projInfo.RdThe projInfo function lists known values and descriptions for PROJ.4 tags for tag in c("proj", "ellps", "datum", "units"); getPROJ4VersionInfo returns the version of the underlying PROJ.4 release, getPROJ4libPath returns the value of the PROJ_LIB environment variable, projNAD detects the presence of NAD datum conversion tables (looking for conus).
projInfo(type = "proj")
getPROJ4VersionInfo()
getPROJ4libPath()
projNAD()
GDAL_OSR_PROJ()
GDALis3ormore()
PROJis6ormore()
new_proj_and_gdal()One of these tags: c("proj", "ellps", "datum", "units")
The output data frame lists the information given by the proj application with flags -lp, -le, -ld or -lu. From PROJ 6, "datum" is not available. From PROJ 7.1.0, "units" returns the conversion factor as numeric, not character.
A data frame with a name and description column, and two extra columns for the "ellps" and "datum" tags.
Loading the rgdal package may change the PROJ_LIB environmental variable to the PROJ.4 support files if bundled with binary packages.
getPROJ4VersionInfo()
#> [1] "Rel. 9.1.1, December 1st, 2022, [PJ_VERSION: 911]"
#> attr(,"short")
#> [1] 911
projInfo()
#> name
#> 1 adams_hemi
#> 2 adams_ws1
#> 3 adams_ws2
#> 4 aea
#> 5 aeqd
#> 6 affine
#> 7 airy
#> 8 aitoff
#> 9 alsk
#> 10 apian
#> 11 august
#> 12 axisswap
#> 13 bacon
#> 14 bertin1953
#> 15 bipc
#> 16 boggs
#> 17 bonne
#> 18 calcofi
#> 19 cart
#> 20 cass
#> 21 cc
#> 22 ccon
#> 23 cea
#> 24 chamb
#> 25 collg
#> 26 col_urban
#> 27 comill
#> 28 crast
#> 29 defmodel
#> 30 deformation
#> 31 denoy
#> 32 eck1
#> 33 eck2
#> 34 eck3
#> 35 eck4
#> 36 eck5
#> 37 eck6
#> 38 eqearth
#> 39 eqc
#> 40 eqdc
#> 41 euler
#> 42 etmerc
#> 43 fahey
#> 44 fouc
#> 45 fouc_s
#> 46 gall
#> 47 geoc
#> 48 geogoffset
#> 49 geos
#> 50 gins8
#> 51 gn_sinu
#> 52 gnom
#> 53 goode
#> 54 gs48
#> 55 gs50
#> 56 guyou
#> 57 hammer
#> 58 hatano
#> 59 healpix
#> 60 rhealpix
#> 61 helmert
#> 62 hgridshift
#> 63 horner
#> 64 igh
#> 65 igh_o
#> 66 imoll
#> 67 imoll_o
#> 68 imw_p
#> 69 isea
#> 70 kav5
#> 71 kav7
#> 72 krovak
#> 73 labrd
#> 74 laea
#> 75 lagrng
#> 76 larr
#> 77 lask
#> 78 lonlat
#> 79 latlon
#> 80 lcc
#> 81 lcca
#> 82 leac
#> 83 lee_os
#> 84 loxim
#> 85 lsat
#> 86 mbt_s
#> 87 mbt_fps
#> 88 mbtfpp
#> 89 mbtfpq
#> 90 mbtfps
#> 91 merc
#> 92 mil_os
#> 93 mill
#> 94 misrsom
#> 95 moll
#> 96 molobadekas
#> 97 molodensky
#> 98 murd1
#> 99 murd2
#> 100 murd3
#> 101 natearth
#> 102 natearth2
#> 103 nell
#> 104 nell_h
#> 105 nicol
#> 106 nsper
#> 107 nzmg
#> 108 noop
#> 109 ob_tran
#> 110 ocea
#> 111 oea
#> 112 omerc
#> 113 ortel
#> 114 ortho
#> 115 pconic
#> 116 patterson
#> 117 peirce_q
#> 118 pipeline
#> 119 poly
#> 120 pop
#> 121 push
#> 122 putp1
#> 123 putp2
#> 124 putp3
#> 125 putp3p
#> 126 putp4p
#> 127 putp5
#> 128 putp5p
#> 129 putp6
#> 130 putp6p
#> 131 qua_aut
#> 132 qsc
#> 133 robin
#> 134 rouss
#> 135 rpoly
#> 136 s2
#> 137 sch
#> 138 set
#> 139 sinu
#> 140 somerc
#> 141 stere
#> 142 sterea
#> 143 gstmerc
#> 144 tcc
#> 145 tcea
#> 146 times
#> 147 tinshift
#> 148 tissot
#> 149 tmerc
#> 150 tobmerc
#> 151 topocentric
#> 152 tpeqd
#> 153 tpers
#> 154 unitconvert
#> 155 ups
#> 156 urm5
