Roof Inspection
Status 03.05.2023
Technical specifications
Shutter speed: Always shutter priority → Try to set at least 1/320 or 1/500 or faster.
Aperture: Not with the aperture completely open
ISO: Depends on the camera, but not higher than 400.
JPGs only - NO RAWs required.
Photo format: no 16/9, always use the full sensor size (e.g. 4/3 etc.)
General Info
Read the job description. In case of ambiguity, don't hesitate to ask FairFleet for advice.
Please ensure a professional appearance.
If a time has been agreed upon, please be there 10 minutes early rather than "only" on time.
Please bear in mind that residents/tenants, for example, are not always happy when photos are taken. Therefore, be sensitive to them and if problems arise, call FairFleet.
If you have to postpone the date or the weather is not as planned, exclusively inform the FairFleet team as early as possible.
What do I have to photograph?
- Close up images
- Close up videos
- Low mapping flight
- High mapping flight
- 1x 360° Panorama
It is possible that not all of the above points apply to your project. Therefore, always refer to the job description for the scope of work and contact us if you have any questions.
- Close up images
Position of the drone: Just above the roof
Gimbal angle: -45° from horizontal
Overlap: 10% using grid lines
Capture Mode: Manual
It is important that the drone comes to a complete stop in the air for each frame!
High shutter speed to avoid motion blur at all costs
Here you can access our Motion-Blur Calculator to calculate the correct shutter speed.
All yellow arrows are flight routes, which should be executed orthogonally around the roof if possible.
Approach the roof and fly over it with the pitch of the roof and take several photos from the gutter to the ridge. The gutters need to be clearly visible!
Important: For each picture a NEW position must be taken. Do not rotate the drone while hovering!
Be sure to include the following details:
Roof slopes
Ridges
Angles
Covers on the edge
Rain gutters
Skylights
The aim is to get a comprehensive impression of the condition of the roof
2. Close up video
Position of the drone: Just above the roof
Gimbal angle: -45° from horizontal
Flight path: All around the roof and gutters
Capture Mode: Manual or Preplanned
For the technical requirements of videos, please read our video guideline
Important: Watch out for obstacles when flying sideways!
3. Low mapping flight (Ortophoto)
Position of the drone: about 10m above the roof
Gimbal angle: -60° from horizontal
Overlap: 40% front and side overlap
Capture Mode: Double grid
High shutter speed to avoid motion blur at all costs
Here you can access our Motion-Blur Calculator to calculate the correct shutter speed.
It is possible that not all of the above parameters apply to your project. Therefore, always refer to the job description for the scope of services and contact us if you have any questions.
4. High mapping flight (Orthophoto)
Position of the drone: about 60m AGL
Gimbal angle: -90° from horizontal / NADIR
Overlap: 80% front and side overlap
Capture Mode: Single grid but of the whole AOI that is provided, not just the buidling.
At least 3 rows must be flown. If the AOI is too small -> increase overlap. We need at least 30 images.
High shutter speed to avoid motion blur at all costs
Here you can access our Motion-Blur Calculator to calculate the correct shutter speed.
It is possible that not all of the above parameters apply to your project. Therefore, always refer to the job description for the scope of services and contact us if you have any questions.
5. 360° Panorama
Position of the drone: 15m above roof, in the middle of the roof
Capture Mode: Auto DJI mode
Upload: stitched JPG image from DJI and raw unstitched photos as well
It is possible that not all of the above parameters apply to your project. Therefore, always refer to the job description for the scope of services and contact us if you have any questions.
Extra requests of the contact person on site
If the contact person on site would like additional recordings:
Please contact us immediately. Only in this way can the request be addressed directly and ambiguities can be ruled out.
If it is outside our office hours, please send us an email immediately.
IMPORTANT:
Never hand over material to the contact person on site, unless we have instructed you to do so.
Never give recordings away.
Order completion
Check that the app has captured the full number of images when you have finished.
-> If not, repeat the flight!
Are the images sharp? Sharpness check!
-> If not, repeat flight and set focus manually to infinity.
To much motion blur?
-> Repeat flight!
Is the sun too low so that it burns out?
-> Set AEB/HDR and repeat flight.
IMPORTANT:
Shots that are blurred, incomplete or incorrectly exposed will not be paid for.
The pilot is obliged to repeat the shots at his own expense, as it is part of his service to deliver flawless material.
The data has to be uploaded within 24 hours after the shoot.
Data upload
Checklist and summary
The most important points are:
Drone set up correctly?
Were all perspectives photographed?
Are all mission parts done?
Are all pictures sharp and correctly exposed?
Then the job is completed on site and the FairFleet team is waiting for the upload. By the way, you can also leave a comment for the FairFleet team in the portal after you have marked the job as completed.