Using Terrain Shaders

The following workflow uses the Black Mountain.gmw file that was saved at the end of the Accessing Online Data topic.

In the previous lesson, we were introduced to the structure of raster data, and we learned that its visual characteristics are determined by values associated with individual pixels. In the examples we worked with, the values in question were a combination of red, green, and blue, which applied the appropriate colors to the pixel array. In this lesson, we will continue to work with raster data, but in a different form. Instead of each pixel having a specific color they will be attributed with an elevation value, the representation of which is chosen from a list of available shaders.

The important settings for terrain visualization include:

Terrain Shader
Global Mapper includes numerous shader options to determine the colors applied to pixels in a terrain layer. The shader used to display data in the workspace can be changed with the dropdown menu found on the View toolbar.

Hill Shade
Hill Shade refers to the light and shadow effects that can be applied in conjunction with the selected shader in Global Mapper. Hill shade can be toggled on and off with the Enable/Disable Hill Shade button in the View toolbar and the effect can be customized by clicking the adjacent Dynamic Hill Shading button.

Using the Black Mountain workspace, follow along as the instructor explores the use of shaders for terrain visualization.

  • Global Mapper includes several pre-installed shaders that provide differing representations of the terrain.
  • The Dynamic Hill Shading tool can be used to modify the shadows and texture of the terrain display.
  • The ability to create a custom shader offers unlimited options for terrain colorization.
  • Click here for more information on the terrain shader options in Global Mapper.

Click on the Mark Complete or Next Topic button to learn more about Using the 3D Viewer in Global Mapper.