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Introducing Type Guard to Steep February 2, 2026 Type Narrowing for Real-World Ruby Applications Based on the RubyKaigi 2025 talk “Introducing Type Guard to Steep” by Takeshi Komiya CTO at Time Intermedia Inc., maintainer of rbs_rails and Rails type generators. Presented at RubyKaigi 2025. Context and Attribution This article is a technical analysis and expansion … Continue reading Introducing Type Guard to Steep
Rendering Incremental Points on Maps with Ruby and Rails January 30, 2026 When working with maps in Ruby or Ruby on Rails applications, most solutions assume that all geospatial data must be prepared upfront — usually as GeoJSON layers. While this works well for static datasets, it becomes inefficient when dealing with event-driven data such … Continue reading Rendering Incremental Points on Maps with Ruby and Rails
Understanding TypeProf: Design Goals, Limitations, and Effective Use in Ruby January 28, 2026 TypeProf is an official type inference tool for Ruby that has gained attention as part of the ecosystem surrounding RBS, Steep, and Sorbet. Despite this visibility, it is frequently misunderstood and often perceived as “not working” by first-time users. This article analyzes … Continue reading Understanding TypeProf: Design Goals, Limitations, and Effective Use in Ruby
January 27, 2026 From Disaster Prevention to High-Performance Maps On December 26, 2025, I published an article titled “Ruby at the Front Line of Disaster Prevention.” It was inspired by a real, uncomfortable fact: Tokyo Gas uses Ruby to protect millions of people during earthquakes. Not in theory. Not as a prototype. In production. That … Continue reading Ruby Rendering Seismic Observation Data
January 26, 2026 For many years, Ruby developers working with maps and geospatial data have relied on external tools or loosely coupled pipelines. ImageMagick, command-line utilities, and background processes became the norm, even though they were never designed to be deterministic GIS rendering engines. The result was fragile systems: slow, hard to debug, and difficult … Continue reading Stabilizing a Native Ruby GIS Engine with Docker, RuboCop, and CI
January 21, 2026 Distributing images securely is a recurring challenge in modern web applications. Whether for previews, confidential documents, or paid content, developers often need to ensure that images are not reused, hotlinked, or accessed indefinitely. Imprint is a Ruby gem that addresses this problem by providing signed, time-limited image rendering with dynamic watermarks, allowing … Continue reading Imprint: Signed, Expiring Image Rendering with Dynamic Watermarks in Ruby
For years, maps in Rails applications have lived almost entirely on the frontend:JavaScript libraries, external APIs, keys, variable costs, and a fair amount of friction. map_view starts from a simple question: What if maps in Rails were as simple as rendering a view? <%= map_for @locations %> That’s it. What is map_view? map_view is a … Continue reading map_view — Server-side maps for Ruby on Rails
Text & Layout Foundations for Ruby Graphics January 14, 2026 The biggest limitation of most Ruby image libraries is not pixels — it’s text. Fonts, labels, positioning, alignment, rotation, and layout are what separate a toy renderer from a real graphics engine. Until now, ruby-libgd only exposed a very minimal wrapper around FreeType. It worked, … Continue reading ruby-libgd v0.2.2 — Text & Layout Foundations for Ruby Graphics
January 13, 2026 Rivers of Europe and Entre Ríos rendered directly in Ruby Today marks a major milestone for libgd-gis: we crossed from “experimental map renderer” into a real GIS-grade drawing engine. Using nothing but Ruby + libgd, we are now able to render continent-scale river networks, provincial hydrology, and complex GeoJSON layers with proper … Continue reading libgd-gis moves into serious cartography territory
January 9, 2026 How I built a pure-Ruby GIS engine that renders Paris, Tokyo, New York, and more Most people don’t think of Ruby when they think about maps, GIS, or visual computing. If you want to draw a real city, the standard stack usually looks like: QGIS PostGIS Mapnik Mapbox or a heavy JavaScript … Continue reading Ruby Can Draw Cities Now
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