Items tagged d3 in 2021
Filters: Year: 2021 × d3 × Sorted by date
Plot & Vega-Lite. Useful documentation comparing the brand new Observable Plot to Vega-Lite, complete with examples of how to achieve the same thing in both libraries. # 4th May 2021, 4:32 pm
Observable Plot (via) This is huge: a brand new high-level JavaScript visualization library from Mike Bostock, the author of D3—partially inspired by Vega-Lite which I’ve used enthusiastically in the past. First impressions are that this is a big step forward for quickly building high-quality visualizations. It’s released under the ISC license which is “functionally equivalent to the BSD 2-Clause and MIT licenses”. # 4th May 2021, 4:28 pm
Render single selected county on a map (via) Another experiment at the intersection of Datasette and Observable notebooks. This one imports a full Datasette table (3,200 US counties) using streaming CSV and loads that into Observable’s new Search and Table filter widgets. Once you select a single county a second Datasette SQL query (this time retuning JSON) fetches a GeoJSON representation of that county which is then rendered as SVG using D3. # 5th April 2021, 4:48 am
Animated choropleth of vaccinations by US county
Last week I mentioned that I’ve recently started scraping and storing the CDC’s per-county vaccination numbers in my cdc-vaccination-history GitHub repository. This week I used an Observable notebook and d3’s TopoJSON support to render those numbers on an animated choropleth map.
[... 1138 words]When building a tool, it’s easy to forget how much you’ve internalized: how much knowledge and context you’ve assumed. Your tool can feel familiar or even obvious to you while being utterly foreign to everyone else. If your goal is for other people to use the darn thing — meaning you’re not just building for yourself, or tinkering for its own sake (which are totally valid reasons) — you gotta help people use it! It doesn’t matter what’s possible or what you intended; all that matters is whether people actually succeed in practice.
— Mike Bostock # 23rd February 2021, 10:55 pm