Lumbridge Simulate Engine — the city, and the licence it can actually ship under

LSE is the third of the three, beside lumbridge-compute and lumbridge-bench: a
3D engine for walkable places. This first commit is the outside of the world —
San Francisco — plus the seams the inside will attach to.

The engine renders a City and a list of Markers and knows nothing else. It does
not know markers are usually companies and it will never learn that "rejected"
is red; that mapping lives in an adapter. Which is what lets one renderer serve
a private map, a public one, and a self-hoster with no Lumbridge account, none
of them a fork of the others.

Three things were designed around the licence rather than discovered after it,
because each one is a promise Apache 2.0 makes that is easy to break by
accident. No trademarks in the repo — logos are fetched at runtime, and
public/logos/ is gitignored. No OpenStreetMap-derived coordinates, which is why
every coastline in cities/sf.ts was traced by hand: Nominatim output is ODbL,
share-alike, and would attach to the whole pack. And no FlightRadar24 client —
their terms forbid scraping and redistribution, so flights are an interface
with a simulator and open community ADS-B behind it.

The privacy constraint and the licence constraint turned out to want the same
thing. Geocoded company positions and pipeline status both stay behind Workie's
API; the open repo holds the city and the renderer. The tempting shortcut —
commit an sf-companies.json — breaks both at once.

Ported out of Workie, where a 3D city engine had no business living. Workie's
/live is deleted rather than deprecated.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

NOTICE

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+LSE — Lumbridge Simulate
+Copyright 2026 Lumbridge Corp.
+
+This product includes software developed at Lumbridge Corp.
+Licensed under the Apache License, Version 2.0 (see LICENSE).
+
+
+ORIGIN AND ORIGINALITY
+----------------------
+
+LSE's city view was inspired by the interaction model of two prior works —
+Levels.fyi Atlas, and Nutlope's NYC AI Atlas (https://github.com/Nutlope/
+nyc-ai-atlas), which itself credits Levels.fyi. What was taken is the *idea*:
+a left-hand chapter legend, animated camera flights into map areas, clickable
+place labels, and ambient motion in the scene.
+
+No code, geometry, or asset from either work is present here. LSE's renderer,
+its terrain system, its block-lattice building placement, and every coordinate
+in every city pack were written from scratch. The two projects do not even
+share a subject: the NYC atlas renders hand-traced Manhattan on flat ground,
+and LSE's premise is relief — a city you cannot read without its section.
+
+Stating this plainly matters, because at the time of writing the NYC AI Atlas
+repository carries no LICENSE file. Absent a licence grant, the default is that
+no rights are given, so nothing from it could have been reused even had we
+wanted to. Attribution here is courtesy toward a good idea, not a licence
+obligation.
+
+
+GEOGRAPHIC DATA
+---------------
+
+All geography in src/cities/ is original expression, traced by hand.
+
+It is deliberately NOT derived from OpenStreetMap. OSM data — including
+coordinates returned by Nominatim geocoding — is licensed under the Open
+Database License (ODbL), whose share-alike terms would attach to any derivative
+database and cannot be reconciled with the permissive licence above.
+
+Where real elevation data is used in future, it will come from USGS/SRTM
+sources, which are United States government works in the public domain.
+
+
+TRADEMARKS
+----------
+
+This repository contains no third-party logos, wordmarks, or brand assets.
+
+Organisation logos displayed by applications built on LSE are fetched at
+runtime and are never redistributed as part of this project. All trademarks,
+service marks, and trade names are the property of their respective owners.
+Any use is nominative — to identify the organisation referred to — and does not
+imply affiliation with or endorsement by the trademark holder.
+
+
+THIRD-PARTY DEPENDENCIES
+------------------------
+
+three.js — MIT License — Copyright (c) 2010-2026 three.js authors
+  https://github.com/mrdoob/three.js
+
+Build tooling (Vite, TypeScript, esbuild) is a development dependency only and
+is not redistributed in built output.
+
+
+AIRCRAFT DATA
+-------------
+
+The flight sources shipped in this repository are a simulator (original work)
+and clients for open community ADS-B feeds. No commercial aviation data
+provider's data is included or redistributed, and no client for a provider
+whose terms prohibit such use is present.