|
|
SPATIAL GLOSSARY
IGES
Initial Graphics Exchange Specification (IGES) is a common data format used
for transfer of CAD data.
Parallax
The apparent angular displacement of an object as seen in an aerial photograph with
respect to a point of reference or coordinate system. Parallax is caused by a difference in
altitude or point of observation.
Raster data
Data that is based on a cellular grid structure composed of rows and columns (a raster).
Each grid cell or pixel is referenced by an "x,y" coordinate and is stored as an identifier to
which additional attributes may be attached. Groups of cells with the same value represent
map features.
Do you need a comprehensive GIS glossary? Here's some pointers to my favorite on-line Glossaries:
 Next Section
Return to Newsletter
Contents
|
Sponsored by:
For information
regarding
advertising rates
Click Here!
|
