Today Esri is proud to announce that we are making our own global collection of satellite imagery available to the OSM community directly through our existing World Imagery Service. This regularly updated resource provides one meter or better satellite and aerial photography in many parts of the world, 15m TerraColor imagery at small and mid-scales (~1:591M down to ~1:72k), 2.5m SPOT Imagery (~1:288k to ~1:72k), 1 meter or better NAIP in the US and many other curated sources, so we know it will make a welcome addition to OSM’s growing catalog of reference layers.
OSM editors have been able to trace maps from satellite imagery for years; other sources of such imagery have included Bing and Yahoo (back when Yahoo Maps was a thing). Different sources have different strengths, so this can only help the project. (Esri’s imagery makes no difference where I am, but that’s not a surprise.)
Martijn van Exel’s OSM Then and Now compares OpenStreetMap as it was in October 2007 with how it is today, with a slider to change how much you see of one or the other. Amazing how little was mapped back then, especially outside: my own town didn’t appear at all, and even Ottawa was rudimentary.
Quartz takes a look at the Missing Maps project, which I suppose can best be described as a way to jumpstart mapping the unmapped developing regions of the world with OpenStreetMap. What’s interesting about Missing Maps is how it systematically deals out tasks to people best able to do them: remote volunteers trace imagery, community volunteers do the tagging and labelling. There’s even an app, MapSwipe, that gives its users “the ability to swipe through satellite images and indicate if they contain features like houses, roads or paths. These are then forwarded onto Missing Maps for precise marking of these features.” [WMS]
“The OpenStreetMap Community is at a crossroads, with some important choices on where it might choose to head next,” wrote Michal Migurski last month. Identifying three types of map contributors—robot mappers using third party data, crisis mappers responding to a disaster like the Haiti earthquake, and so-called “local craft mappers” (i.e., the original OSM userbase that edits the map at the community level, using GPS tracks and local knowledge), Michal ruffled many feathers by saying that “[t]he first two represent an exciting future for OSM, while the third could doom it to irrelevance.” That’s largely because, in his view, the craft mappers’ passivity and complacency, and their entrenched position in the OSM hierarchy, are impeding the efforts of the other two groups.
Arun Ganesh talks about making a multilingual map of India: “Hardly anyone in India even knows that OSM can handle regional languages, simply because its not visible anywhere on the map. After some recent interest from the community in making regional language maps for openstreetmap.in, I decided to give this a shot to make a multilingual place map for India using OSM and Mapbox Studio that I have been playing with recently.”