Credits & Attribution

Zoned is built using open-source software and open data. We gratefully acknowledge the following projects and data sources:

Mapping Libraries

Leaflet

BSD-2-Clause License

An open-source JavaScript library for mobile-friendly interactive maps.

https://leafletjs.com/

Esri Leaflet

Apache-2.0 License

A set of tools for using ArcGIS services with Leaflet.

https://esri.github.io/esri-leaflet/

Turf.js

MIT License

Advanced geospatial analysis for browsers and Node.js.

https://turfjs.org/

React Leaflet

MIT License

React components for Leaflet maps.

https://react-leaflet.js.org/

Leaflet Providers

MIT License

Community basemap providers for Leaflet.

https://leaflet-extras.github.io/leaflet-providers/preview/

Map Tiles & Basemaps

OpenStreetMap

ODbL License

Map data from OpenStreetMap contributors.

https://www.openstreetmap.org/copyright

CartoDB / CARTO

CC BY 3.0

Voyager basemap tiles for clear, readable maps.

https://carto.com/attributions

Esri

Esri Terms of Use

Basemaps and GIS services used for parcel and zoning layers.

https://www.esri.com/en-us/legal/terms/full-master-agreement

Frameworks & Platforms

Next.js

MIT License

React framework for production web applications.

https://nextjs.org/

React

MIT License

User interface library for building interactive web apps.

https://react.dev/

Vercel

Service Platform

Hosting, deployment, and analytics platform.

https://vercel.com/

Data & APIs

Supabase

Apache-2.0 License

Database and authentication platform.

https://supabase.com/

OpenAI

API Service

AI-powered text analysis and summarization.

https://openai.com/

Payments & Messaging

Stripe

Service Platform

Payments infrastructure for online transactions.

https://stripe.com/

Resend

MIT License

Email delivery for transactional messages.

https://resend.com/

Nodemailer

MIT License

Email sending library for Node.js.

https://nodemailer.com/

Data Sources

City of Ottawa Open Data

Open Government Licence - City of Ottawa

Property information, parcel boundaries, building footprints, and zoning data provided by the City of Ottawa's Open Data Portal.

https://open.ottawa.ca/

Ottawa Zoning By-law 2026-50

Public Document

Zoning regulations, setback requirements, and land use definitions are based on Ottawa's official Zoning By-law 2026-50.

Ottawa Zoning By-law

geoOttawa

City of Ottawa

Interactive mapping services and ArcGIS REST services.

https://maps.ottawa.ca/geoottawa/

Additional Tools

PDFKit

MIT License

PDF document generation library for Node.js.

https://pdfkit.org/

This project would not be possible without the contributions of the open-source community and the City of Ottawa's commitment to open data.

Last updated: Jan 2026