Photographie aérienne Relevé topographique LiDAR 10 points/m² 10 points/m² 10 points/m² 10 points/m² 10 points/m² 10 points/m² 10 points/m² 10 points/m² 10 points/m² 2 points/m² 10 points/m² 10 points/m²