# Detroit hero geography Prepared 2026-10-17. This is a stylized, geographically grounded downtown model, not a survey or a claim that futuristic flights/deliveries currently operate here. ## Coordinates and geometry - Origin: latitude `42.332`, longitude `-83.047` (WGS84). - Local meters: `x = (longitude + 83.047) * 111320 * cos(42.332°)`; `z = (42.332 - latitude) * 111320`. `y` is height above a flat local ground plane. - Extent: longitude `-83.058` to `-83.032`, latitude `42.321` to `42.343`. - Building rings retain actual footprints and optional courtyards (`holes`). Coordinates are rounded to centimeters and nearly collinear points are simplified. - Street polylines are actual centerlines. Widths are illustrative estimates, not surveyed lane counts. Tunnel segments are omitted from the above-ground scene. - The river polygon follows the actual Detroit bank; its other boundaries are the artificial scene crop. Do not treat the southern crop edge as the Windsor bank. - The most recent Hudson's Detroit footprints replace the older combined parcel. The building's stepped sections are separate, overlapping solids, not separate towers. - One Detroit Center, Comerica Tower, and Ally Detroit Center name the same building. ## Data license and complete download All mapped geographic geometry in this release is derived from OpenStreetMap: © [OpenStreetMap contributors](https://www.openstreetmap.org/copyright), licensed under the [Open Database License 1.0 (ODbL)](https://opendatacommons.org/licenses/odbl/1-0/). [Download the complete derived geographic database](./geography.json). This machine-readable JSON includes every mapped feature used by the scene, its local projection and transformation notes. It is freely available under ODbL, including for commercial reuse subject to that license. Preserve attribution and applicable share-alike obligations when redistributing or adapting the database. Scene code, original architectural stylization, vehicles, textures and illustrative background masses are separate works; their own source/license records apply. ### Downtown buildings and streets Retrieved **2026-10-17**, directly from two bounded OpenStreetMap API extracts: - [Western downtown extract](https://api.openstreetmap.org/api/0.6/map?bbox=-83.058,42.325,-83.045,42.343) - [Eastern downtown extract](https://api.openstreetmap.org/api/0.6/map?bbox=-83.045,42.325,-83.032,42.343) - Complete boundary relations [8644491](https://www.openstreetmap.org/relation/8644491) and [11111132](https://www.openstreetmap.org/relation/11111132) resolve members extending beyond those bounded extracts. The downtown collection contains **709 building/building-part footprints** and **1,326 road/carriageway/service-road/pedestrian/cycleway centerlines**. Feature records retain OSM identifiers. Building multipolygon outer rings and courtyard holes are assembled from their member ways. Ordinary building envelopes use 55 explicit mapped heights, 308 mapped story counts converted at an illustrative 3.7 m/story, and 318 clearly labeled two-story fallbacks where height is unmapped. Twenty named skyline buildings retain documented architectural-height overrides; eight Hudson's Detroit parts retain their mapped stepped composition. This is not a survey of roof heights or building interiors. Building rings are simplified at approximately 0.35 m; downtown road lines at 0.5 m. Coordinates are projected and rounded to centimeters. Streets are clipped to the scene bounds. Widths use mapped width/lanes where available, otherwise explicit illustrative class-based estimates. Divided streets retain separate carriageways rather than applying a full two-way road width twice. Tunnels, indoor corridors, bridges, parking aisles and driveways are omitted from this core ground-level road layer. The MacArthur Bridge is modeled separately. All 21 named landmark identities remain. Their anchors now follow OSM geometry: most moved less than 7 m from the earlier preview; Ford Field and Book Cadillac moved approximately 19 m. The municipal landmark now anchors the separately mapped courts tower rather than a combined two-tower footprint (approximately 51 m difference). The administration tower remains a separate mapped building. Facade colors, night lighting, decorative crowns, roof equipment and foliage are artistic interpretations, not GIS attributes or live operating information. ### River, parks, and Hudson's Detroit - [Detroit River relation 5678328](https://www.openstreetmap.org/relation/5678328), Detroit shoreline [way 30353979](https://www.openstreetmap.org/way/30353979). - Hudson's Detroit [tower 1105871812](https://www.openstreetmap.org/way/1105871812), [block 1105871813](https://www.openstreetmap.org/way/1105871813), and tower tier ways `1565621013` through `1565621018`. - Hart Plaza and riverfront parks from the same bounded OpenStreetMap extracts. Keep visible OpenStreetMap attribution with any public interactive scene using this database. Retain this source record with redistributed data. ## Landmark and aircraft visual references - [Visit Detroit landmarks](https://visitdetroit.com/inside-the-d/iconic-landmarks/): Renaissance Center's seven-tower riverfront composition. - [Guardian Building owner