Using the proj=tpers projection, define a tilted perspective view using:

• h: height (in meters) above the surface
• azi: bearing (in degrees) from due north
• tilt: angle (in degrees) away from nadir
• lat_0: latitude (in degrees) of the view position
• lon_0: longitude (in degrees) of the view position

Putting it all together, here is an example PROJ.4 string for part of Europe:

+proj=tpers +ellps=WGS84 +h=5000000 +azi=30 +tilt=40 +lat_0=20 +lon_0=0

Define a tilted perspective projection (tpers) using:

• h: height (in meters) above the surface
• azi: bearing (in degrees) from due north
• tilt: angle (in degrees) away from nadir
• lat_0: latitude (in degrees) of the view position
• lon_0: longitude (in degrees) of the view position

Putting it all together, here is an example PROJ string for part of Europe:

+proj=tpers +ellps=WGS84 +h=5000000 +azi=30 +tilt=40 +lat_0=20 +lon_0=0