How to get a "classical" globe projection

Question

I have a shapefile of the world continents in EPSG 4326.

To what reference system do I have to reproject my file to get a projecting like this globe below? enter image description here

score 15 · Accepted Answer · edited Apr 25 '14 at 18:38

15

This family of projection is called azimuthal orthographic (all rays from globe to flat map are parallel). You can define the Lat/long coordinates of the center of the projection to choose the visible hemisphere.

There is no EPSG code from what I know, but here is the PROJ.4 definition.

+proj=ortho +lat_0=Latitude at projection center 
            +lon_0=Longitude at projection center
            +x_0=False Easting
            +y_0=False Northing

example with lat = 0 and long = -41

edited Apr 25 '14 at 18:38

Martin F

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answered Apr 25 '14 at 09:11

radouxju

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If you use a shapefile, you might have to clip it to the visible half of the globe, as I explained here: http://gis.stackexchange.com/questions/70207/where-did-the-polygons-go-after-projecting-a-map-in-qgis – AndreJ Apr 25 '14 at 10:01

score 1 · Answer 2 · answered Apr 25 '14 at 18:49

A variation (on the already suggested azimuthal orthographic projection) would be to use an azimuthal perspective projection, similar to what's used in Google Earth. This mimics what you'd see looking at a real globe via the lens of the eyes or camera, but covering a little less than a "full" hemisphere. I don't know the parameters to use, but you'd need to experiment with different altitudes and scales to get close to your given sketch map.

score 0 · Answer 3 · answered Mar 30 '18 at 02:00

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My web-based Globus Map Projector can also do that for you. Go here: https://www.winski.net/?page_id=12, and choose the full version of the projector. From there you can simply select your project to to ortographic.

answered Mar 30 '18 at 02:00

Michał

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How to get a "classical" globe projection

3 Answers3