#> 157 urmfps
#> 158 utm
#> 159 vandg
#> 160 vandg2
#> 161 vandg3
#> 162 vandg4
#> 163 vertoffset
#> 164 vitk1
#> 165 vgridshift
#> 166 wag1
#> 167 wag2
#> 168 wag3
#> 169 wag4
#> 170 wag5
#> 171 wag6
#> 172 wag7
#> 173 webmerc
#> 174 weren
#> 175 wink1
#> 176 wink2
#> 177 wintri
#> 178 xyzgridshift
#> description
#> 1 Adams Hemisphere in a Square
#> 2 Adams World in a Square I
#> 3 Adams World in a Square II
#> 4 Albers Equal Area
#> 5 Azimuthal Equidistant
#> 6 Affine transformation
#> 7 Airy
#> 8 Aitoff
#> 9 Modified Stereographic of Alaska
#> 10 Apian Globular I
#> 11 August Epicycloidal
#> 12 Axis ordering
#> 13 Bacon Globular
#> 14 Bertin 1953
#> 15 Bipolar conic of western hemisphere
#> 16 Boggs Eumorphic
#> 17 Bonne (Werner lat_1=90)
#> 18 Cal Coop Ocean Fish Invest Lines/Stations
#> 19 Geodetic/cartesian conversions
#> 20 Cassini
#> 21 Central Cylindrical
#> 22 Central Conic
#> 23 Equal Area Cylindrical
#> 24 Chamberlin Trimetric
#> 25 Collignon
#> 26 Colombia Urban
#> 27 Compact Miller
#> 28 Craster Parabolic (Putnins P4)
#> 29 Deformation model
#> 30 Kinematic grid shift
#> 31 Denoyer Semi-Elliptical
#> 32 Eckert I
#> 33 Eckert II
#> 34 Eckert III
#> 35 Eckert IV
#> 36 Eckert V
#> 37 Eckert VI
#> 38 Equal Earth
#> 39 Equidistant Cylindrical (Plate Carree)
#> 40 Equidistant Conic
#> 41 Euler
#> 42 Extended Transverse Mercator
#> 43 Fahey
#> 44 Foucaut
#> 45 Foucaut Sinusoidal
#> 46 Gall (Gall Stereographic)
#> 47 Geocentric Latitude
#> 48 Geographic Offset
#> 49 Geostationary Satellite View
#> 50 Ginsburg VIII (TsNIIGAiK)
#> 51 General Sinusoidal Series
#> 52 Gnomonic
#> 53 Goode Homolosine
#> 54 Modified Stereographic of 48 U.S.
#> 55 Modified Stereographic of 50 U.S.
#> 56 Guyou
#> 57 Hammer & Eckert-Greifendorff
#> 58 Hatano Asymmetrical Equal Area
#> 59 HEALPix
#> 60 rHEALPix
#> 61 3(6)-, 4(8)- and 7(14)-parameter Helmert shift
#> 62 Horizontal grid shift
#> 63 Horner polynomial evaluation
#> 64 Interrupted Goode Homolosine
#> 65 Interrupted Goode Homolosine Oceanic View
#> 66 Interrupted Mollweide
#> 67 Interrupted Mollweide Oceanic View
#> 68 International Map of the World Polyconic
#> 69 Icosahedral Snyder Equal Area
#> 70 Kavrayskiy V
#> 71 Kavrayskiy VII
#> 72 Krovak
#> 73 Laborde
#> 74 Lambert Azimuthal Equal Area
#> 75 Lagrange
#> 76 Larrivee
#> 77 Laskowski
#> 78 Lat/long (Geodetic)
#> 79 Lat/long (Geodetic alias)
#> 80 Lambert Conformal Conic
#> 81 Lambert Conformal Conic Alternative
#> 82 Lambert Equal Area Conic
#> 83 Lee Oblated Stereographic
#> 84 Loximuthal
#> 85 Space oblique for LANDSAT
#> 86 McBryde-Thomas Flat-Polar Sine (No. 1)
#> 87 McBryde-Thomas Flat-Pole Sine (No. 2)
#> 88 McBride-Thomas Flat-Polar Parabolic
#> 89 McBryde-Thomas Flat-Polar Quartic
#> 90 McBryde-Thomas Flat-Polar Sinusoidal
#> 91 Mercator
#> 92 Miller Oblated Stereographic
#> 93 Miller Cylindrical
#> 94 Space oblique for MISR
#> 95 Mollweide
#> 96 Molodensky-Badekas transformation
#> 97 Molodensky transform
#> 98 Murdoch I
#> 99 Murdoch II
#> 100 Murdoch III
#> 101 Natural Earth
#> 102 Natural Earth 2
#> 103 Nell
#> 104 Nell-Hammer
#> 105 Nicolosi Globular
#> 106 Near-sided perspective
