Coordinate spreadsheets often fail because column meaning is ambiguous rather than because the numbers are unreadable. Explicit mapping prevents latitude/longitude swaps and keeps row-level source references.
A practical preparation workflow
- 1
Select plot ID and coordinate columns.
- 2
Declare CRS and axis order.
- 3
Validate each row and export normalized features.
What to check
- Unique plot IDs
- Numeric coordinate values
- Axis order
- Duplicate and out-of-range rows
Keep this limitation visible
Country checks and area calculations require verified boundaries and geodesic parity before production use.