To be able to transform spatial data to or from a projected system the Application Server must know how details about the projection. There are dozens of different projections that can be used and each of these projections can be configured with several parameters.
For transformations Redbex relies on the widely used proj4 projection library. Therefore the projection details that you have to define with a projected system have to be given as a proj4 configuration string. Documentation on these configuration strings can be found in the proj4 documentation. Please visit the proj4 homepage at http://proj.osgeo.org for more details.
There are several online resources that list the proj4 configuration strings for different projected coordinate systems. E.g. http://www.spatialreference.org/.
The projections supported by Redbex are listed in Table1.
Name of projection |
Proj4 proj setting name |
Albers Equal Area |
aea |
Azimuthal Equidistant |
aeqd |
Airy |
airy |
Aitoff |
aitoff |
Mod. Stererographics of Alaska |
alsk |
Apian Globular I |
apian |
August Epicycloidal |
august |
Bacon Globular |
bacon |
Bipolar conic of western hemisphere |
bipc |
Boggs Eumorphic |
boggs |
Bonne (Werner lat_1=90) |
bonne |
Cassini |
cass |
Central Cylindrical |
cc |
Equal Area Cylindrical |
cea |
Chamberlin Trimetric |
chamb |
Collignon |
collg |
Craster Parabolic (Putnins P4) |
crast |
Denoyer Semi-Elliptical |
denoy |
Eckert I |
eck1 |
Eckert II |
eck2 |
Eckert III |
eck3 |
Eckert IV |
eck4 |
Eckert V |
eck5 |
Eckert VI |
eck6 |
Equidistant Cylindrical (Plate Caree) |
eqc |
Equidistant Conic |
eqdc |
Euler |
euler |
Extended Transverse Mercator |
etmerc |
Fahey |
fahey |
Foucaut |
fouc |
Foucaut Sinusoidal |
fouc_s |
Gall (Gall Stereographic) |
gall |
Geostationary Satellite View |
geos |
Ginsburg VIII (TsNIIGAiK) |
gins8 |
General Sinusoidal Series |
gn_sinu |
Gnomonic |
gnom |
Goode Homolosine |
goode |
Mod. Stererographics of 48 U.S. |
gs48 |
Mod. Stererographics of 50 U.S. |
gs50 |
Hammer & Eckert-Greifendorff |
hammer |
Hatano Asymmetrical Equal Area |
hatano |
HEALPix |
healpix |
rHEALPix |
rhealpix |
Interrupted Goode Homolosine |
igh |
International Map of the World Polyconic |
imw_p |
Icosahedral Snyder Equal Area |
isea |
Kavraisky V |
kav5 |
Kavraisky VII |
kav7 |
Krovak |
krovak |
Laborde |
labrd |
Lambert Azimuthal Equal Area |
laea |
Lagrange |
lagrng |
Larrivee |
larr |
Laskowski |
lask |
Lambert Conformal Conic |
lcc |
Lambert Conformal Conic Alternative |
lcca |
Lambert Equal Area Conic |
leac |
Lee Oblated Stereographic |
lee_os |
Loximuthal |
loxim |
Space oblique for LANDSAT |
lsat |
McBryde-Thomas Flat-Polar Sine (No. 1) |
mbt_s |
McBryde-Thomas Flat-Pole Sine (No. 2) |
mbt_fps |
McBride-Thomas Flat-Polar Parabolic |
mbtfpp |
McBryde-Thomas Flat-Polar Quartic |
mbtfpq |
McBryde-Thomas Flat-Polar Sinusoidal |
mbtfps |
Mercator |
merc |
Miller Oblated Stereographic |
mil_os |
Miller Cylindrical |
mill |
Mollweide |
moll |
Murdoch I |
murd1 |
Murdoch II |
murd2 |
Murdoch III |
murd3 |
Natural Earth |
natearth |
Nell |
nell |
Nell-Hammer |
nell_h |
Nicolosi Globular |
nicol |
Near-sided perspective |
nsper |
New Zealand Map Grid |
nzmg |
General Oblique Transformation |
ob_tran |
Oblique Cylindrical Equal Area |
ocea |
Oblated Equal Area |
oea |
Oblique Mercator |
omerc |
Ortelius Oval |
ortel |
Orthographic |
ortho |
Perspective Conic |
pconic |
Polyconic (American) |
poly |
Putnins P1 |
putp1 |
Putnins P2 |
putp2 |
Putnins P3 |
putp3 |
Putnins P3' |
putp3p |
Putnins P4' |
putp4p |
Putnins P5 |
putp5 |
Putnins P5' |
putp5p |
Putnins P6 |
putp6 |
Putnins P6' |
putp6p |
Quartic Authalic |
qua_aut |
Robinson |
robin |
Roussilhe Stereographic |
rouss |
Rectangular Polyconic |
rpoly |
Sinusoidal (Sanson-Flamsteed) |
sinu |
Swiss. Obl. Mercator |
somerc |
Stereographic |
stere |
Oblique Stereographic Alternative |
sterea |
Gauss-Schreiber Transverse Mercator (aka Gauss-Laborde Reunion) |
gstmerc |
Transverse Central Cylindrical |
tcc |
Transverse Cylindrical Equal Area |
tcea |
Tissot |
tissot |
Transverse Mercator |
tmerc |
Two Point Equidistant |
tpeqd |
Tilted perspective |
tpers |
Universal Polar Stereographic |
ups |
Urmaev V |
urm5 |
Urmaev Flat-Polar Sinusoidal |
urmfps |
Universal Transverse Mercator (UTM) |
utm |
van der Grinten (I) |
vandg |
van der Grinten II |
vandg2 |
van der Grinten III |
vandg3 |
van der Grinten IV |
vandg4 |
Vitkovsky I |
vitk1 |
Wagner I (Kavraisky VI) |
wag1 |
Wagner II |
wag2 |
Wagner III |
wag3 |
Wagner IV |
wag4 |
Wagner V |
wag5 |
Wagner VI |
wag6 |
Wagner VII |
wag7 |
Werenskiold I |
weren |
Winkel I |
wink1 |
Winkel II |
wink2 |
Winkel Tripel |
wintri |
Table 1: Supported projections
