Processing Landsat 8 Using Open-Source Tools

By Charlie Loyd

This step-by-step post walks through processing Landsat 8 imagery into an interactive map that you can integrate into your website or app. We’ll cover the process from finding and downloading the image data…

Putting Landsat 8’s Bands to Work

By Charlie Loyd

Here’s a picture of LA, just like an ordinary digital camera would take (if it had ten times as many megapixels and were in space). The image is only two weeks old, taken from Landsat 8, launched by NASA late this winter. Landsat…

9 Years of OpenStreetMap GPS Tracks Available for Mapping

By Eric Fischer

All public GPS tracks ever uploaded to OpenStreetMap are now available for tracing in the iD editor. Click the new “OpenStreetMap GPS traces” option in the background settings panel to…

Mapping a golf course

Mapping the open web using GeoJSON

By Sean Gillies

GeoJSON is an open format for encoding information about geographic features using JSON. It has much in common with older GIS formats, but also a few new twists: GeoJSON is a text format, has a flexible schema, and is specified…

Mapping Millions of Dots

By Eric Fischer

I’ve made a lot of maps out of dots before, but the ones we made from Gnip’s Twitter archives, which were featured in Wired Design a few days ago, were my first experience trying to make dot maps that would work at any scale, anywhere in the…

Using Leaflet plugins with MapBox.js: A Showcase

By John Firebaugh

One of the reasons we built MapBox.js
v1 on top of Leaflet was
its robust plugin ecosystem. The Leaflet plugins
page lists dozens of plugins, and more are
being added every week. In fact, MapBox.js…

Visualizing 3 Billion Tweets

By Eric Gundersen

This is a look at 3 billion tweets — every geotagged tweet since September 2011, mapped, showing facets of Twitter’s ecosystem and userbase in incredible new detail, revealing demographic, cultural, and social patterns down to city…

Neighborhood Mapping with Dynamic Vector Data Layers

By Bobby Sudekum

With last week’s release of MapBox.js 1.0, adding vector data to your MapBox map is a lot easier. A sophisticated example of mapping with vector data is Hipmunk’s hotel search. This post walks you…

Using TileMill’s raster-colorizer

By Chris Herwig

Terrain maps are awesome, but creating them has been at best a complicated six-step process.

1. Reproject the data with gdalwarp
2. Create hillshades with gdaldem hillshade