tip:
Avoid very short rays (tiny distances) and very long rays in one setup. Keep geometry reasonable.

🔗Open METARDU Tool → COGO (Radiation)

STEP 2

Set Up & Occupy

STEP 2 — SET UP INSTRUMENT
Centre and level the total station.

1. Set up tripod
2. Mount total station
3. Optical plummet to station
4. Fine level
5. Record HI (instrument height)

🔗Open METARDU Tool → COGO (Radiation)

STEP 3

Take Readings

STEP 3 — COLLECT RADIATION POINTS
Record bearing and distance to each feature.

For each point:
1. Aim at prism
2. Record horizontal angle
3. Record slope distance
4. Record vertical angle (for elevation)
5. Record prism height

Tip:
Use descriptive point names (e.g., "tree1",
"corner_fence", "road_edge")

Training checklist (detail survey discipline):
□ Agree point naming with your office standard
□ Record feature codes if required (fence, edge, building corner)
□ Re-observe 1 in every 10 points as a check
□ If elevations matter: record HI and HR consistently (don’t mix)

Stop rule:
If you lose orientation (backsight moved / wrong point), stop and re-orient before continuing.

🔗Open METARDU Tool → COGO (Radiation)

STEP 4

Process Data

STEP 4 — PROCESS IN METARDU
Enter observations in Radiation mode.

In METARDU:
→ COGO Tools → Radiation
→ Enter station coordinates
→ Enter bearing and distance for each point
→ Coordinates are computed automatically

For multiple stations:
→ Use Radiation from each station
→ Points will have multiple observations

🔗Open METARDU Tool → COGO (Radiation)