Raster better when: - ANSWER Continuous data, easy overlay, and storing,
analyzing, and manipulating image data
Vector better when: - ANSWER Smaller data size, representing networks or
discrete entities, better categraphically, calculating or storing topological info
GIS main spatial data models - ANSWER Raster, vector, an TIN
Vector types - ANSWER Line, polygon, point
Geodesy - ANSWER The science of measuring the shape and gravity of the
earth
Datum - ANSWER Reference surface or co-ord surface approximating the
earth
Datum Parameters - ANSWER Geometric parameters describing the surface
world
Map Projections - ANSWER Transformation of co-ord locations from earth's
surface onto flat maps
Coordinate Systems - ANSWER System that enables locations to be specified
by a set of numbers
Coordinates - ANSWER Set of numbers that unambiguously define a location
Three important problems - ANSWER Earth is not flat but we often think like
it is
The earth's surface is irregularly shaped and deviates from the mathematical
surface
Measurements of the earth's shape and our location are both inaccurate
analyzing, and manipulating image data
Vector better when: - ANSWER Smaller data size, representing networks or
discrete entities, better categraphically, calculating or storing topological info
GIS main spatial data models - ANSWER Raster, vector, an TIN
Vector types - ANSWER Line, polygon, point
Geodesy - ANSWER The science of measuring the shape and gravity of the
earth
Datum - ANSWER Reference surface or co-ord surface approximating the
earth
Datum Parameters - ANSWER Geometric parameters describing the surface
world
Map Projections - ANSWER Transformation of co-ord locations from earth's
surface onto flat maps
Coordinate Systems - ANSWER System that enables locations to be specified
by a set of numbers
Coordinates - ANSWER Set of numbers that unambiguously define a location
Three important problems - ANSWER Earth is not flat but we often think like
it is
The earth's surface is irregularly shaped and deviates from the mathematical
surface
Measurements of the earth's shape and our location are both inaccurate
