Hello,<br><br>I'm trying to transform a geometry in SAD69 (srid 4291) to WGS84 (4326). The problem which occurs is an error<br><br>ERRO: transform: couldn't project point: -45 (geocentric transformation missing z or ellps)
<br><br>I've looked for a possible solution of this problem and I saw someone with the same problem at <br><a href="http://postgis.refractions.net/pipermail/postgis-users/2006-October/013565.html">http://postgis.refractions.net/pipermail/postgis-users/2006-October/013565.html
</a><br>And he found a solution at<br><a href="http://postgis.refractions.net/pipermail/postgis-users/2006-October/013570.html">http://postgis.refractions.net/pipermail/postgis-users/2006-October/013570.html</a><br>He discovered the variables of datum conversion for Belgian national grid which is 31370, but I have no idea what should I do to know this variables to my SAD69 system since my attribute proj4text in spatial_ref_sys has no mention to the variable towgs84.
<br>Can someone help me to discover how can I make this conversion?<br><br>Thanks in advance,<br><br>Felipe Costa<br>SIGLAB - INPA<br>Manaus - AM - Brazil<br>