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DAG-map – metro map visualization of a DAG
by pjettter·Mar 21, 2026·3 points·8 comments
AI Analysis
●●●BangerBig BrainEye CandyNiche Gem
Metro map metaphor for DAGs is genuinely clever visualization nobody else does.
Strengths
- •Metro map stations elegantly represent fan-in/fan-out nodes in pipelines
- •Left-to-right time flow with colored execution paths by node class
- •Standalone library with CSS theming and multiple routing options
Weaknesses
- •Niche audience limits adoption beyond pipeline visualization use cases
- •Demo shows promise but needs real-world integration examples
Category
Target Audience
Developers visualizing pipelines, workflows, and dependency graphs
Similar To
Graphviz · D3.js · Mermaid
Post Description
I searched for a library that promised the kind of layout and esthetics that I was after. This has been a recurring "issue" for me where I have something very specific in mind but can't seem to be able to mold anything existing into what I want.
Inspired from metro maps, like the London Underground, I wanted something that captures "stations" for crossings (fan-in, fan-out or processing nodes) and a left to right flow that, in my DAGs, often represent the flow of time.
Co-authored with Claude Code.
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