We managed to complete an aerial roof inspection at TBS Engineering in Brockworth Estate, Gloucester. The client needs yearly visual inspections on all of the guttering and vents, and this is our second HVAC inspection. This time we have performed the aerial drone roof inspection using a thermal drone; The DJI Mavic 2 Enterprise Advanced. This drone has an excellent 48megapixel camera, alongside a good resolution thermal infra-red camera, which allows us to see differences in heat in the heating, ventilation and air conditioning vents which are usually difficult to see when blocked.
Using the M2EA’s automated 3D mapping feature, we were able to create a photogrammetrically orthorectified image using both visual and thermal images. Alongside this, we manually flew the drone over the blocked vents and used the side-by-side thermal and visual camera to better illustrate how heat dispersion is irregular from the vents due to blockages. You can also easily see the blockages in the visual image.
An orthomosaic is a photogrammetrically orthorectified image product mosaicked from an image collection, where the geometric distortion has been corrected and the imagery has been colour balanced to produce a seamless mosaic dataset. We used Drone Deploy software to make this possible.