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National Center for Geographic Information and Analysis
Unit 31 - Efficient Storage of Lines - Chain Codes
- Author(s): Unit 31, CC in GIS
- Douglas, David H.
- Editor(s): Goodchild, Michael F.
- Kemp, Karen K.
- et al.
This unit considers how the geometry of lines and areas is coded in a GIS database. Different techniques for coding straight lines, arcs of circles, and splines are presented, and advantages and disadvantages of each are discussed.