Photogrammetric surveys

Cloud of points

After a drone flight, the data collected by the camera is processed by a computer. Complicated, multi-hour calculations allow creation of a cloud of points.

The cloud of points is created in the 2000 system.

The photo shows a cloud of points from the entire surveyed area.

Classification and cleanup

Classification allows removal of all unnecessary image elements (e.g. trees), leaving only the terrain surface.

The cloud of points both before and after classification can be saved in the following file formats: *.ply, *.las, *.laz, *.zlas, *.koo, *.txt, *.xyz, *.dsv, *.csv, *.pts, *.cl3 and *.e57.

The classified land surface can be further cleaned, e.g. by cutting to the plot area. Cleaning up the cloud of points speeds up subsequent calculations.

The photo shows a view of the cloud of points after classification and cropping.

Creating a terrain model

The terrain model is created on the basis of triangles with of a given size. The ability to set the size of a triangle allows controlling the accuracy and size of the model depending on current needs or hardware capabilities.

The model can be saved in the following formats: *.ply, *.dxf (AutoCAD), *.txt, *.koo, *.xyz, *.stl, *.obj, *.dae, *.tiff and *.xml.

To reload a previously saved model, having it in a *.tiff format is required.

Orthophotomap

Various types of maps can be generated from the collected data.

Based on the model and photos, an orthophotomap is created, which can be saved in one of the following formats: *.jpg, *.tiff, *.pdf, *.jpe, *.png and *.kmz.

The orthophotomap can display CAD drawings used in the project, cross-section lines, earth mass calculation areas, etc.

Elevation map

The terrain model (or cloud of points) can be presented as a colored elevation map.

Contour map

A contour map is created based on a terrain model with any accuracy. It can be displayed on the model with or without captions.

The contour map can be saved in the following formats: *.dxf (2D or 3D) and *.pdf.

Each line and caption can be easily edited in the exported map. In the 3D format, each line is assigned appropriate height coordinates.

Creating cross-sections

It is possible to read cross-section lines from the model in the place designated in the program or according to the established line from *.dxf. The line may be broken. The cross-section accuracy can be freely adjusted. In addition to the basic cross-section, it is possible to generate perpendicular cross-sections with a fixed length and distance from each other.

Profiles can be saved in the following formats: *.dxf, *.pdf, *.lng and *.que.

The photo shows a view of the area with a cross-section shown underneath.

Creating videos

Based on the collected data, videos can be created, e.g. a video of a "fly over the plot" according to any route marked in the computer. For this purpose, the following are indicated, among others: subsequent points between which the virtual camera is moving, the speed of its movement, the direction in which the virtual objective is being turned to.

A sample video created for demonstration purposes is shown below.