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Santiago's A.T. Field: Visualizing Urban Accessibility through an Evangelion-Inspired Interface

Eduardo Graells-Garrido, Ignacio Pérez-Messina, Claudio Gaete

arXiv:2610.02562v1cs.HC

TL;DR

The paper asks how a science-fiction diagnostic interface can be rebuilt around a real urban problem. It translates Evangelion’s interface into an E2SFCA-based accessibility field for Santiago, then identifies tensions and costs that may transfer to similar work.

  • Problem

    The paper asks what must be modified to make a fictional diagnostic visualization operate on a real analytical problem.

    Source: §1 · p. 1

  • Method

    The authors translate an Evangelion interface into an accessibility field for Santiago, extending E2SFCA with residence–work demand and tying the scan’s elements to model quantities.

    Source: §1 · p. 1, §3 · p. 2, §4 · p. 2

  • Results

    The translation produces a computed Santiago accessibility field and a progressive scan that exposes how its reachability index is assembled.

    Source: §3 · p. 2, §4 · p. 2

  • Takeaways & Limitations

    The authors identify the tensions and costs of operationalizing a science-fiction interface as lessons that transfer to other attempts of this kind.

    Source: §8 · p. 3

    Emergency aesthetics can make inequality immediate but can also cast urban populations as threats, a tension the authors have not resolved.

    Source: §6 · p. 3

Abstract

from arXiv · show

Science-fiction interfaces are often reproduced for their appearance, and their diagnostic logic is rarely rebuilt around real data. Here we describe Santiago's A.T. Field, an interactive visualization of urban accessibility built from a diagnostic interface in Episode 13 of Neon Genesis Evangelion. We translated that interface in five stages: phenomenon, field, progression, interface, and response. A microscopic Angel became a relational urban problem, and a fictional scanning lattice became an accessibility field computed with the E2SFCA method. Every element of the fictional display is tied to a quantity of the model. Three tensions appeared when we made the fictional language operational: the saturated palette of the genre against color-vision deficiency, the motion of the genre against the reduced-motion preference, and the per-frame cost of the animation. The urgency of the fictional command center has its own cost, because emergency aesthetics can cast urban populations as threats. These three tensions are what the translation cost, and they are what transfers to other attempts of this kind.

1 PREFACE

The paper turns an Evangelion diagnostic interface into a visualization for a real analytical problem. It describes the translation as a five-stage process and places it in dialogue with science-fiction interface and accessibility research.

1 PREFACE

  • The paper asks what must change for an Evangelion diagnostic interface to operate on a real problem, using constructive translation to rebuild it around a new analytical object.The work responds to SciFi-VIS’s invitation to examine the two-way relation between science fiction and visualization.Source: §1 · p. 1
  • The translation is organized into five stages, followed by a final section on its costs.The interactive system is available.Source: §1 · p. 1
  • Prior research has surveyed fictional interaction, treated fictional devices as technology prototypes, and used fiction’s superpowers to characterize and inspire visualization systems [18].Planning research has also reviewed accessibility instruments for practitioners.Source: §1 · p. 1
  • The authors found no study of Evangelion’s interfaces and adapt its aesthetics to an accessibility instrument for Santiago, in a manner they compare to local adaptation of manga aesthetics in Latin America.Studies of Evangelion had analyzed its visual style.Source: §1 · p. 1

2 PHENOMENON

The episode presents Ireul as a spreading entity whose distributed behavior becomes visible through a scanning lattice. The paper translates that phenomenon into urban accessibility, a system-wide relation among people, services, and movement.

2 PHENOMENON

  • Ireul, the 11th Angel, appears as corrosion that spreads and resists removal, with its distributed behavior revealed through an interface as it grows across a hexagonal lattice.The episode’s technicians initially identify it as an Angel.Source: §2 · p. 1
  • The paper maps this phenomenon to Santiago’s urban accessibility as a distributed relation among people, services, and movement.Unlike Ireul, a hostile entity, accessibility describes real inhabitants’ opportunities and exclusions.Source: §2 · p. 1

3 FIELD

Santiago’s A.T. Field computes accessibility across a hexagonal grid, extending E2SFCA to account for both residents and workers. Its name and visual form adapt the fictional field while changing what that field represents.

