18-Geom-B6 Land Use Planning and Environmental Management · May 2014
Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)
National Exams, May 2014 — 04-Geom-B6, Land Use, Planning & Environmental Management. Three hours; closed book (any non-communicating calculator permitted). Format: seven questions of equal value (20 marks each); the paper directs that answering any five (5) of the seven constitutes a complete exam (100%), and the first five as they appear in the answer book are marked. All seven questions are solved in full below so the set serves as a complete study resource. Answers are framed in the Canadian planning context (Statistics Canada’s census-geography definitions; the Canadian Institute of Planners; provincial planning legislation, official community plans and regional growth strategies), consistent with the Engineers Canada / EGBC syllabus for this exam.
Reference texts: G. Hodge & D. Gordon, Planning Canadian Communities: An Introduction to the Principles, Practice and Participants (Nelson, current ed.) — the standard Canadian reference for this exam code; I. McHarg, Design with Nature (1969) — the sieve/overlay method underlying GIS site analysis; J. Garreau, Edge City: Life on the New Frontier (1991); Statistics Canada, Census Dictionary (population centre, census metropolitan area and census agglomeration definitions); Canadian Institute of Planners (CIP) materials; World Commission on Environment and Development, Our Common Future (Brundtland Report, 1987); provincial planning statutes (e.g., Ontario Planning Act, R.S.O. 1990, c. P.13; British Columbia Local Government Act) and representative official community plans / regional growth strategies (Metro Vancouver, the Greater Golden Horseshoe Growth Plan).
Question 4 uses the exam’s terms “urbanized area” and “metropolitan area.” In current Statistics Canada usage the closest official equivalents are the population centre (which replaced the older term “urban area” in 2011) and the census metropolitan area (CMA). The answer uses the official Canadian terms and notes the correspondence, rather than importing the U.S. Census “urbanized area” definition.
Question text not reproduced: the examination questions are © Engineers and Geoscientists BC. Open the official past paper (linked at the top of this page) to read the question, then follow the worked solution below.
Site analysis is the systematic study of a parcel and its context to understand its opportunities and constraints before a plan or design is prepared. It converts raw site data into an informed basis for design, and in the design professions it follows a recognisable sequence of steps.
1. Define the program and study area. Establish what the site is to accommodate (the program) and the boundary and context to be studied, including the surrounding land uses and off-site influences.
2. Inventory the physical environment. Collect and map the natural data: topography and slope, geology and soils, hydrology (watercourses, wetlands, floodplains, drainage), vegetation and habitat, climate/microclimate (sun, wind, shade), and hazard lands. Geomatics supplies much of this — survey control, digital elevation models, orthoimagery and cadastral fabric.
3. Inventory the cultural / built environment. Record legal and human factors: property boundaries and easements, existing structures, zoning and official-plan designations, utilities and servicing, access and circulation, adjacent uses, heritage features, and views.
4. Analyse and interpret — opportunities and constraints. Interpret each factor as an opportunity or a constraint (steep or unstable slopes, wet soils and floodplains, significant habitat and buffers become “no-build” or restricted; well-drained, gently sloping, accessible land becomes developable). This is McHarg’s “design with nature” suitability logic.
5. Composite suitability (overlay/synthesis). Combine the individual factor maps into a composite that identifies the most and least suitable areas for each proposed use — the sieve/overlay analysis.
6. Synthesis into design directives. Translate the analysis into a concept: where to build, what to protect, how to access and service the site — the input to the site plan or design.
How GIS applies. A geographic information system is the natural digital engine for this process. Each site factor is held as a georeferenced thematic layer; GIS lets the analyst (i) capture and integrate survey, remote-sensing and record data in one spatial database; (ii) derive new information — slope, aspect and hillshade from a DEM, distance buffers around streams and roads, watershed and viewshed; (iii) reclassify each layer into suitability classes and, by weighted overlay, combine them into the composite suitability map that McHarg drew by hand with translucent sheets; and (iv) test alternatives and visualise results in 2-D and 3-D for the public and the client. In urban planning GIS thereby supports land-suitability studies, servicing and constraints mapping, and impact assessment; in landscape architecture it supports terrain, drainage, vegetation, viewshed and ecological-connectivity analysis. GIS makes the analysis faster, repeatable, transparent (the weights and rules are explicit) and easily updated as new data arrive — turning site analysis from a static drawing into a queryable decision-support model.
