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Jose Luis Landivar S
Jose Luis Landivar S
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I am currently doing a research on how to create a more precise DTM to calculate plant height for plants under 2 meters (needs to be very precise). There are 3 methods to create a DTM:

  • Collecting data when there is only ground. This will be your DTM (can be done for crops since they grow seasonal, but no in the case of trees).
  • Interpolate points from the ground.
  • Use automatic classification. I have use automatic creation of DTM in PIX4DMapper and it has resulted in almost the same accuracy or even better than the DTM from colecting a dataset of only ground. The reason for this is you do not have the overlaping inacuracy between 2 datasets (even when using GCPs or RTK or PPK, there is always some error).

Drone suggestions to improve DTM:

  • High side & front overlap (80-90)
  • HighLow GSD (fly lower and also with a high resolution camera)
  • Make sure drone is updated and calibrated (IMU, Compass) before each flight
  • If using GCPs, make sure there is high image overlap where the GCPs are. If they are in the border, increase the flight mission margin

I am currently doing a research on how to create a more precise DTM to calculate plant height for plants under 2 meters (needs to be very precise). There are 3 methods to create a DTM:

  • Collecting data when there is only ground. This will be your DTM (can be done for crops since they grow seasonal, but no in the case of trees).
  • Interpolate points from the ground.
  • Use automatic classification. I have use automatic creation of DTM in PIX4DMapper and it has resulted in almost the same accuracy or even better than the DTM from colecting a dataset of only ground. The reason for this is you do not have the overlaping inacuracy between 2 datasets (even when using GCPs or RTK or PPK, there is always some error).

Drone suggestions to improve DTM:

  • High side & front overlap (80-90)
  • High GSD (fly lower and also with a high resolution camera)
  • Make sure drone is updated and calibrated (IMU, Compass) before each flight
  • If using GCPs, make sure there is high image overlap where the GCPs are. If they are in the border, increase the flight mission margin

I am currently doing a research on how to create a more precise DTM to calculate plant height for plants under 2 meters (needs to be very precise). There are 3 methods to create a DTM:

  • Collecting data when there is only ground. This will be your DTM (can be done for crops since they grow seasonal, but no in the case of trees).
  • Interpolate points from the ground.
  • Use automatic classification. I have use automatic creation of DTM in PIX4DMapper and it has resulted in almost the same accuracy or even better than the DTM from colecting a dataset of only ground. The reason for this is you do not have the overlaping inacuracy between 2 datasets (even when using GCPs or RTK or PPK, there is always some error).

Drone suggestions to improve DTM:

  • High side & front overlap (80-90)
  • Low GSD (fly lower and also with a high resolution camera)
  • Make sure drone is updated and calibrated (IMU, Compass) before each flight
  • If using GCPs, make sure there is high image overlap where the GCPs are. If they are in the border, increase the flight mission margin
Source Link
Jose Luis Landivar S
Jose Luis Landivar S
  • 488
  • 3
  • 13

I am currently doing a research on how to create a more precise DTM to calculate plant height for plants under 2 meters (needs to be very precise). There are 3 methods to create a DTM:

  • Collecting data when there is only ground. This will be your DTM (can be done for crops since they grow seasonal, but no in the case of trees).
  • Interpolate points from the ground.
  • Use automatic classification. I have use automatic creation of DTM in PIX4DMapper and it has resulted in almost the same accuracy or even better than the DTM from colecting a dataset of only ground. The reason for this is you do not have the overlaping inacuracy between 2 datasets (even when using GCPs or RTK or PPK, there is always some error).

Drone suggestions to improve DTM:

  • High side & front overlap (80-90)
  • High GSD (fly lower and also with a high resolution camera)
  • Make sure drone is updated and calibrated (IMU, Compass) before each flight
  • If using GCPs, make sure there is high image overlap where the GCPs are. If they are in the border, increase the flight mission margin