What We Build

Most review sites only talk about technology. We use it. Alongside the guides and breakdowns we publish, we design and ship production software with the same leading-edge platforms we cover. It's how we know a tool actually holds up before we recommend it, and it's proof that the analysis here comes from people who build, not just people who watch.

Our flagship project is NYC Live, a real-time command center for New York City. It began with a simple frustration: there was no single place to see the whole city in real time. So we built one.

How we built it

NYC Live looks simple from the front seat, but underneath it pulls together a lot of moving parts. Here's the plain-English version of how it works.

1. Pulling in the feeds

The city and several public services publish live data, but each one speaks its own format. NYC Live continuously polls those sources, cleans up the differences, and turns them into one consistent stream the map can read. The headline feed is the NYC Department of Transportation's network of 960+ traffic cameras, which refresh every 2 seconds, matching the DOT's own live interval.

2. Putting the city on a map

The map itself is built with Leaflet.js, a lightweight open-source mapping library, drawing its street tiles from OpenStreetMap and CARTO. Every camera, incident, and data point is plotted at its real coordinates, so what you see on screen lines up with where it's actually happening in the city.

3. Keeping it live

Real-time is the hard part. Rather than reloading whole pages, NYC Live swaps in fresh camera images and data on a short timer, so hundreds of feeds stay current at once without grinding a browser to a halt. The result is a view of the city that updates as fast as the source data allows.

4. Modeling what the city is doing

The most interesting piece is the population model. It starts from the 2020 U.S. Census baseline of 8,336,817 residents, applies the NYC Department of City Planning's growth projection of roughly 0.4% a year to reach a current estimate near 8.55 million, then distributes those people across nine hourly activity windows (commuting, working, sleeping, shopping, and more). Each window is calibrated against real signals: hourly MTA turnstile counts, census data, and the Bureau of Labor Statistics Consumer Expenditure Survey. So at 8 AM the model shows commuting peaking around 26.5% of the city, while shopping peaks near 13.2% in the mid-afternoon.

The data behind it

NYC Live is stitched together from public, verifiable sources. That transparency is the same standard we hold our written work to:

• Traffic: NYC Department of Transportation live cameras
• Transit: MTA turnstile data and NYC Ferry service status
• Air quality: EPA AirNow (PM2.5 and pollutant monitoring)
• Weather: Open-Meteo and RainViewer
• Waterways: MarineTraffic ship tracking
• Population: U.S. Census, NYC Department of City Planning, and BLS survey data
• Mapping: Leaflet.js, OpenStreetMap, and CARTO

Why this matters for readers and partners

Anyone can publish a review. Shipping a live product with hundreds of real-time data sources is a different bar, and it's the one we hold ourselves to. For readers, it means our recommendations are grounded in hands-on experience. For brands and partners who work with us, it means your product is being evaluated by a team that understands what production really demands.

NYC Live is the first project we've put front and center, and it won't be the last. If you'd like to work with us or sponsor what we build next, reach out on X @NWExplained.