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+.. _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
+
+   aeqd
+   airy
+   aitoff
+   alsk
+   apian
+   august
+   bacon
+   bipc
+   boggs
+   bonne
+   calcofi
+   cass
+   cc
+   ccon
+   cea
+   chamb
+   collg
+   crast
+   denoy
+   eck1
+   eck2
+   eck3
+   eck4
+   eck5
+   eck6
+   eqc
+   eqdc
+   euler
+   etmerc
+   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
+   moll
+   murd1
+   murd2
+   murd3
+   natearth
+   nell
+   nell_h
+   nicol
+   nsper
+   nzmg
+   ob_tran
+   ocea
+   oea
+   omerc
+   ortel
+   ortho
+   pconic
+   poly
+   putp1
+   putp2
+   putp3
+   putp3p
+   putp4p
+   putp5
+   putp5p
+   putp6
+   putp6p
+   qua_aut
+   qsc
+   robin
+   rouss
+   rpoly
+   sinu
+   somerc
+   stere
+   sterea
+   gstmerc
+   tcc
+   tcea
+   tissot
+   tmerc
+   tpeqd
+   tpers
+   ups
+   urm5
+   urmfps
+   utm
+   vandg
+   vandg2
+   vandg3
+   vandg4
+   vitk1
+   wag1
+   wag2
+   wag3
+   wag4
+   wag5
+   wag6
+   wag7
+   weren
+   wink1
+   wink2
+   wintri