history](https://www.guardianbuilding.com/history): tangerine brick, granite base, a taller north tower and smaller south tower joined by a cathedral-like central block, polychrome upper-story ornament. - [Book Tower owner history](https://www.booktowerdetroit.com/about/history/): 38-story Renaissance-inspired limestone tower with ornate cornices/caryatids. - [Book Tower, Detroit Historical Society](https://www.detroithistorical.org/learn/online-research/encyclopedia-of-detroit/book-tower): 475-foot height, used as the approximate 144.78 m skyline height. - [Penobscot, Detroit Historical Society](https://www.detroithistorical.org/learn/online-research/encyclopedia-of-detroit/penobscot-building): 565-foot limestone/granite Art Deco tower; antenna and beacon are separate details. - [Ally Detroit Center, Council on Tall Buildings and Urban Habitat](https://www.skyscrapercenter.com/building/one-detroit-center/2020): 188.7 m / 43 stories and historical aliases. - [Hudson's Detroit, owner](https://www.bedrockdetroit.com/property/hudsons-detroit): 685-foot tower and 12-story block separated by a pedestrian plaza. - [Amazon Prime Air aircraft photos](https://www.aboutamazon.com/news/transportation/amazon-prime-air-drone-delivery-mk30-photos) and [current MK30 technology page](https://www.primeair.amazon/technology): visual reference for the light-gray/blue hybrid wing/rotor delivery aircraft. Aircraft packages are carried internally. Actual MK30 deliveries descend to about 13 feet without landing; downtown routes in this scene are fictional. No photographs or provider logos are embedded by this geographic data file. ## Expanded Detroit–Windsor / Belle Isle geography (2026-10-17) `region` extends the downtown core. Its existing OSM records are unchanged by the downtown-source replacement. The renderer now uses **both real riverbanks**, rather than interpreting the legacy `river` crop edge as Canada. The full [Detroit River OSM relation 5678328](https://www.openstreetmap.org/relation/5678328) was assembled from connected outer ways; island inner rings remain holes in the water mesh. Coordinates use the same local-meter projection above. Simplification is approximately 4 m on the river and 3 m on Belle Isle's outline. - Belle Isle: 159-vertex main island outline, 16 mapped inland water bodies, 70 mapped building footprints, 12 small mapped woodland patches, plus actual road/service-road/park-path geometry. Its footprint bounds are x 3454.8–7731.53 m, z -2204.04–-109.14 m. - Windsor: 299 OSM building/building-part footprints, including the different Caesars Forum and Augustus towers; 13 park outlines. The combined regional street/path dataset contains 655 ways. Building levels are converted using an illustrative 3.7 m/story when no mapped height exists; missing levels use 2 stories. Facades, roof equipment and plantings are representative, not a survey. - Caesars Augustus: 111 m / 27 floors, checked against the [Council on Vertical Urbanism / Skyscraper Center](https://www.skyscrapercenter.com/building/caesars-windsor-augustus-tower/10547). Forum is modeled at approximately 83 m, consistent with the [same council's Windsor inventory](https://www.skyscrapercenter.com/city/windsor). - [MacArthur Bridge deck way 800430182](https://www.openstreetmap.org/way/800430182): opposing deck-cap midpoints project to mainland `[3818.24, -1485.94]` and island `[4157.28, -874.59]`. Centerline distance 699.069 m; yaw 0.5063496 radians. This is the Belle Isle access bridge, **not** a Canada border crossing. The GLB's arch/deck elevations are architectural approximations; its 50 m approach ramps go beyond those cap points. No ground-level regional road is drawn across the elevated bridge span. - The [Michigan DNR Belle Isle mobility study](https://www.michigan.gov/dnr/-/media/Project/Websites/dnr/Documents/PRD/BI-archive/Belle-multimodal/BelleIsleMobilityStudy2024-Ch2-Existing-Conditions.pdf) verifies bridge/park connections and pedestrian-light character. The [DNR park page](https://www.michigan.gov/recsearch/parks/belleisle) identifies Belle Isle as an island park, not part of Windsor. - [City of Windsor riverfront documentation](https://www.citywindsor.ca/residents/parks-and-forestry/trails/Riverfront) informs the continuous parkland/promenade character. Shore-side green strips, tree placements and light-pool positions are artistic approximations. - RenCen low podium, Wintergarden and service-core footprints come from OSM building relation [17928873](https://www.openstreetmap.org/relation/17928873), including round-roof Wintergarden part [419447156](https://www.openstreetmap.org/way/419447156). Its barrel-vault structure follows the project's structural contractor, [Novum Structures](https://novumstructures.com/novum_projects/gm-hq-the-wintergarden/), and [Hines' renovation description](https://www.hines.com/properties/gm-renaissance-center-detroit). OSM API extracts were requested only for bounded downtown/Windsor/bridge/island areas and the named river relation. All derived OSM features remain © OpenStreetMap contributors, ODbL; keep visible attribution. Distant unnamed background masses outside the mapped core/Canadian center remain explicitly illustrative. No border, transport, traffic-rule or navigational accuracy is promised.