Function getZonePlacementMetrics

src/components/CropPlanningSection.tsx:1469–1485

(field: Field, zone: CropZone)

  }
  return inside;
}

function getZonePlacementMetrics(field: Field, zone: CropZone): ZonePlacementMetrics {
  const zoneAreaSqM = Math.max(field.area * 10000 * (zone.area_pct / 100), 90);
  const exactSpacing = Math.max(zone.spacing_m, 0.2);
  const exactPlantCount = Math.max(1, Math.round(zoneAreaSqM / (exactSpacing * exactSpacing)));
  const maxForZone = Math.round(MAX_GRID_MARKERS_TOTAL * (zone.area_pct / 100));
  const visualSpacing = exactPlantCount > maxForZone ? Math.sqrt(zoneAreaSqM / maxForZone) : exactSpacing;
  const visualPlantCount = Math.max(1, Math.round(zoneAreaSqM / (visualSpacing * visualSpacing)));

  return {
    zoneAreaSqM,
    exactSpacing,
    visualSpacing: roundTo(visualSpacing, 1),
    exactPlantCount,
    visualPlantCount,
    sampled: visualSpacing > exactSpacing,
  };
}