#> 107 New Zealand Map Grid
#> 108 No operation
#> 109 General Oblique Transformation
#> 110 Oblique Cylindrical Equal Area
#> 111 Oblated Equal Area
#> 112 Oblique Mercator
#> 113 Ortelius Oval
#> 114 Orthographic
#> 115 Perspective Conic
#> 116 Patterson Cylindrical
#> 117 Peirce Quincuncial
#> 118 Transformation pipeline manager
#> 119 Polyconic (American)
#> 120 Retrieve coordinate value from pipeline stack
#> 121 Save coordinate value on pipeline stack
#> 122 Putnins P1
#> 123 Putnins P2
#> 124 Putnins P3
#> 125 Putnins P3'
#> 126 Putnins P4'
#> 127 Putnins P5
#> 128 Putnins P5'
#> 129 Putnins P6
#> 130 Putnins P6'
#> 131 Quartic Authalic
#> 132 Quadrilateralized Spherical Cube
#> 133 Robinson
#> 134 Roussilhe Stereographic
#> 135 Rectangular Polyconic
#> 136 S2
#> 137 Spherical Cross-track Height
#> 138 Set coordinate value
#> 139 Sinusoidal (Sanson-Flamsteed)
#> 140 Swiss. Obl. Mercator
#> 141 Stereographic
#> 142 Oblique Stereographic Alternative
#> 143 Gauss-Schreiber Transverse Mercator (aka Gauss-Laborde Reunion)
#> 144 Transverse Central Cylindrical
#> 145 Transverse Cylindrical Equal Area
#> 146 Times
#> 147 Triangulation based transformation
#> 148 Tissot
#> 149 Transverse Mercator
#> 150 Tobler-Mercator
#> 151 Geocentric/Topocentric conversion
#> 152 Two Point Equidistant
#> 153 Tilted perspective
#> 154 Unit conversion
#> 155 Universal Polar Stereographic
#> 156 Urmaev V
#> 157 Urmaev Flat-Polar Sinusoidal
#> 158 Universal Transverse Mercator (UTM)
#> 159 van der Grinten (I)
#> 160 van der Grinten II
#> 161 van der Grinten III
#> 162 van der Grinten IV
#> 163 Vertical Offset and Slope
#> 164 Vitkovsky I
#> 165 Vertical grid shift
#> 166 Wagner I (Kavrayskiy VI)
#> 167 Wagner II
#> 168 Wagner III
#> 169 Wagner IV
#> 170 Wagner V
#> 171 Wagner VI
#> 172 Wagner VII
#> 173 Web Mercator / Pseudo Mercator
#> 174 Werenskiold I
#> 175 Winkel I
#> 176 Winkel II
#> 177 Winkel Tripel
#> 178 Geocentric grid shift
projInfo("ellps")
#> name major ell
#> 1 MERIT a=6378137.0 rf=298.257
#> 2 SGS85 a=6378136.0 rf=298.257
#> 3 GRS80 a=6378137.0 rf=298.257222101
#> 4 IAU76 a=6378140.0 rf=298.257
#> 5 airy a=6377563.396 rf=299.3249646
#> 6 APL4.9 a=6378137.0 rf=298.25
#> 7 NWL9D a=6378145.0 rf=298.25
#> 8 mod_airy a=6377340.189 b=6356034.446
#> 9 andrae a=6377104.43 rf=300.0
#> 10 danish a=6377019.2563 rf=300.0
#> 11 aust_SA a=6378160.0 rf=298.25
#> 12 GRS67 a=6378160.0 rf=298.2471674270
#> 13 GSK2011 a=6378136.5 rf=298.2564151
#> 14 bessel a=6377397.155 rf=299.1528128
#> 15 bess_nam a=6377483.865 rf=299.1528128
#> 16 clrk66 a=6378206.4 b=6356583.8
#> 17 clrk80 a=6378249.145 rf=293.4663
#> 18 clrk80ign a=6378249.2 rf=293.4660212936269
#> 19 CPM a=6375738.7 rf=334.29
#> 20 delmbr a=6376428. rf=311.5
#> 21 engelis a=6378136.05 rf=298.2566
#> 22 evrst30 a=6377276.345 rf=300.8017
#> 23 evrst48 a=6377304.063 rf=300.8017
#> 24 evrst56 a=6377301.243 rf=300.8017
#> 25 evrst69 a=6377295.664 rf=300.8017
#> 26 evrstSS a=6377298.556 rf=300.8017
#> 27 fschr60 a=6378166. rf=298.3
#> 28 fschr60m a=6378155. rf=298.3
#> 29 fschr68 a=6378150. rf=298.3
#> 30 helmert a=6378200. rf=298.3
#> 31 hough a=6378270.0 rf=297.
