breakline
See Also: structure line
[3D GIS] A line in a TIN that represents a distinct interruption in the slope of a surface, such as a ridge, road, or stream.
Breakline - A line with a series of vertices that defines points of inflection in the topographic surface of the earth (i.e., places where there are sharp changes in the direction of slope on the earth's surface).
Breakline A line that defines and controls the surface behavior of a triangulated irregular network (TIN) in terms of smoothness and continuity. Physical examples of breaklines are ridge lines, streams, and lake shorelines.
Breakline
A graphic defining a sharp contrast change in the slope of the land. e.g. embankment.
Breakpoint ...
breakline
A line in a TIN that represents a distinct interruption in the slope of a surface, such as a ridge, road, or stream. No triangle in a TIN may cross a breakline (in other words, breaklines are enforced as triangle edges).
breakline A linear feature that defines and controls the surface behavior of a tin in terms of smoothness and continuity. Breaklines are always maintained as linear features in a tin.
The TIN surface you just created is displayed with its faces shaded by elevation and it shows its hard edges -- those which were forced by stipulating that the streams and contours should be treated as Hard Breaklines.
Producing a TIN from vector hypsographic data without breaklines can have an effect upon the formation of the triangles that compose the TIN. Drains do not form sharp patterns in the valley and tend to be smoother.
o Breakline: tell a distinct change; hard breakline capture abrupt changes in a surface, soft breakline do not affect the shape of the surface
o Replace, clip, erase, fill polygons
- Create 3D-feature
o convert 2D to 3D or ...
Add the pf_tin (TIN Data Source, on the CD in the packgis\cfr250 directory). The Pf_tin layer will load with random-colored breaklines, but with a green > red > white elevation fill legend. Zoom into the area shown by the red box below.
Natural neighbor technique (interpolating a surface from points)
Spline
Topo to Raster interpolation (topologically correct surface generation)
Trend interpolation
TIN creation using vector features (includes hard or soft breaklines, mass points, ...
 See also: Surface, Feature, GIS, Information, Geographic
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