TactileMaps.net: A Web Interface for Generating Customized 3D-Printable Tactile Maps
Brandon T. Taylor, Anind K. Dey, Dan P. Siewiorek, Asim Smailagic · 2015 · ASSETS '15: Proceedings of the 17th International ACM SIGACCESS Conference on Computers & Accessibility · doi:10.1145/2700648.2811336
Summary
This demonstration paper presents TactileMaps.net, a web-based tool that enables visually impaired users to independently generate customized 3D-printable tactile maps. Tactile maps are valuable tools for helping blind individuals understand their environment, but traditionally they have been expensive to produce and require specialized expertise to design. The increasing availability of affordable 3D printers creates an opportunity to democratize tactile map production, but designing 3D models typically requires complex modeling software that is inaccessible to blind users. The system addresses this barrier through an accessible web interface where users can search for an address (using Google's Geocoding API), customize which geographic features to include, and generate a downloadable 3D model file (.stl format) suitable for printing. The back-end uses Python scripts that pull geographic data from OpenStreetMap and automatically encode features like roads, waterways, parks, and buildings into distinct tactile textures. Roads are extruded upward with thickness corresponding to road type (major roads thicker than minor ones), waterways are represented by dome patterns, and parks by pyramid textures. The interface was designed following AChecker accessibility recommendations to ensure screen reader compatibility. The authors conducted focus groups with 10 visually impaired individuals to inform design decisions, presenting printed map examples and gathering feedback on tactile representations and use cases.
Key findings
Focus group feedback revealed several important design insights. For labeling, users found braille text printed at angles (following road paths like visual maps) confusing. They preferred single-letter braille markers on the map front with a horizontally-aligned legend on the back. This finding highlights that direct translation of visual map conventions does not work for tactile formats. Users expressed interest in maps at widely varying scales—from understanding relationships between city neighborhoods to locating building entrances—presenting a design challenge for creating a tool that accommodates diverse use cases without interface complexity. Similarly, information density emerged as a key concern: while 3D printing offers fine granularity in both horizontal and vertical dimensions, overly dense maps become difficult to interpret tactilely. The authors identified that optimal tactile map design requires establishing usability guidelines for mapping geographic features to physical textures, which they aim to develop through ongoing user research. The system was published online at www.tactilemaps.net to collect usage statistics and user feedback at scale.
Relevance
This work represents an important step toward making tactile maps accessible and customizable for blind individuals. Traditional tactile map production required either expensive professional services or technical expertise in 3D modeling—both significant barriers. By automating the conversion of open geographic data (OpenStreetMap) into 3D-printable tactile features through an accessible web interface, the system enables blind users to independently create maps of any location they need. For accessibility practitioners, this research illustrates several broader principles: the importance of involving users in design (focus groups revealed that direct translation of visual conventions fails), the potential of emerging fabrication technologies (3D printing) to enable personalized assistive devices, and the value of leveraging open data sources for accessibility applications. The finding that braille labels work better as indexed references rather than inline text is applicable to other tactile graphics contexts. As consumer 3D printers become more common in libraries, makerspaces, and homes, tools like TactileMaps.net could significantly expand access to geographic information for blind travelers.
Tags: visual impairment · tactile graphics · 3D printing · maps · wayfinding · assistive technology · fabrication