A distributed research infrastructure should be capable of comparison without compulsory equivalence, openness without loss of context, prediction without methodological opacity, and public visibility without assuming that visibility itself constitutes participation. Situated infrastructural legibility turns the field into an inspectable chain of translations in which every enlargement of a claim carries an obligation to disclose its evidential basis. What it adds to Socioplastics is a method for connecting heterogeneous knowledge while keeping scale, provenance, difference and consequence visible; within the field, that capacity condenses as ScalarArchitecture.

Infrastructure becomes legible when its material arrangements can be read together with the movements, exclusions, representations and decisions they produce. Legibility is the capacity to connect heterogeneous evidence without erasing the conditions under which each trace becomes meaningful. A street network, pedestrian count, public image, drainage model, food route or institutional category becomes informative only when its relation to bodies, rules, scales and local practices can be reconstructed. Situated infrastructural legibility therefore names a mode of knowledge in which systems are made readable through the consequences they distribute. This alters the epistemic status of modelling. Predictive pedestrian research shows that abstraction is productive when its scale and limits remain explicit. Network centrality can reveal aggregated tendencies; agent-based models can test local dynamics; field counts can validate or contradict both. None is sufficient in isolation. The strongest evidence emerges through controlled translation among levels of description. The same principle governs open-source sanitation mapping: remote representation gains credibility when returned to direct observation, interviews and administrative knowledge. Validation is therefore not an afterthought attached to a finished model. It is an infrastructural circuit through which abstraction repeatedly encounters the world that it claims to describe. Legibility is equally political because infrastructures distribute access before they become objects of public debate. Food, sanitation, mobility and civic imagery all show that apparently technical systems are composed through unequal relations. Formal grids coexist with informal arrangements; central streets concentrate encounter; visual environments privilege some identities over others; marginalised populations improvise around gaps that conventional maps may classify as absence. Decolonial design sharpens the consequence: no universal descriptive language is innocent if it converts distinct worlds into deviations from a single normative system. Pluriversality is therefore not an argument against comparison. It is a demand that comparison preserve the difference between what can travel, what must be translated and what should remain locally irreducible. Public space makes these relations perceptible because movement and representation overlap there. Co-presence converts spatial configuration into social possibility; public imagery converts surfaces into civic address. A route can enable encounter without guaranteeing interaction, just as an artwork can enter public space without producing public agency. The relevant analytical object is therefore the relation between arrangement and consequence. Urban form, visual culture and infrastructure become comparable when each is treated as a field of permissions: what can move, appear, gather, circulate, remain, or acquire institutional recognition. Situated evidence records those permissions without presuming that they have identical meanings everywhere. Socioplastics can operationalise situated infrastructural legibility as a discipline of evidential movement. Its texts, images, videos, maps, field notes, DOI deposits, datasets and conceptual operators should not merely accumulate as parallel media. Each can record a distinct condition and each translation should preserve enough provenance to show what changed between body, image, dataset, model, archive and public claim. The corpus becomes stronger when its architecture exposes not only what it contains but how evidence moved, which scales were crossed, which relations were inferred, and where uncertainty or local irreducibility remains. The same logic applies to urban research: walking, photography, observation, modelling and publication become successive evidential states rather than interchangeable illustrations. This adds a political constraint to field-building.