#> 32 intl a=6378388.0 rf=297.
#> 33 krass a=6378245.0 rf=298.3
#> 34 kaula a=6378163. rf=298.24
#> 35 lerch a=6378139. rf=298.257
#> 36 mprts a=6397300. rf=191.
#> 37 new_intl a=6378157.5 b=6356772.2
#> 38 plessis a=6376523. b=6355863.
#> 39 PZ90 a=6378136.0 rf=298.25784
#> 40 SEasia a=6378155.0 b=6356773.3205
#> 41 walbeck a=6376896.0 b=6355834.8467
#> 42 WGS60 a=6378165.0 rf=298.3
#> 43 WGS66 a=6378145.0 rf=298.25
#> 44 WGS72 a=6378135.0 rf=298.26
#> 45 WGS84 a=6378137.0 rf=298.257223563
#> 46 sphere a=6370997.0 b=6370997.0
#> description
#> 1 MERIT 1983
#> 2 Soviet Geodetic System 85
#> 3 GRS 1980(IUGG, 1980)
#> 4 IAU 1976
#> 5 Airy 1830
#> 6 Appl. Physics. 1965
#> 7 Naval Weapons Lab., 1965
#> 8 Modified Airy
#> 9 Andrae 1876 (Den., Iclnd.)
#> 10 Andrae 1876 (Denmark, Iceland)
#> 11 Australian Natl & S. Amer. 1969
#> 12 GRS 67(IUGG 1967)
#> 13 GSK-2011
#> 14 Bessel 1841
#> 15 Bessel 1841 (Namibia)
#> 16 Clarke 1866
#> 17 Clarke 1880 mod.
#> 18 Clarke 1880 (IGN).
#> 19 Comm. des Poids et Mesures 1799
#> 20 Delambre 1810 (Belgium)
#> 21 Engelis 1985
#> 22 Everest 1830
#> 23 Everest 1948
#> 24 Everest 1956
#> 25 Everest 1969
#> 26 Everest (Sabah & Sarawak)
#> 27 Fischer (Mercury Datum) 1960
#> 28 Modified Fischer 1960
#> 29 Fischer 1968
#> 30 Helmert 1906
#> 31 Hough
#> 32 International 1924 (Hayford 1909, 1910)
#> 33 Krassovsky, 1942
#> 34 Kaula 1961
#> 35 Lerch 1979
#> 36 Maupertius 1738
#> 37 New International 1967
#> 38 Plessis 1817 (France)
#> 39 PZ-90
#> 40 Southeast Asia
#> 41 Walbeck
#> 42 WGS 60
#> 43 WGS 66
#> 44 WGS 72
#> 45 WGS 84
#> 46 Normal Sphere (r=6370997)
projInfo("units")
#> id to_meter name
#> 1 mm 1.000000e-03 millimetre
#> 2 cm 1.000000e-02 centimetre
#> 3 m 1.000000e+00 metre
#> 4 ft 3.048000e-01 foot
#> 5 us-ft 3.048006e-01 US survey foot
#> 6 fath 1.828800e+00 fathom
#> 7 kmi 1.852000e+03 nautical mile
#> 8 us-ch 2.011684e+01 US survey chain
#> 9 us-mi 1.609347e+03 US survey mile
#> 10 km 1.000000e+03 kilometre
#> 11 ind-ft 3.047984e-01 Indian foot (1937)
#> 12 ind-yd 9.143952e-01 Indian yard (1937)
#> 13 mi 1.609344e+03 Statute mile
#> 14 yd 9.144000e-01 yard
#> 15 ch 2.011680e+01 chain
#> 16 link 2.011680e-01 link
#> 17 dm 1.000000e-02 decimeter
#> 18 in 2.540000e-02 inch
#> 19 ind-ch 2.011670e+01 Indian chain
#> 20 us-in 2.540005e-02 US survey inch
#> 21 us-yd 9.144018e-01 US survey yard