Sebastien Tremblay-Johnston
Web Developer at sparkgeo
Vancouver, British Columbia, Canada
Summary
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RockstarSebastien Tremblay-Johnston is a web developer based in Vancouver with 11 years of experience building backend systems and geospatial tooling. He contributes to notable open-source projects, including adding robust Rational Polynomial Coefficients (RPC) support to the widely used rasterio library—bringing advanced georeferencing and GDAL-based coordinate transforms into production-ready code. Practical and hands-on, he pairs backend engineering with testing, documentation, and example-driven integrations that make complex spatial functionality accessible. Despite a self-deprecating GitHub bio, his work demonstrates deep domain expertise in geospatial data processing and a knack for shipping reliable, well-documented solutions.
11 years of coding experience
Github Skills (7)
gdal10
coordinate-transformation10
gis10
python10
raster10
cython10
testing9
Programming languages (10)
Github contributions (5)
rasterio/rasterio
May 2020 - Apr 2022
Rasterio reads and writes geospatial raster datasets
Role in this project:
Back-end Developer
Back-end DeveloperContributions:3 reviews, 21 commits, 25 PRs in 1 year 11 months
Contributions summary:Sebastien contributed to the `rasterio/rasterio` repository by implementing and refining support for Rational Polynomial Coefficients (RPCs) in geospatial raster datasets. Their work involved adding new classes, methods, and properties for handling RPC metadata, along with implementing coordinate transformations using GDAL's RPC functionality. The user also added testing, documentation, and examples for integrating RPCs into the rasterio library, significantly expanding its capabilities in handling complex georeferencing.
rasteriopythongeospatialmapbox-satellite-ossraster
underchemist/rasterio
Oct 2019 - Sep 2024
Rasterio reads and writes geospatial raster datasets
Contributions:3 PRs, 306 pushes, 38 branches in 4 years 11 months
rasteriogeospatialrastergdaldatasets
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