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Aplitop TcpStereo


This Aplitop software allows stereo plotting in CAD platform over aerial photographs with previously defined orientations.

It works from simple anaglyph glasses to professional stereoscopic vision hardware, and it’s specially useful for photogrammetric surveys made with drones. It also can be used by public administrations, mining companies, landslide, hydrology, environment, town planning, etc.

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We must give the folder containing the image files and other data depending on the kind of project.

Digital flights

We only have to import the exterior orientations file, and we will obtain automatically the camera parameters from the metadata contained in the photographs.

Different formats of exterior orientation file are admitted so the user can specify the columns that correspond to the photo-centers coordinates and the angles of rotation of the camera for each photography.

To finish the process of import, the parameters of the camera, the average height of flight and terrain are validated.

Analog flights

In this case we will import one internal orientation file of Digi3D for image and one file with the exterior orientations. For it we have to specify the flight and other parameters of the camera such as, the focal length, the principal point, heights of flight and terrain.

Images Management

In the definition of the project, the images are converted to a pyramidal format to optimize the output during the visualization. The images are organized in strips, models and block, which can be activated simultaneously in different windows of the application.

In the toolbar we find tools for zoom, pan, scale change, mini-map. Also it allows copying the current image to the clipboard or recording it in disk.

The models can be visualized in stereo by low cost systems based on transmitters and active glasses, or mirrored screens and polarized glasses. Also it allows the pseudo-stereo view (superposed images) in conventional equipments, and can be viewed stereo using anaglyph glasses (two colors).

With the program we can see several stereoscopic models at the same time, pass automatically from a model to another one following the movements of the user in the terrain. And also it is possible to know the real coordinates of the terrain and the height; also we can measure 2D and 3D distances, slopes and elevation differences, perimeters and areas.

Configuration

We can personalize some characteristics of the application: the functions of the keyboard, speeds of the displacements in horizontal, vertical and height, the properties of the cursor (form, size, color, height text, etc.), and the way CAD drawings are represented on the stereo.

CAD Synchronisation

The program can be synchronised with some versions of AutoCAD and Bricscad, and by this way we can draw objects with constant or changeable height by means of the stereo mode and with the same coordinates.

In addition a drawing can be loaded in the CAD. Over the stereo model the drawing´s layers in which the user is interested can be showed, supporting the pan and center of the drawing automatically.

Over the stereo viewer we can:

  • Measure 2D and 3D distances
  • Measure slopes and elevation differences
  • Measure a 3D perimeter and the area contained in it
  • Place the viewer in specific terrain coordinates

We can do the following functions in the CAD from TcpStereo:

  • Rotation of the drawing: It turns the view of the drawing in the CAD to make it coincide with the stereo model´s one.
  • Show drawing: It shows the selected layers of the CAD´s drawing on the stereo.
  • Simple Drawing: draw 3D points and polylines in the CAD from points designated on the stereo model.
  • Continuous Drawing 2D: It allows drawing 2D polylines in the CAD moving the mouse (sketch), from some functioning parameters given by the user. It is suitable for the creation of contours.
  • 3D Continuous Drawing: It allows one to draw 3D polylines in the CAD moving the mouse and changing the height, interpolating the height of the points of the polyline depending on the points designated by the user
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