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CHI '26 · Honorable mention · full-paper review · confidence medium-high

CoMap: A Collaborative 3D Sketch Mapping Game to Engage Spatial Communication in Search and Rescue

Tianyi Xiao , Sailin Zhong , Peter Kiefer , Miki Mizuki , Phoebe O. Toups Dugas , Martin Raubal

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CoMap is a credible CHI systems contribution: it takes a familiar SAR practice, sketch mapping, and reworks it into a shared 3D VR collaboration space. The novelty is mainly in the interaction/system design and in the experimental evidence that it can outperform 2D sketch mapping in a simulated rescue setting.

Axes Lens

Rare contribution shape, typical evidence profile. The point here is not a score. It is to show what kind of claim the paper makes, and whether the evidence pattern is unusual or baseline in this 268 -review set.

Review Summary

CoMap reads as a strong CHI paper because it combines a clear practical problem, a concrete interaction/system proposal, and a comparative evaluation that speaks directly to the target task. The paper’s main move is not to invent SAR communication from scratch, but to challenge the default 2D, paper-centric assumption by making sketch mapping collaborative and three-dimensional in VR. That is a sensible departure from common practice because the problem space itself is spatial, asymmetric, and collaborative, so the design rationale is easy to follow. The novelty claim is strongest at the system level: the paper positions CoMap as a first-of-its-kind collaborative 3D sketch mapping interface and emphasizes a shared workspace for distributed teams to co-maintain a map as a visual reference. The validation is also reasonably aligned with the claim: a within-subject study with 13 commander–field team pairs, plus communication analysis, is enough to support a controlled comparison against conventional 2D sketch mapping and to show that the system can improve communication accuracy, efficiency, and proactive description behavior. The main caution is scope. The evidence is still from a VR fire-rescue game, not live SAR operations, so the paper supports a task-class argument more than a field-deployment claim. Any real-world adoption would need to contend with operational stress, environmental dynamics, connectivity, and the complexity of actual incident command. So my read is: technically solid, clearly motivated, and appropriately evaluated for a CHI honorable-mention level contribution, with the usual caveat that the strongest claims are about simulated collaboration and design implications rather than proven field deployment.

What Changed

Canon before

Paper-based 2D sketch mapping is the conventional baseline for SAR coordination, with remote collaboration and 3D spatial complexity treated as persistent limitations of existing practice.

Departure from common sense

The paper argues against the default assumption that SAR sketch mapping should remain paper-based and 2D. Instead, it frames 3D collaborative sketch mapping in VR as a better fit for spatial communication when teams have heterogeneous perspectives and asymmetric information.

Actual novelty

The paper presents CoMap as a first-of-its-kind collaborative 3D sketch mapping interface that provides a shared workspace for distributed teams to co-maintain a map as a visual reference, supporting spatial communication and collective spatial cognition.

Evidence

The paper’s core contribution is a collaborative 3D sketch mapping system for SAR communication, positioned as novel relative to conventional 2D paper-based sketch mapping. Validation is a within-subject VR fire-rescue study with 13 commander–field team pairs, where CoMap is reported to improve spatial communication accuracy and efficiency and to elicit more proactive descriptions. The evidence supports a system-level contribution with experimental comparison, but the claims remain bounded to a simulated VR fire-rescue setting rather than live SAR deployment.

Limits

Method limits

The validation is a within-subject study in a virtual reality fire-rescue game with 13 commander–field team pairs, so the evidence is comparative but still tied to a controlled simulation rather than operational SAR conditions.

Deployment limits

The paper’s implications are strongest for SAR training and prototype mapping tools; transfer to real deployments depends on whether teams can use the system under field constraints, connectivity limits, and the pressures of live incidents.

Boundary conditions

The reported benefits are bounded by the VR fire-rescue scenario, the commander–field team dyad structure, and comparison against conventional 2D sketch mapping. Generalization beyond fire-rescue, beyond two-role coordination, and beyond the study’s communication tasks should be treated cautiously.

Manual check: Verify the exact limitation wording from Section 10 if a stricter limitation citation is required; current review relies on the supplied abstract and stage-A evidence packet only.

Position in field

This sits at the intersection of collaborative mapping, spatial communication, and SAR support tools. Its field position is as a systems-and-interaction contribution that extends sketch mapping into shared 3D VR collaboration rather than as a purely conceptual or observational paper.

Abstract

Search and rescue (SAR) is a complex teamwork environment that requires efficient spatial communication between commanders and field teams with heterogeneous perspectives and asymmetric information. Maps are central artifacts in SAR, yet they are also a space of technological tension due to constantly changing situation at disaster sites. Sketch mapping is an effective method of externalizing and communicating spatial understanding, increasing situation awareness in spatial decision-making tasks including SAR. Current paper-based sketch mapping in SAR struggles to handle the three-dimensional nature of physical space and remote collaboration. We propose CoMap, a collaborative 3D sketch mapping system validated in a virtual reality fire-rescue game. In a within-subject study with 13 commander–field team pairs, CoMap enabled more accurate and efficient spatial communication than conventional 2D sketch mapping. Communication analysis further showed that CoMap fostered proactive descriptions. We distill three design implications for next-generation mapping tools to advance SAR training and real-world operations.