.. _projections:

================================================================================
Projections
================================================================================

Projections are coordinate operations that are technically conversions but since
projections are so fundamental to PROJ we differentiate them from conversions.

Projections map the spherical 3D space to a flat 2D space.

.. toctree::
   :maxdepth: 1

   aea
   aeqd
   airy
   aitoff
   alsk
   apian
   august
   bacon
   bertin1953
   bipc
   boggs
   bonne
   calcofi
   cass
   cc
   ccon
   cea
   chamb
   collg
   comill
   crast
   denoy
   eck1
   eck2
   eck3
   eck4
   eck5
   eck6
   eqc
   eqdc
   eqearth
   euler
   fahey
   fouc
   fouc_s
   gall
   geos
   gins8
   gn_sinu
   gnom
   goode
   gs48
   gs50
   hammer
   hatano
   healpix
   rhealpix
   igh
   imw_p
   isea
   kav5
   kav7
   krovak
   labrd
   laea
   lagrng
   larr
   lask
   lcc
   lcca
   leac
   lee_os
   loxim
   lsat
   mbt_s
   mbt_fps
   mbtfpp
   mbtfpq
   mbtfps
   merc
   mil_os
   mill
   misrsom
   moll
   murd1
   murd2
   murd3
   natearth
   natearth2
   nell
   nell_h
   nicol
   nsper
   nzmg
   ob_tran
   ocea
   oea
   omerc
   ortel
   ortho
   patterson
   pconic
   poly
   putp1
   putp2
   putp3
   putp3p
   putp4p
   putp5
   putp5p
   putp6
   putp6p
   qua_aut
   qsc
   robin
   rouss
   rpoly
   sch
   sinu
   somerc
   stere
   sterea
   gstmerc
   tcc
   tcea
   times
   tissot
   tmerc
   tobmerc
   tpeqd
   tpers
   ups
   urm5
   urmfps
   utm
   vandg
   vandg2
   vandg3
   vandg4
   vitk1
   wag1
   wag2
   wag3
   wag4
   wag5
   wag6
   wag7
   webmerc
   weren
   wink1
   wink2
   wintri
