Relief Maps

Create 3-D relief maps, drape data over terrain, customize shading and lighting

A relief map illustrates terrain or other surface texture by using shading and lighting. Use these functions to create relief maps from gridded data, adjust shading and lighting, exaggerate terrain, and apply colormaps. You can also drape data over elevation maps.

Functions

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Plot Data

`meshlsrm`	定期数据网格的三维点阴影救济
`surflm`	3-D shaded surface with lighting on map axes
`surflsrm`	3-D lighted shaded relief of geolocated data grid
`surfacem`	Project and add geolocated data grid to current map axes
`zdatam`	Adjustz-plane of displayed map objects

Apply Colormaps, Lighting, and Shaded Relief

`demcmap`	Colormaps appropriate to terrain elevation data
`lightm`	Project light objects on map axes
`shaderel`	Construct`cdata`and colormap for shaded relief

Change View

`camposm`	Set camera position using geographic coordinates
`camtargm`	Set camera target using geographic coordinates
`camupm`	Set camera up vector using geographic coordinates
`daspectm`	Control vertical exaggeration in map display

Topics

Shade and Light Terrain Maps

Light a Terrain Map of a Region
Add lighting and shading to terrain maps, then set surface reflectance properties.
Surface Relief Shading
A shaded-relief map models illumination over a surface to highlight the texture of the surface.
Colored Surface Shaded Relief
This example shows how to illuminate surface texture over colored elevation data using shaded relief computations.
Relief Mapping with Light Objects
This example shows how to illuminate surface texture over colored elevation data using a light source.

Drape Data on Elevation Maps

Drape Data on Elevation Maps
You can drape satellite data over a grid of elevations in order to see the topography of the surface.
Drape Geoid Heights Over Topography
This example shows how to drape the figure of the Earth, shown as an attribute (color) data grid, on topographic relief.