Eugene Alvin Villar 🇵🇭Nov 25, 2023

#30DayMapChallenge 🗺️ Day 2️⃣3️⃣: 3D

(Almost caught up!)

After creating the previous day’s plate carrée #qibla map, I remembered that this map projection is popular as a texture format when rendering 3D spheres and used in apps like @kde’s Marble,¹ NASA World Wind, and Celestia.²

So I opened Marble, created a new theme using my map, et voilà! We now have an undistorted world map with #Mecca as the north pole! 💪

¹ https://userbase.kde.org/Marble/WizardMap#WorldMap_Bitmap
² https://www.classe.cornell.edu/~seb/celestia/textures.html

#KDE #KDEMarble #PlateCarrée

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Marble/WizardMap - KDE UserBase Wiki

Show threadEugene Alvin Villar 🇵🇭

This makes my map *slightly* more usable because with Marble’s coordinate grid, you can now pan the globe around and actually visualize the #qibla as meridians. This is even more apparent if you switch to Marble’s azimuthal equidistant projection (pictured), which is the usual way this sort of maps are depicted.

(Of course, nobody would really use this solution to locate the qibla, there are plenty of mobile apps that use the GPS and compass sensors for that!)

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Nov 25, 2023 at 4:21amWeb