AGD imported benchmarks

When you import an AGD design file (Land Forming), the app reads 0MB rows as benchmarks and 2BAL{n} rows as section boundaries. Imported BMs show in the Calibrate Elevation sheet as reference rows tagged Design BM.

The reference-row list with a Design BM:

Rows are sorted by distance from your current GPS — closest BM at the top. Each Design BM row shows:

• A flag icon.
• The BM label (e.g. "Master BM") with a Design BM tag next to it.
• "Benchmark · {distance}" — live distance from your current GPS (e.g. "Benchmark · 23.4 ft").

To calibrate to an imported BM:

1. Tap the row. The sheet switches to a drive-to card.
2. The card updates as you move:
   • "Drive 23.4 ft to the benchmark" (more than 3 m away — blue)
   • "Almost there" (within 3 m — amber)
   • "On the benchmark — lower blade and calibrate" (within 0.5 m — green)
3. When the card is green, lower the implement so the cutting edge rests on the BM (or on bare ground if there is no physical pin).
4. Hold still and tap Calibrate (5s avg).
5. The app averages 5 seconds of RTK GPS, computes the offset using the BM's surveyed elevation, and applies it.

Why this is the best method:

• The surveyed elevation is recorded with field-grade precision, no drift.
• Drive-to confirmation prevents you from calibrating somewhere else by mistake.
• The 0.5 m proximity gate prevents bad calibration when you're not actually on the pin.

Map markers

AGD imported BMs also appear on the map as cyan flag markers, drawn over the cut/fill heatmap. Section boundaries (2BAL{n} loops) are dotted pink lines.