PLAN105 Lecture Notes - Lecture 19: Scenario Analysis, Hectare, Query Language

• School: University of Waterloo
• Department: Planning
• Course: PLAN105
• Professor: Clarence Woudsma

Document Summary

The set of rules used to create a digital representation of information, in the form of discrete entities and the relationships between them. Gis (spatial) data models: 2 main categories = field class, object class focus on the field class which has two main approaches, raster, vector. Field class based on data layers or themes. Data is organized by layers, coverages or themes, with each theme representing a common feature. Layers are integrates using explicit location on the ea(cid:396)th"s su(cid:396)fa(cid:272)e, thus geog(cid:396)aphi(cid:272) lo(cid:272)atio(cid:374) is the organizing principal. Dem digital elevation model provides 3-d representation shape of earth: lidar light detection and ranging laser based height acquisition. La(cid:455)e(cid:396)s a(cid:396)e i(cid:374)teg(cid:396)ated usi(cid:374)g e(cid:454)pli(cid:272)it lo(cid:272)atio(cid:374) o(cid:374) the ea(cid:396)th"s su(cid:396)fa(cid:272)e, thus geog(cid:396)aphi(cid:272) lo(cid:272)atio(cid:374) is the organizing principal. The spatial component of a layer in the field class may be represented in two ways: In vector format as point and lines and areas (pla model) Area is covered by grid with (usually) equal-sized cells.