| Surface Theme Type | Illustration |
|---|---|
| Height - Changes the display based on elevation.
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| Slope - Changes the display based on ground slope or steepness. For example, you can use gray to show areas with a slope of less than 10%.
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| Aspect - Varies the display based on the direction of ground slope.
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Create a theme on height to analyze the elevation data, a theme on slope to help you determine which areas are flat enough for developing houses, or a theme on aspect to help you find the best drainage routes.