The RSO projection method for Malaysia is now classified by <a href="http://epsg-registry.org" target="_blank">epsg-registry.org</a> as Hotine Oblique Mercator (variant A) EPSG:9812. This affects the following projections - EPSG:3168, EPSG:3375, EPSG:3376 among others.<div>
<br></div><div>At the moment, I get the following outputs from epsg_tr.py:</div><div><br></div><div>epsg_tr.py -proj4 3618 </div><div><div># Kertau (RSO) / RSO Malaya (m)</div><div><3168> +proj=omerc +lat_0=4 +lonc=102.25 +alpha=323.0257905 +k=0.99984 +x_0=804670.24 +y_0=0 +a=6377295.664 +b=6356094.667915204 +units=m +no_defs <></div>
</div><div><br></div><div>epsg_tr.py -proj4 3375</div><div><3375> +proj=omerc +lat_0=4 +lonc=102.25 +alpha=323.0257964666666 +k=0.99984 +x_0=804671 +y_0=0 +ellps=GRS80 +units=m +no_defs <></div><div><br></div>
<div>which are missing the +gamma parameter. This parameter (Rectified Grid Angle) is already included in the share/proj/epsg database:</div><div><br></div><div><div># Kertau (RSO) / RSO Malaya (m)</div></div><div><3168> +proj=omerc +lat_0=4 +lonc=102.25 +alpha=323.0257905 +k=0.99984 +x_0=804670.24 +y_0=0 +gamma=323.1301023611111 +a=6377295.664 +b=6356094.667915204 +units=m +no_defs <></div>
<div><br></div><div><div># GDM2000 / Peninsula RSO</div><div><3375> +proj=omerc +lat_0=4 +lonc=102.25 +alpha=323.0257964666666 +k=0.99984 +x_0=804671 +y_0=0 +gamma=323.1301023611111 +ellps=GRS80 +units=m +no_defs <></div>
</div><div><br></div><div>Can this parameter be added to these projections as it is being applied in the latest proj4 omerc.c?</div><div><br></div><div>Thanks</div><div><br clear="all"><span style="font-size:large"><i><font face="garamond, serif"><b><font color="#FF6600">Hilmy</font></b></font></i></span><br>
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