3D scan

 We flew Skydio to perform a 3D scan of a tree & light pole and a 2D scan of the basketball court. We’ve never done 3D or 2D scans with Mavic 2 pro, and it was such a great experience to perform 2D and 3D scans. We planned 2D and 3D scans in Happy Hollow Park because we thought there was a wide-open area and there was a lot of stuff to scan such as a tall tree and the sign of Happy Hollow Park. We chose a tree to do 3 scans but that tree was so tall and it took longer time than we thought due to a lot of branches. So, we ran out of batteries for controllers as well as 4 batteries. After that, we found another place that is called West Lafayette athletic complex. the reason why we chose here is it is also a wide-open area and people don’t usually show up on weekdays. Plus, we found some interesting stuff such as trees, a basketball stand, light pole on google Maps before going to fly. Finally, we were able to scan the basketball court for a 2D scan and the light pole and tree for the 3D scan.

 

Step 1 : mission planning

 

What are we scanning?

    • 3D scan of a small object for a tree
    • 3D tower scan of small, tall object for a light pole

    • 2D map scan for the basketball court

Why are we performing a scan on these objects?

    •  The size of objects is good for 3D scanning. It has optimal height and size for a 3D scan, we did try in Happy Hollow Park at first, but the object was so big that we ran out of batteries and there were no obstacles around these objects.
    • These scans will be a good approach to deep dive in GIS in future lab.
    • My lab partner needs a 3D scan of the tree for his research.

What did we plan before going to fly(mission planning)

  •  We checked the weather conditions.
  • ·We check the potential hazards in the street view of the google maps.
  • ·We got permission from LAANCE (Class D, 400 feet)

LAANCE APPROVAL: ALTH399GNGA0

·        We made an emergency plan (return home, land as soon as possible if the aircraft looks not stable)

 

 

 

Step 2 : gathering the data

 

Weather conditions

 

·         Temperature : 71 F

·         Humidity : 73 %

·         Visibility : 10 mi

·         Dewpoint : 51 F

·         Wind speed : calm

 

Site conditions

 

    • It was wide-open area, there was no event at that time so it was not crowded.
    • The road was away from the location where we performed the mission.
    • There was a trail around the location where we performed the mission.



Potential hazards

    •  There was a trail around the location where we performed the mission.
    •  Obstacle (birds and basketball stand around the tree)

 

 

 

 

Mission 1 : the 3D scan of light pole

Before going to fly

    • We checked if there was all the equipment in the drone case.
    •  We checked if the batteries were fully charged or not as well as the controller battery.
    • Ensure that the location of the scan complies with FAA regulations.
    •  We checked for potential hazards around the light pole.
    • We made sure we had enough clear space to take off.
    • ·We selected the “3D tower capture”

 

 

In flight

 

    •  After making sure we had enough clear space to take off, we launched it.
    • VO monitored the drone's position from a different point of view.
    •  We set a geofence for safety because there was a trail around the light pole.
    •   For the better quality of the 3D scan, we increased the overlaps from the default value.
    •  We measured the size of the light pole after that, we set 43 ft for the ceiling, and 1.5 ft for the floor to get the best quality of the 3D scan
    •  We set overlaps: 85, side laps : 85 for the quality of the scan

 

Data Collection Outcomes

Time to drive to the field and set up for the mission

1.5 hours

Time to fly the mission

6 minutes flight

Number of images taken

271 pictures

Size of each image

5.38 mb

Size of the entire data

1.47 gb

 

 

 

 

 

 


Mission 2 : the 3D scan of the tree

Before going to fly

    • We checked if there was all the equipment in the drone case.
    • We checked if the batteries were fully charged or not as well as the controller battery.
    • Ensure that the location of the scan complies with FAA regulations.
    • We checked for potential hazards around the tree.
    • We made sure we had enough clear space to take off.
    • We selected the “3D capture”

 

 

In flight


    •  After making sure we had enough clear space to take off, we launched it.
    • VO monitored the drone's position from a different point of view.
    • We set a geofence for safety because there was a trail around the light pole.
    • For the better quality of the 3D scan, we increased the overlaps from the default value.
    • We measured the size of the tree after that, we set 15 ft for the ceiling, and we changed the default height(1.6ft) to 1 ft for the floor to get the best quality 3D scan(we wanted to scan the root of the tree)
    • ·We set overlaps: 85, side laps : 85 for the quality of the scan

 

 

Data Collection Outcomes

Time to drive to the field and set up for the mission

15 minutes

Time to fly the mission

4 minutes flight

Number of images taken

143 pictures

Size of each image

6.04 mb

Size of the entire data

872 mb

 

 

 

 

 

 

Mission 3 : the 2D map scan

Before going to fly

    • We checked if there was all the equipment in the drone case.
    • We checked if the batteries were fully charged or not as well as the controller battery.
    • Ensure that the location of the scan complies with FAA regulations.
    • We checked for potential hazards around the court.
    • We made sure we had enough clear space to take off.
    • We selected the “2D capture”

 

In flight

  

    • After making sure we had enough clear space to take off, we launched it.
    • VO monitored the drone's position from a different point of view.
    • We set a geofence for safety because there was a trail around the light pole.
    • For the better quality of the 2D scan, we increased the overlaps from the default value.
    • We flew as high as possible with gimbal – down
    • We set overlaps: 85, side laps : 85 for the quality of the scan

 

Data Collection Outcomes

Time to drive to the field and set up for the mission

35 minutes

Time to fly the mission

9 minutes flight

Number of images taken

82 pictures

Size of each image

5.07 mb

Size of the entire data

420 mb

 

 

 

 

 

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