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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
Making Maps with Ruby January 29, 2026 Static and animated cartography built directly from GeoJSON For a long time, generating maps from code meant working inside heavy ecosystems designed primarily for analysis. Those tools are powerful, but they are not always the right fit. In many practical scenarios, the problem is simpler and more concrete: … Continue reading Making Maps with Ruby
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 22, 2026 libgd-gis, satellite imagery, and a new way to think about maps Most mapping libraries start from the same place: roads, labels, vectors, tiles. But what happens if the map itself is not the goal? What if the map is just a lens to observe the planet? This article is about how libgd-gis, … Continue reading A New View of Earth, Powered by Ruby
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
Senior Ruby Engineer · Open-Source Author (ruby-libgd, libgd-gis) · FinTech & GIS January 20, 2026 In modern development teams, Proofs of Concept (PoC) are everywhere. They usually start as Jupyter notebooks: quick experiments, charts, metrics, comparisons, and visual insights. They work well for exploration — but too often, they stop there. The knowledge stays locked … Continue reading Running Notebooks the Ruby Way: From PoC to Production with RubyPyMill
Stabilizing the libgd-gis Rendering API January 19, 2026 This article documents the current state of libgd-gis following a significant internal update: the stabilization and freeze of its core rendering API. The update consolidates the project’s primary responsibilities—static GIS rendering, layered composition, and post-render image manipulation—into a stable and documented surface. Alongside this milestone, comprehensive documentation … Continue reading Now Ruby GIS Rendering: Stabilizing the libgd-gis Rendering API
Ruby Now Has an Animated Map Engine January 15, 2026 Building real-time, animated maps in pure Ruby — no JavaScript required. A new class of maps for Ruby Over the past weeks, we’ve been extending ruby-libgd and libgd-gis far beyond static image rendering. What started as a raster + GIS toolkit is now evolving into … Continue reading Ruby Now Has an Animated Map Engine (Alpha Preview)
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
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