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Half-day ‘Mapping from Home’ virtual event: June 10, 2020
Abstracts and Presentations
National-scale flood risk assessment: GIS-based flood hazards exposure and vulnerability mapping at the census tract level across Canada
Liton Chakraborty, Andrea Minano, Jason Thistlethwaite, Daniel Scott, Daniel Henstra ; University of Waterloo / CAG-GIS
This study assesses social vulnerability to flood hazard exposure at the census tract (CT) level across Canada. Following the Cutter’s hazard-of-place model approach, geographical information system (GIS)-based bivariate choropleth maps reveal the hotspots of flood risk at the CT level. Flood exposure analysis captures the percent of residential properties in a CT exposed to any of the fluvial, pluvial, and coastal flood hazards at the 100-year flood recurrence interval.
The findings highlight the spatial patterns of social vulnerability to flood hazard, which critically helps policymakers identify geographic flood disadvantaged groups of communities in Canada.
Short Introduction to Creating Shaded Relief with Blender
Morgan Hite, Hesperus Arts, Smithers, BC / CCA
Although shaded relief for mountain ranges was originally hand drawn by artists, we now have tools for creating our own digital hillshades in software such as QGIS and ArcGIS. However, the free animation software Blender is another exciting tool for creating shaded relief.
Although designed to create animation sequences for film, Blender has a plugin (BlenderGIS) which allows the software to read a DEM, position light sources and shoot a single frame from overhead. Blender’s light-bounce algorithms, adjustable light-sources, and surface materials give delicious results, but the software initially appears quite intimidating.
I will demonstrate the basic method to produce hillshades in Blender, note the typical pitfalls, and the features a creative cartographer could go on to explore.
French Cartography West of Lake Superior in Relation to the Seven Years War
David Malaher, Centre for Rupert’s Land Studies, University of Winnipeg / ACMLA
This presentation featured four maps by three French cartographers (Bellin, Danville and Bonne) which were issued between 1743 and 1757 to help their fur-traders cross the 450 km pre-Cambrian territory between Lake Superior and the western prairies.
These maps were based on regional sketches by Pierre de La Verendrye and his Indigenous guide Auchagah, and sent to Quebec around 1730 from where they were forwarded to Le Depot de La Marine in Paris. Englishman John Mitchell copied their western information onto his map of 1755 claiming British rights in the northwest prior to the war of 1756-1763.
[Presentation slides not provided … ]