Tutorial:Plotting features on a 3-D surface

[Chuan1937]

Tutorial:Plotting features on a 3-D surface.
Preview: https://pygmt-dev--4466.org.readthedocs.build/en/4466/tutorials/advanced/features_on_3d_surface.html
Issue : #3429

[Copilot]

Pull request overview

Adds a new advanced PyGMT tutorial demonstrating how to overlay additional map features (coastlines, symbols, and text) on top of a 3-D topographic surface created with Figure.grdview, addressing the need described in Issue #3429.

Changes:

• Introduces a new Sphinx-Gallery tutorial script with three examples: coastlines, plot3d symbols, and text annotations on a 3-D surface.
• Uses Taiwan earth relief as the common dataset and consistent 3-D perspective settings across examples.
• Sets a gallery thumbnail selection for the multi-figure tutorial output.

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[Chuan1937]

Why is the color not the right color. I follow the example below:

@seisman

[Esteban82]

Just to confirm: PyGMT uses GMT under the hood for 3D plotting, so it behaves the same way.

It might be worth mentioning that 3D rendering relies on a painter’s algorithm (depth sorting). This means that in some cases the result may not be visually correct. For example, a city or road that should be hidden behind a mountain may still be visible from some viewpoints due to the painter’s algorithm (no true occlusion).

[Chuan1937]

Just to confirm: PyGMT uses GMT under the hood for 3D plotting, so it behaves the same way.

It might be worth mentioning that 3D rendering relies on a painter’s algorithm (depth sorting). This means that in some cases the result may not be visually correct. For example, a city or road that should be hidden behind a mountain may still be visible from some viewpoints due to the painter’s algorithm (no true occlusion).

Thanks, I've add it.

[seisman]

Why is the color not the right color.

Try putting pygmt.makecpt after creating the Figure object.