3 FIELD

  • Santiago is tessellated into 9,025 hexagonal cells of 0.09 km2 using the H3 grid at resolution 9.Source: §3 · p. 1
  • The scan advances over the city and activates services and spatial relations that build the accessibility index.The caption shows an intermediate state of the field.Source: Figure 2 · p. 2
  • The E2SFCA method gives each service a supply-to-demand ratio within a distance-weighted catchment, then sums reachable service ratios for each cell.The prototype models walking access to pharmacies, supermarkets, banks, and health services.Source: §3 · p. 2
  • The implementation makes each cell’s demand its residents plus α times its workers, with α offered at 0, 0.25, 0.5, or 1; the data do not determine the right value.The interface opens at α = 0.5, and the resulting index is called commuter-adjusted accessibility.Source: §3 · p. 2
  • The field uses the same hexagonal form as the fictional display, but stands for Accesibilidad y Trabajo—accessibility and work—rather than a barrier against hostile contact.Selecting a cell shows what residents can reach from home and from their workplaces, so its value depends on the rest of the city.Source: §3 · p. 2

4 PROGRESSION

The progressive scan makes the construction of the accessibility index visible rather than presenting it only as a finished surface. Its motion follows modeled walking time and its marks encode service reach and catchment weight.

4 PROGRESSION

  • The scan’s front follows walking times computed over the OpenStreetMap network, while its services and connecting arcs encode the catchments and home- or work-based reach used by the index.Walking times use R5 at 3.6 km/h and end at 30 minutes; services light up as the front reaches them, with size and brightness following catchment weight.Source: §4 · p. 2
  • Catchment weight falls from 1 below 10 minutes to 0.03 above 20 minutes, so services beyond a 20-minute walk add little to the index.Gold arcs indicate services reached from home, while red arcs indicate services reached from residents’ workplaces.Source: §4 · p. 2
  • The scan exposes the cumulative reachability model by marking walking time from the selected cell as services, catchments, and demand accumulate.The interface activates the services and spatial relations that build the index.Source: §4 · p. 2

5 INTERFACE

The interface adapts a dark, luminous diagnostic style while tying visual encodings to quantities of the accessibility model. Making the fictional language operational requires addressing color accessibility, motion preferences, animation cost, and the authority implied by the display.

5 INTERFACE

  • The dark lattice, cool context, warm active regions, and luminous labels evoke an institutional diagnostic system, but each real-interface element must carry reproducible meaning.The fictional display needs only narrative plausibility; the real interface must connect its visual elements to model quantities.Source: §5 · p. 2
  • Four grid variables use separate ramps for accessibility, residents, workers, and the combination of retained accessibility with arriving daytime population.The bivariate palette crosses retained accessibility against the share of the daytime population arriving to work.Source: §5 · p. 2
  • The bivariate palette was designed in CIELCh and its nine opaque colors were simulated for three color-vision deficiencies, but the modified interface colors were not validated.The interface lightens the colors for the dark basemap and raises opacity with value.Source: §5 · pp. 2–3
  • Users with a reduced-motion browser preference see the assembled field without the scan, which can also be toggled in the legend.Source: §5 · p. 3
  • Animation runs inside each layer’s color accessor because rebuilding layer data per frame re-tessellates the grid and lowers frame rate.Source: §5 · p. 3
  • Explanations and parameters counter the display’s unexplained authority by exposing assumptions in the model.Source: §5 · p. 3

6 RESPONSE

The paper frames urban accessibility as a slow emergency and adapts the command center’s urgency to ask where connection is insufficient. That framing can make inequality immediate, but can also cast urban populations as threats, a tension the authors leave unresolved.

6 RESPONSE

  • The episode stages visual analytics under time pressure: automated systems detect patterns, while Ritsuko interprets adaptation and intervenes.Source: §6 · p. 3
  • Urban accessibility accumulates through ordinary journeys and unequal infrastructure, and the visualization asks where connection is insufficient.Source: §6 · p. 3
  • Emergency aesthetics can make persistent inequality immediate, but they can also cast urban populations as threats; the authors have not resolved this tension.Source: §6 · p. 3

7 OUTLOOK

The system is limited to Santiago and has not yet been used in planning practice. The authors identify required inputs for replication and propose studying what readers understand and remember from the animated scan versus a static map.

7 OUTLOOK

  • The system covers Santiago and has not yet been used in planning practice.Source: §7 · p. 3
  • Replication in another city requires resident counts, an OpenStreetMap street network, and job locations.Walking range could become a control, but that requires precomputing the index for each range, as for the four α values.Source: §7 · p. 3
  • A proposed study would compare the scan with a static map of the same index and measure readers’ understanding and memory.Source: §7 · p. 3

8 TRANSFER

The paper presents Santiago’s A.T. Field as a translation of a fictional scanning interface into an analytical instrument. Its transferable contribution is the account of the tensions that arise when fictional language is made operational.

8 TRANSFER

  • The fictional scanning lattice becomes an analytical substrate, while dramatic animation explains how the index is assembled.Source: §8 · p. 3
  • The authors identify the interface tensions as the cost of translation and as lessons transferable to other operationalized science-fiction instruments.Source: §8 · p. 3
  • The paper describes carrying an Evangelion instrument into a working interface in 2026, for a story set in 2015.Source: §8 · p. 3
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