Visualizing in 3D
See about
visualization in planar projection in the SPRING
Visualizing 3D Image:
- select, in the "Control Panel",
a numerical Information Layer (IL) which has a Grid representation
(rectangular grid);
- select, in DTM in the main menu, 3D Visualization...
to open the associated window;
At the "3D Visualization" window, proceed as follows:
- press the Texture Layer...
button to select a category and an associated information layer which has a texture
image. The "Categories and Layers"
window is presented (see how to proceed). After selecting the options in this window,
press the Apply button to confirm the image
IL selection;
- after selecting the texture image, the Limits text fields are automatically
filled up with the bounding box (Xmin:, Xmax:, Ymin: and Ymax:),
in planar coordinates and using the height values (Zmin: and Zmax:),
minimum and maximum, from the selected texture image. Besides this, the other
"3D Visualization"
windows parameters are initialized with the default values;
- select the Projection type desired: Parallel, Perspective or
Stereoscopic pair;
- if the Parallel projection was selected:
- define the Azimuth, value that is given by the observer's
angular direction (in degrees) related to the South, in the counter-clockwise;
- define the Elevation, value that is given by the observer's
angular direction (in degrees) related to the horizontal plan.
- if the Perspective projection was selected:
- define the observer's position parameters "X:","Y:"
(using planar coordinates) and "Z:" (height value);
- define the Azimuth, value that is given by the observer's
angular direction (in degrees) related to the South, in the counter-clockwise;
- define the Elevation, value that is given by the observer's
angular direction (in degrees) related to the horizontal plan.
- define an Aperture value, that represents the observer's
angular aperture (in degrees);
- if the Stereoscopic Pair projection was selected:
- define the Azimuth, value that is given by the observer's
angular direction (in degrees) related to the South, in the counter-clockwise;
- define the Elevation, value that is given by the observer's
angular direction (in degrees) related to the horizontal plan.
- define a value for the Distance between Projections, which is a distance
value between two images in the stereoscopic pair (in pixels);
- define a value for the Vertical Exaggeration, which is a value applied to
the model heights and determines the vertical scale for the image presentation;
- press the Apply button, to
visualize the DTM with texture in a planar projection.
NOTE: The 3D visualization result can not be directly printed using the
SPRING, but it is possible to create an image file in the JPEG format with
all the contents of the active window. Once this file is created it can be opened or
used in other application. See how to save the active window as a JPEG image;
Saving a 3D image in JPEG format:
- after visualizing the 3D image, as described above, select File - Save
as JPEG Image, in the main menu;
- in the "Save File As"
select the directory/folder where the file will be created and type
the file name;
- press the Save button, to create
the image.
See also:
How to generate a rectangular grid (Grid)
How to generate a triangular grid (TIN)
Other DTM products
in the SPRING
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