“When you open Longitude you’ll see a number of “Times T” pins plotted out in a Google Map. The locations for these pins were all derived from Geonames. Click on any pin and you’ll be presented with a pop-up balloon containing a list of the ten most recent, relevant Times articles. But wait, there’s more! For some locations such as Missouri, your balloon will have one or two additional tabs: “Natives” and/or “Companies.” Click on one of these tabs and you’ll be presented with list of locally-born people and locally-headquartered organizations. You can even view Times articles for these people and organizations.”
Read Sandhaus’s pitch for Longitude, in which he also promises future posts about technical details of the app.