MasterMaps

In my last blog post , we projected an equirectangular photograph on a sphere using three.js. Today, we'll use the same panorama to create a wee (miniature) planet. A wee planet is a panorama projected to look like small planets using a stereographic projection . There is a great collection of wee planets from Alexandre Duret-Lutz on Flickr . There are image software you can use to create wee planets, but why not be a real map nerd and use GDAL instead? We already have a 360°x180° panorama in an equirectangular projection . The only difference from a world map is that the panorama is not georeferenced. Let's do it with gdal_translate : gdal_translate -of GTiff -a_ullr -180 90 180 -90 -a_srs EPSG:4326 bergsjostolen.jpg bergsjostolen.tif We pretend our new GeoTIFF to be the world, and use gdalwarp to create a wee planet using the stereographic projection: gdalwarp -wo SOURCE_EXTRA=10000 -r bilinear -te -22500000 -22500000 22500000 22500000 -ts 1000 1000 -s_srs EPSG:...

Ever wanted to create those fancy-looking 360° panoramas? If you mix a mobile phone with three.js and some knowledge about (map) projections, it's quite easy.  I love travelling, especially to mountainous areas of our planet. Taking photos of vast landscapes can be challenging. This drew my interest in spherical panoramas,  photographs that captures everything around you - up, down and all around - 360 x 180 degrees.  Google calls it a photo sphere , and if you own a mobile phone with Android 4.2 or higher, you can easily create one yourself . I captured this winter scene with my phone a few days ago. But what if you want to get rid of the Google wrapping and show your panorama in your own viewer? Let's try to do it with three.js. If you download the image from your phone it looks like this: This is called an equirectangular photograph , which will be entirely seamless when wrapped around a sphere. It has the same projection as most of the world m...