Tag Archives: datavis

SEDAC Population Estimator

The Population Estimation Service is a Web-based service for estimating population totals and related statistics within a user-defined region. It enables users of a wide variety of map clients and tools to quickly obtain estimates of the number of people … Continue reading

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Feeding the Audio Graph – Using Web Audio’s AnalyserNode

Good article on 24ways (yes, that still is a thing) on using Web Audio’s AnalyserNode. const waveform = new Uint8Array(analyser.fftSize); const frequencies = new Uint8Array(analyser.frequencyBinCount); const ctx = canvas.getContext(‘2d’); const loop = () => { requestAnimationFrame(loop); analyser.getByteTimeDomainData(waveform); analyser.getByteFrequencyData(frequencies); ctx.beginPath(); waveform.forEach((f, … Continue reading

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Strava Global Heatmap

Strava has released a Global Heatmap powered by Mapbox GL, plotting all locations where their users go run / go cycle / do water activities / do winter activities. The raw input activity streams data comes from a Spark/S3/Parquet data … Continue reading

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A New Kind of Map: It’s About Time

The Mapbox Team: Recently, we’ve been thinking of a visualization that cuts directly to the way in which people make decisions about where to go: what would a map look like if we swept the physical world away completely, in … Continue reading

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Spark: A Typeface for Creating Sparklines in Text Without Code

Spark is a typeface for creating sparklines in text. It uses OpenType’s contextual alternates and requires no Javascript, though it does require a modern-ish browser that can make use of OpenType features in text. Spark data needs to be formatted … Continue reading

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D3 in Depth: Rendering Geographic Information

D3 in Depth has dedicated a chapter to rendering geographic information. D3’s approach differs to so called raster methods such as Leaflet and Google Maps. Typically D3 requests vector geographic information in the form of GeoJSON and renders this to … Continue reading

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Uber Visualization Nights: deck.gl

During the first “Uber Visualization Night” on June 20, 2017, Nicolas Belmonte from Uber’s Data Visualization team gave a nice introduction to the aforementioned deck.gl:

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Every Solar Eclipse Happening in your Lifetime

The Washington Post has created a nice article on the upcoming solar eclipse that will cross the United States On Aug. 21, a total solar eclipse will be visible from the contiguous United States. It’ll be the first to traverse … Continue reading

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Exploring interdependencies in global resource trade

The volume of natural resources traded globally has increased over 60% since the turn of the century, reflecting and reinforcing new economic and geopolitical realities and bringing new environmental and social challenges – as well as opportunities. Now everyone can … Continue reading

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The problem with maps // Playing with Projections

One of the core ideas covered in my talk named “Geoshizzle” on mapping is that the Mercator projection is way overdue. It’s main feature of preserving angle measurements is no longer feasible in this time and age (it was back … Continue reading

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