April 2013
Beginner to intermediate
672 pages
21h 44m
English
book
Introducing Geographic Information Systems with ArcGIS: A Workbook Approach to Learning GIS, 3rd Edition
by Michael D. Kennedy
Content preview from Introducing Geographic Information Systems with ArcGIS: A Workbook Approach to Learning GIS, 3rd Edition
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Three-Dimensional Entities in a Three-Dimensional Field: Triangles and Multipatches
Triangles are plane, three-sided polygons used in the TIN data model, where each triangle has a calculated maximum slope and a direction (aspect). Further, each point on or within the triangle has a “z” value such as elevation.
Multipatches are the outer surface, or shell, of features that occupy a discrete area or volume in three-dimensional space. For example, a representation of a building (discussed in Chapter 9).
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