Earthsys 144: Fundamentals of GIScience
Spatial & Cartographic Data Models
where is your data? gis.stanford.edu
Cartographic Model
cartographic models
cartographic models
map layers
titles
metadata
zones
values
labels
locations
coordinates
locations across layers
spatial data models
layers
vector & raster
vector data model
entities & (spatial) objects
vector data structure
vector representations
representing complex entities
representing complex entities
(con't)
How long is the coast of Britain?
The problem of generalization
topology
topology
topological rules
topology
attribute data
attribute data
nominal data
ordinal attributes
interval/ratio attributes
raster data model
raster data models
cells
cells
cells
cells
null
"Raster is faster, but vector is correcter"
-Ron Briggs UTDallas
comparisons & conversions
vector vs raster
conversion
other spatial data models
3-dimensional models
3-dimensional models
object-oriented models
multiple models
