A certain type of TNM, such as a topographic surface, can be represented through profiles which describe point elevation (z value) in a line. This action is performed over numeric model data (grid, isoline or TIM) in raster format, presenting in a chart the z value equivalent to point that define the trajectory.
The profile is plotted, starting in a defined line trajectory by the user or starting in lines that have been digitalized previously and that belong to thematic, cadastral or net model data.
To consider layer line in mentioned models, it is necessary they are active in only one visualization window.
It can be selected up to five trajectories in the same layer and their profiles showed in only one chart.
Select PROCESSING → DTM PROCESSING →PROFILE in the main menu.
Dummy Value: check in this box to enter the pixel dummy value. This dummy value will be ignored by the operation.
Trajectory Options: Select Edition or Selection option.
Selection: In this option user selects another theme.
Edition: this option puts available tool so user can create a trajectory for the profile.
Note that beside Edition there are some specific options (icons) to this selection:
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Create trajectory by click on the path. |
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Move selected point in the trajectory. |
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Add a point on selected trajectory. |
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Delete selected point from the trajectory. |
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Delete selected trajectory. |
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Invert trajectory direction. |
Use the create trajectory option to draw the trajectory on the image.
Title: previously enter a title for the graph.
Y Axis: previously enter a title for the Y Axis.
Click on the OK button.
The user can adjust the chart style by clicking on the Graphic Style button.