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7 Cards in this Set
- Front
- Back
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shapefile
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standard nontopological data format used in ESRI products. No files describe spatial relationships between points lines and polygons.
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TIN
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Triangulated Irregular Network. approximates terrain with a set of non- overlapping triangles
• Point features are elevation values with x, y, and z values. • x, y = location, z = elevation • elevation points come from variety of sources (stereo aerial photographs, survey data, DEM) |
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Delaunay triangulation
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iterative process of connecting points with their two nearest neighbors to form triangles that are as equiangular as possible (used in TIN). Results in:
• Triangles (faces) • Points (nodes) • Lines (edges) |
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Region
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Geographic area with similar characteristics.
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Route
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linear feature such as a highway, bike path, or stream but has measurement system.
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Events
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linear attributes, must be associated with routes so they can be displayed and analyzed with other spatial features
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Section
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refers directly to lines (arcs) in a line coverage and positions along lines.
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