DJI Terra Advanced, Pro, and Electricity can be purchased through Heliguy.

The DJI Terra Advanced, Pro, and Electricity plans are only valid for one year. Your licence comes into effect starting the day the device is bound to DJI Terra.

Each activation code can be used with a DJI account to activate a licence, which can be bound to a maximum of three Windows computers. The binding will be permanent and once bound, cannot be unbound.

Phantom 4 RTK, Phantom 4 Pro V2.0, Phantom 4 Pro+ V2.0, Phantom 4 Pro, Phantom 4 Advanced and Phantom 4. The Phantom 4 does not support 2D Real-time Mapping.

DJI Terra supports NDVI, GNDVI, NDRE, LCI, and OSAVI vegetation indices on the Phantom 4 Multispectral, but does not have a vegetation index calculator function. Currently, the 2D Multispectral Construction mode does not support data from any other multispectral cameras other than the P4 Multispectral.

While connected to the internet, log into your account and bind a computer to the licence so you can use the paid features of DJI Terra within the next two days even if you are not connected to the internet.

There are three possible reasons cause this problem:

DJI Terra’s Oblique Mission uses five flight routes to capture the same amount of data as using five cameras simultaneously on a drone. The five flight routes correspond to the five camera headings – downward, forward, backward, leftward and rightward.

If you have access to a mobile device that has an internet connection (such as a cellphone), you can turn on the hot spot so that the laptop can be connected to the internet. If the site where you are operating has no internet signal, you can pre-plan the flight route while you are indoors and have an internet connection, or manually fly the drone around the area to be mapped to set boundaries points to plan flight routes.

In photogrammetry and remote sensing, ground sample distance (GSD) in an aerial digital photo (such as an orthophoto) of the ground is the actual distance on the ground captured as represented by pixels. The unit is cm/pixel.

Relative Height in Advanced Settings is the height of the takeoff point relative to the area being mapped. Mission Altitude is the height of the drone relative to the area being mapped, which is also how ground sample distance (GSD) is calculated..

When there is a large difference between the elevation of the takeoff location and the elevation of the area being mapped, you can adjust the Relative Height in Advanced Settings to ensure that the Mission Altitude is determined considering the elevation of the area being mapped. For instance, if the drone takes off from a 50m building and the expected altitude for aerial data collection is 100m, you can set the Mission Altitude in Basic Settings to 100m, and Relative Height in Advanced Settings to 50m.

t is recommended to have a forward overlap rate of 80% and a side overlap rate of 70%, which should meet the requirements for most application scenarios. The overlap rate can be increased when the area being mapped has a large difference in elevation to ensure the highest point mapped has enough overlap. When the area mapped is relatively uniform in elevation, the overlap rate can be adjusted lower to reduce the amount of data that needs to be processed, making the mapping mission more efficient. However, it is recommended to keep the forward overlap at a minimum of 65% and side overlap at a minimum of 60%.

It could be that you are operating somewhere with a lot of signal interference or obstructions, which affects the strength of the RTK signal. Try turning off the RTK module and take off manually with the GNSS positioning. Once the drone reaches a height where there is less interference, you can turn on the RTK module and connect to DJI Terra to conduct your flight missions.

Phantom 4 RTK (Remote Controller), Phantom 4 Pro V2.0, Phantom 4 Pro + V2.0. Note: point clouds may be of poor quality be unavailable in environments without RTK signals.

Yes.

Currently, DJI Terra does not support GCPs, but a similar mapping accuracy can be achieved by using DJI Terra with Phantom 4 RTK without marking GCPs.

To build reconstruction models as quickly as possible, DJI Terra uses all the computer resources available, including the CPU, RAM, and VRAM of the graphics card, which could make the computer slower while running DJI Terra but should not be a problem once the processing is finished. It is recommended that you don’t run other programs that might be GPU-intensive while running DJI Terra, as doing so could result in failure of model reconstruction.

The Field Scenario is designed to capture data from a relatively flat land, for example rice or wheat fields. 

The map tiles in DJI Terra use the Web Mercator projection. The digital orthophoto map (result.tif) and digital surface model (dsm.tif) use the Universal Transverse Mercator (UTM) projection, where the projected zone number is calculated by taking the average of longitude coordinates collected.

There is no difference. If only Nadir view images are available, it is recommended to use a mapping mission for building 2D maps. If oblique photos are available, you can choose an oblique photography mission.

There are three options for reconstruction resolution: high, medium, and low, which will generate models at full, half, and quarter resolution respectively. The higher the resolution the better the quality of the reconstructed models. The rough ratio of time consumption for reconstruction at high:medium: low resolutions is about 16:4:1.

Gaps in the model can be due to missing shots of the area being mapped, or images taken at poor angles. The quality of reconstruction can be affected by factors such as reflective surfaces in the area (water or glass), or large areas of the same colour or pattern (white walls, skies).

Currently this function is not supported. If you would like to edit the model, you can export it and edit in another software.

In addition to the map tiles shown in the app’s interface, DJI Terra’s 2D maps provide digital orthophoto maps and digital surface models in the GeoTIFF format used with UTM projection. DJI Terra’s 3D model reconstructions contain texture mesh in .ply format and level of detail model in .osgb or .b3dm formats.

The accuracy of the reconstruction can be affected by factors such as camera distortion, image quality, flight height, side and forward overlap settings, GPS (RTK) positioning accuracy and the area’s texture information.

When using the Phantom 4 RTK, the absolute accuracy achieved by the 2D maps in DJI Terra is around 1 to 2 times the GSD, which is a similar level of accuracy as other data processing software. When flying at 100m height, the absolute horizontal accuracy of the 2D map is 2-5cm, and the absolute accuracy of the 3D models is within 4cm.

The coordinate system used depends on the location of data collection. When using the Phantom 4 RTK to collect data, you can choose the coordinate system of the RTK module on the remote controller from the China Geodetic Coordinate System 2000 (CGCS2000), the World Geodetic System 1984 (WGS84, which is the default system), or a custom coordinate system. If you use another drone, the images collected have coordinates from the WGS84 system. The elevation of the data collected with the CGCS2000 and WGS84 system is the ellipsoid height.

Currently you cannot run multiple missions due to limitations in the computer’s processing capacity.

Update the GPU driver.

No.

GeoTiff orthophotos and digital surface models generated by DJI Terra already include the geometric transformation information of the images. If a separate TFW file is needed, a third-party GIS software can be used to open the results and export the corresponding TFW file.

No. Currently RGB images are required for 2D multispectral reconstructions.

Answer - Here is the answer.

When you convert .ply files generated in DJI Terra into .obj files, you can import them into Maya, Blender, SketchUp, and 3ds Max. Look up tutorials for the specific process for each software.

Yes, .b3dm, .osgb, and .ply files generated by DJI Terra are universal file formats and can be embedded into webpages. You can find instructions for embedding each of these formats online.

Theoretically they can be used to reconstruct 3D models although the quality might suffer. They cannot be used to build 2D reconstructions.