One can notice the depth of the ocean floor, on a global scale, ranges between -2000 and -6000 meters. In some regions though like the Pacific exceed this range and reach 11 kilometers below the sea surface. One such region is the deepest point on Earth, the Mariana trench as shown below followed by a map for a perspective of its location.
Everyone uses digital maps these days, I assume. At least I do. Since I’ve been using them more often lately, I checked if there are any apps for Linux and especially Ubuntu. The search returned 4 apps.
Maps (aka gnome-maps)
is a map application for GMONE. Its use is slick and fast. It is supposed to be simplistic
Search and directions is functional (based on MapQuest if I’m not mistaken) but geolocation isn’t. Moreover, the satellite imagery is not available at high resolution.
The following (bubble and choropleth, respectively) maps display the magnitude of people who died in Batroun (a city of northern Lebanon) during the 1915-1918 famine that hit Lebanon.
For extensive information on this famine I refer you to the French book “Histoire de la Grande famine au Mont-Liban (1915-1918) – Un genocide passe sous silence” by professor Antoine Boustany (ISBN: 9789953031194). You can find it at Librairie Antoine (order it online here).