# Credits and source terms

Research reviewed September 20, 2026. Source acquisition and revision dates vary.

| Material | Credit and terms |
|---|---|
| Building geometry, native Exchange textures, roads, water, parks, woodland outlines and public-tree points | City of Mississauga. The [archived item-linked Terms of Use](../research/City-of-Mississauga-Open-Data-Terms.pdf) accompany this package. [Original item-linked terms](https://mississauga.maps.arcgis.com/sharing/rest/content/items/961c790805c14d8da258ec91bf4117e3/data). |
| Bare-earth terrain | Ontario LiDAR-derived Digital Terrain Model. **Contains information licensed under the Open Government Licence – Ontario.** [Licence](https://www.ontario.ca/page/open-government-licence-ontario), [dataset](https://data.ontario.ca/en/dataset/ontario-digital-terrain-model-lidar-derived). |
| Mapped LRT track alignment, mapped beach and Pearson airfield context | **© OpenStreetMap contributors, ODbL 1.0.** [Attribution information](https://www.openstreetmap.org/copyright), [Open Database Licence](https://opendatacommons.org/licenses/odbl/1-0/). The extracted track and airfield data retain this licence. The airfield includes five runway references and partial apron/taxiway coverage, with disclosed display widths; neither layer is an engineering survey. |
| Interactive 3D renderer | Three.js 0.186.0, Copyright © 2010–2026 three.js authors, MIT. [Full supplied notice](three-0.186.0-MIT.txt), [upstream](https://github.com/mrdoob/three.js). Includes the supplied controls, loader and utilities. |
| Compressed-model decoder | meshoptimizer 1.2.0, Copyright © 2016–2026 Arseny Kapoulkine, MIT. [Full supplied notice](meshoptimizer-1.2.0-MIT.txt), [upstream](https://github.com/zeux/meshoptimizer). |
| Planning-derived and schematic building additions, source facades and research evidence | Respective developers, architects, public authorities and publications are credited in the model metadata and project register. Inclusion as a cited reference is not a blanket licence to republish their original artwork or documents. |

The City dataset terms allow redistribution in original or modified form subject to their conditions; keep the terms with the data or link them. The City credit does not imply participation or endorsement. The Ontario statement and OSM attribution should travel with derived images, exports and datasets. When publishing printed images that use OSM data, include a readable attribution and the copyright-page URL.

The MIT permission and copyright notices above must accompany redistributed copies or substantial portions of the relevant software. They are copied without modification from the installed packages. Their corresponding shipped Three.js modules and meshoptimizer decoder were checked against those package files.

Blender was used to render the pictures and prepare editable scenes. The Blender application is not included in this package. Stephen Velasco’s public work was reviewed as a visual reference; his model files and artwork are not included. The private correspondence review is a separate local research document and is not part of the public website. This is an independent project for Daniel Sultan, with no endorsement by the City, Ontario, Metrolinx or Stephen Velasco.

Refinement scenery includes City pier and dock outlines, mapped street details and historical bus-shelter footprints. Rails and selected station platforms follow mapped footprints; trains and canopies are illustrative. Individual supplemental models retain source dates, registration assumptions and attribution in their manifests and embedded metadata.