GIS analyst & spatial developer

Mapping data
into insight

I work at the intersection of geography, data, and code — building spatial tools, visualizations, and analyses that make complex environments legible.

43.8561° N, 79.3370° W

Background

I'm a GIS analyst and spatial developer based in Markham. My work spans environmental analysis, urban planning, and data engineering — using tools like ArcGIS, QGIS, Python, and PostGIS to turn raw geographic data into actionable insights.


Outside of GIS, I'm interested in web mapping, open data, and building tools that make spatial analysis more accessible. This site is a living portfolio — new projects and writing get added regularly.

12+
GIS projects
4
years experience
8
tools & languages
3
domains covered

GIS Projects

spatial analysis
Urban Heat Island Mapping

Analyzed land surface temperature data across the city using Landsat imagery to identify heat island zones and correlate with green cover.

ArcGIS Landsat Python
web mapping
Transit Accessibility Dashboard

Interactive Leaflet.js map visualizing walking distance to transit stops, with isochrone overlays by neighbourhood income bracket.

Leaflet.js GTFS PostGIS
data engineering
Watershed Delineation Pipeline

Automated DEM processing pipeline in Python to delineate sub-watersheds and calculate flow accumulation for regional hydrological modelling.

QGIS GDAL Whitebox
remote sensing
Forest Change Detection

Multi-temporal NDVI analysis using Sentinel-2 to detect deforestation and regrowth patterns over a 5-year period.

Sentinel-2 Google Earth Engine
coming soon
Your next project

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Skills & tech

GIS platforms
ArcGIS Pro
QGIS
Google Earth Engine
Languages
Python
SQL / PostGIS
JavaScript
Web & data
Leaflet.js
GeoPandas / GDAL
Mapbox GL
Analysis domains
Remote sensing
Urban / planning
Hydrology

Download CV

Evan Chua — GIS Analyst

Last updated April 2026 · PDF · 1 page

↓ download resume

Notes & articles

Get in touch

Open to freelance projects, full-time roles, and collaborations. Feel free to reach out if you're working on something interesting in the GIS, spatial data, or environmental space.