GIS CHPT 3

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Author:
jess3c
ID:
15980
Filename:
GIS CHPT 3
Updated:
2010-04-24 16:56:51
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Vocabulary
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Description:
Vocabulary
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  1. Arc
    A line connected to two end points.
  2. Area
    A spatial feature that is represented by a series of lines and has the geometric properties of size and perimeter. Also called polygon, face, or zone.
  3. Area definition
    A topological relationship used in ESRI's coverage model, which stipulates that an area is defined by a series of connected arcs.
  4. Connectivity
    A topological relationship used in ESRI's coverage model, which stipulates that arcs connect to each other at nodes.
  5. Contiguity
    A topological vector data format used in ESRI products.
  6. Coverage
    A topological vector data format used in ESRI products.
  7. Delaunay triangulation
    A iterative process of connecting points with their two nearest neighbors to form triangles as equiangular as possible in a triangulated irregular network (TIN).
  8. Event
    An attribute that can be associated and displayed with a route.
  9. Georelational data model
    A GIS data model that stores spatial data and attribute data in two separate but related file systems.
  10. Graph theory
    A subfield of mathematics that uses diagrams or graphs to study the arrangements of objects and the relationships between objects.
  11. Line
    A spatial feature that is represented by a series of points and has the geometric properities of location and length. Also called arc, edge, link, or chain.
  12. Node
    The beginning or end point of a line.
  13. Point
    A spatial feature that is represented by a pair of coordinates and has only the geometric property of location. Also called node or vertex.
  14. Route
    A linear feature that allows linear measures to be used on a projected coordinate system.
  15. Section
    A part of a route that refers directly to the underlying arcs and positions along arcs.
  16. Shapefile
    A nontopological vector data format used in ESRI products.
  17. Topology
    A subfield of mathematics that studies properties of geometric objects, which remain invariant under certain transformations such as bending or stretching.
  18. Triangulated irregualar network (TIN)
    A vector data model that approximates the terrain with a set of nonoverlapping triangles.
  19. Vector data model
    A data model that uses points and their x, y-coordinates to construct spatial features.

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