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Articles

7 posts
maps projections

The UN Just Endorsed Equal Earth — Here's What Mercator Was Actually Doing to Africa

On 4 September 2026 the UN General Assembly encouraged the world to move from Mercator to the Equal Earth projection. Using Natural Earth boundaries and a spherical Earth model, Africa is approximately 13.9× Greenland. In our Mercator rendering it occupies approximately 0.95× Greenland’s area.

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ai on-device

A Design Assistant That Runs On Your Device — No Account, No Server

PinePaper's on-device AI assistant turns a prompt into a real scene using a language model that runs entirely in your browser. Here's the architecture — constrained tool calls, two providers, and an honest account of what a tiny model can and can't do.

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mathematics ode

How a Pendulum Teaches You Differential Equations

You don't need a math degree to understand ODE solvers. You need a pendulum, a screen, and 20 minutes. Here's how Euler, RK4, and adaptive methods actually work — with the real code.

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mathematics fft

What the FFT Actually Shows You

Every sound you hear is a sum of sine waves. The Fast Fourier Transform decomposes that sum. Here's what that means, how it works, and why a 60-year-old algorithm is still everywhere.

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gif animation

How Animated GIFs Actually Work — From Canvas Frames to LZW Compression

The GIF format is 39 years old and still everywhere. Here's what happens between clicking 'Export' and getting a file — frame capture, color quantization, LZW compression, and why your GIF is 4MB.

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video mp4

How We Built Browser-Native MP4 Export — No Server Required

PinePaper exports MP4 video entirely in the browser using WebCodecs. Here's how the H.264 pipeline works — from canvas frames to a playable video file, without uploading anything.

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