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Le Hérou is a savage piece of nature, surrounded by the Ourthe, with small paths and peaks. Le Hérou is located in the small village of Nadrin, close to Houffalize. A vast amount of parcels in this area is managed by the Les Ondes, a holiday residence for business retreats.
In order to control the activities on their property and to get a clear view of the current situation of the parcels, a drone flight was executed.
Residence “Les Ondes” (2000 m²) has recently been tastefully renovated and refurbished with all the latest comforts. The house has kept its authentic character and can accommodate up to 25 people
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Hilly terrain makes mapping difficult
A total area of 2,5 km², situated around the Ourthe had to be covered. The terrain ranged in height from 250m till 350m. Steep rocks and dense forest limit the accessibility of the terrain.
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Flight
The flight was executed using a fixed wing system, in this case a Sensefly eBee. The eBee is a light professional drone with the possibility to execute fully automated flights. It is ultra light, resulting in flight times over 20 minutes.
Equiped with a high resolution camera, the total area was covered with 5 flights, totaling over 2000 images. Because of the hilly terrain multiple take-off areas were needed.
Detailed orthomosaic
Processing of the drone images, combined with measured ground control points resulted in a detailed ortho image of the area. A ground sampling distance (resolution) of 3 cm was achieved with an horizontal accuracy of ca. 8 cm. A 3D representation of the area gives a nice overview of the touristic zone.
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