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Surfer
Shaded Relief Maps
| Surfer Shaded Relief maps create a shaded relief map from
a grid [.GRD] file or USGS DEM file. These maps use different colors to indicate
surface slope and slope direction relative to a user-defined light source
direction. Surfer determines the orientation of each grid cell on the surface,
and assigns a unique color to each grid cell. Colors on shaded relief maps are
associated with light striking the surface. The light source can be thought of
as the sun shining on a topographic surface. Surfer automatically blends colors
between percentage values so you end up with a smooth color gradation over the
map. You can add color anchors so each anchor point can be assigned a unique
color, and the colors are automatically blended between adjacent anchor points.
This allows you to create color maps using any combination of colors. Shaded
relief maps can be created independently of other maps, or can be combined with
other maps in map overlays (using the Overlay Maps command). Shaded Relief maps
can be scaled, resized, limited, and moved in the same way as other types of
maps. |
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Combine a shaded relief map with contour
and base map features.
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Shaded Relief Map
Features
- Create photo-quality relief maps from grid files
- Control light source position, relative slope gradient,
and shading
- Use custom color spectrum files for the exact desired
display
- Overlay with contour, vector, post, or base maps for
highly effective displays
- Shading calculations based on several shading methods,
including Simple, Peucker's Approximation, Lambertian Reflection, and
Lommel-Seeliger Law
- Set relief parameters using Central Difference or
Midpoint difference gradient methods
- Specify color for missing data
- Change the rotation and tilt angles.
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