Geospatial
PgCert Applied Digital Geography and GIS / Select Projects
Applications / Esri | Adobe Suite CC | Microsoft Office Suite
Municipal GIS Business Case Report
Port Lands Program Watershed Planning / PDF
Municipal Professional, Assignment
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Business case report to implement a web GIS app for the Port Lands Flood Protection Program.
Lake Contamination Geovisualization
Map Algebra, Workshop
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Kriging interpolation model of Copper contamination sample points from Lake Erie’s lake-bed sediment.
Copper TEL + PEL values used to define contamination intervals.
Vector files rasterized, overlaid onto Erie’s DEM for contours and bathymetry with Cu contamination. Exponential semi-variogram model for data distribution, over Spherical and Gaussian − most accurate interpolation (best error stats) of three. Data provided by instructor on contamination thresholds and original contamination data points. The interpolation results led to no values above 87.53µg/g. With PEL of 196.6µg/g, the model shows Cu contamination levels not exceeding a level where adverse effects are expected to occur frequently.
Concepts: Kriging interpolation, Variogram model selection + comparison (based on error stats [mean, RMS, ASE, SRMSPE] for models [Gaussian, Spherical + Exponential]), Reclassification, Vector clip, 3D visualization in Esri ArcScene (DEM layer as custom surface, 3D Effects, fly-through video export)
Urban Tree Planting Suitability
Company Contract Case Study / PDF
Map Algebra, Assignment
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Isolated six neighborhood census tracts to create the study area within Toronto, Ontario. Then generated maps identifying areas suitable for tree planting based on several criteria.
Criteria: physical and legal restrictions of the area + analysis outputs provided from the digital elevation model.
Data Used:
Raster: Land Use (0.6m res), Digital Elevation Model (6.0m res)
Vector: Neighbourhoods, Water Linear Features, Water Area Features, Structure Area Features, Property Boundaries Linear Features
Concepts: Re-projecting, Buffering vector data, Vector to raster conversions, Reclassification, Raster overlay, Surface analysis
Raster Network Analysis
Map Algebra, Workshop
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Combined Geobase digital elevation models (DEM) to generate impedance (cost/friction) values based on physical geographic criteria. Created ‘least cost pathway’ from impedance values. Workshop works to practice solutions for planning, such as for road infrastructure.
Physical geographic guidelines include: Path not to cross Wetlands, Path not to cross Lakes, Minimize path crossing (and running adjacent to) Rivers, Favour lower Slope, and Favour Bridges.
Concepts: Re-projecting, Buffering vector data, Vector to raster conversions, Reclassification, Raster overlay, Surface analysis, Cost backlink raster, Cost path generation
Isolated Land Cover
Map Algebra, Assignment
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Defined two study areas in Toronto, Ontario were studied. Involved the conversion of provided data sets from vector to a 2mx2m spatial resolution raster – the raster’s were then isolated for each region to display the raster composition of land cover composition.
Concepts:
Creation of shapefiles, Selection of records by attribute, Vector to raster conversion, Reclassification, Overlay using raster calculator
Digital Elevation Models
Surface + Visibility Analysis / PDF
Map Algebra, Workshop
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Combined Geobase digital elevation models (DEM) to model for the location’s surface and visibility.
This included; slope, aspect, hillshading and viewshed generation. Specific to the resulting maps, each overlaid specific raster surface analysis outputs to create aesthetically accurate maps based on terrain, aside observer positioning (for viewshed context).
Concepts: Mosaic to new raster, Reclassification, Raster overlay, Visibility analysis (viewshed), Raster surface analysis tools including: Slope [percent rise/degree] Aspect, HillShade, and Contour
Census Tract Buffer
Business Decision, Assignment
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Geocoded and mapped local Toronto shopping centres larger than 600,000 sqft to define major competitor’s proximity to Yorkdale Shopping Centre study location.
The project was self guided, manually geocoded a current data set containing details about each shopping centre’s information. Buffers of 10km and 20km were made on the Yorkdale Shopping Centre Mall centroid to capture census tracts.
Concepts: Re-projecting, Buffering vector data, Selection by overlay, Geocoding and vector creation