Vector Data Structure
Vector data represents features as points, lines, and polygons. A point feature is an x and y coordinate, a line is a string of consecutive points, and a polygon is a string of consecutive points that closes back upon itself. Vector data sets can have topology (see section 3.5). Topology means that, in addition to the position of every feature, the software maintains the spatial relationships of adjacency and connectivity between features (i.e., it “knows” where all features are and how the relate to each other).
Benefits of Vector Data Structure
1. Less storage space is needed because many pixels don’t have to be stored for a homogeneous area.
2. Feature types can be individually retrieved such as roads or water features,
3. It is easier to associate a variety of descriptive resource data with a single resource feature.
4. Digitized data does not have to be converted.
5. Vector data set graphics tend to be of a higher quality.