The
well known models for storing Geo data are:
1. Raster Data model:
ü Raster
data- an array of Cells.
ü Each
cell value represents an attribute.
ü Meta
data stored in File header includes cell size, the number of rows and
columns.
ü Manly
used for Analytical applications like modeling, map algebra and
clustering..
2.
Vector Data model:
ü Representation
of discrete object as points, lines and polygons.
ü Spatial
analyses are done using this model for decision making.
3. Network Model:
ü Special type of
topological feature model.
ü Allows modeling
of flow and transport of resources and services.
ü Defines
how lines are connected to each other.
ü The
rules are stored in Connectivity table.
ü Everyday
application uses this model usually.
4. TIN Data model:
ü Triangulated Irregular Network -TIN
ü Mainly
used to create and represent Surfaces.
ü Surfaces
are represented as non-overlapping triangles constructed from irregularly
spaced points.
ü Easy calculation of
elevation, slope and line-of –sight between points
