Triangulated Irregular Network (TIN) - PowerPoint PPT Presentation

1 / 10
About This Presentation
Title:

Triangulated Irregular Network (TIN)

Description:

Ensures that any point on the surface is as close as possible to a node ... What do TINs Look Like ? TIN in ArcInfo. Arc: TINARC. Usage: TINARC in_tin out_tin ... – PowerPoint PPT presentation

Number of Views:2352
Avg rating:3.0/5.0
Slides: 11
Provided by: garyj157
Category:

less

Transcript and Presenter's Notes

Title: Triangulated Irregular Network (TIN)


1
Triangulated Irregular Network(TIN)
  • A set of adjacent, non-overlapping triangles
    computed from irregularly spaced points with x, y
    coordinates and z values.

2
Surface Concepts
  • Discrete vs. Continuous features
  • Discrete features
  • roads,
  • land ownership,
  • Continuous features
  • elevation,
  • Rainfall data,
  • Pollution concentration

3
What is a TIN ?
  • Tin data structure based on two basic elements to
    form a continuous faceted surface.
  • Points with x,y,z values
  • Series of edges

4
What is a TIN ? (cont.)
  • The triangles are as equi-angular as possible
  • Ensures that any point on the surface is as close
    as possible to a node
  • The triangulation is independent of the order the
    points are processed

5
Components of a TIN
  • Nodes
  • Edges
  • Trangles

6
What is a Lattice ?
  • A surface interpretation of a grid
  • Equally spaced sample points
  • Referenced to a common origin
  • Constant sampling distance in the x and y
    directions

7
What do TINs Look Like ?
8
(No Transcript)
9
TIN in ArcInfo
  • Arc TINARC
  • Usage TINARC ltin_tingt ltout_tingt
    POLY LINE POINT HULL
  • PERCENT DEGREE Z_FACTOR

10
  • END
Write a Comment
User Comments (0)
About PowerShow.com