Checklist (+2)

Checklist

• Layer loads and layer.isValid() returns True
• Feature count matches expected (layer.featureCount())
• CRS is correct (layer.crs().authid() == expected EPSG)
• Geometry is valid (run native:fixgeometries if not)
• Well coordinates plot in correct basin/region (visual sanity)
• Reprojected coordinates match manual calculation spot check
• Output file size is non-zero and opens in external QGIS GUI

Coordinate Sanity Check

# Spot check: print first 3 well locations
for feat in layer.getFeatures():
    pt = feat.geometry().asPoint()
    print(f"{feat['well_name']}: lon={pt.x():.4f}, lat={pt.y():.4f}")
    if limit_counter := limit_counter + 1 >= 3:
        break

Marine-Offshore CRS Reference