Rose-Hulman Campus Drone Images for Mapping

From RHLUG Wiki
Jump to: navigation, search

Drone Mapping

Links to Map Datasets

To be done sometime

Software used for mapping

  • DroneDeploy
  • maybe some open source software? (there might be some good ones available)

Drone Mission Logs

Nov. 11, 2018

Mini mission: Jacob Rosenberg and Shihao Han (thank you for letting us use your drone, Han!)

Drone used: DJI Inspire 2

Camera Lens used: 45mm Olympus Lens (I don't remember the full model)

Resolution: 1.2 cm/pixel

Image Quality: 5.2k, JPEG (very good quality compared to part of the image, which is what is shown in DJI GS Pro app)

Mode: camera mode. video mode isn't necessary for getting a nice 3D model/map, and it sacrifices image quality/battery life for more frames in the picture.

Altitude: ~270-280 feet (around that range)

Location: near east side of campus, BSB, Moench Hall, and academic buildings close to that

Image data status: Posted onto the RHLUG Nextcloud server. To conserve server bandwidth from outside sources and spambots, only people in the Telegram group can have the link to this data FOR NOW (this will be changed in the future).

The images are "geotagged", meaning the GPS data is embedded in the picture file itself (metadata) in what's called the "EXIF" data of the image (when you view it in the Okular image viewer, use exiftool, or similar in Linux or right click on a picture > Properties in Windows).

Other notes: Make sure you have a computer with you to analyze the image footage. The DJI Go app was too slow and couldn't read much data from the SD card of the drone. Also make sure you have 2 or more people with you while flying the drone - they can help with specific parts like flying it or choosing which path to go on, etc.

Batteries lasted 15 minutes, charging takes about 30 minutes for 2 packs (4800mAh). Super short life but great image quality from the drone/lens. Important note: be sure to head back when battery is ~30-20%! Just so the drone doesn't drop onto the ground.

Also stay clear of birds, buildings, trees, etc. Get a high enough altitude. FAA limits are 400ft. We found that 270ft was much better than 100ft - we came close to hitting the smokestack but the drone did not go to it on its path, which is good.

Getting the landing to work is tricky. We used a very recent iPad Pro and the drone remote controller via a USB Type-C connection. The drone controller was customized to rotate the drone and move in a specific direction (there are more details about exactly how it rotates, it isn't perfect rotation). DJI GS Pro software worked generally well, but doesn't have auto landing. Auto landing is available in the DJI Go app.