<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thank you markus, you're right, there's no datum definition:<div><br></div><div><div>GRASS 6.3.0 (fassaGB):~ > g.proj -w</div><div>PROJCS["Transverse Mercator",</div><div> GEOGCS["international",</div><div> DATUM["unknown",</div><div> SPHEROID["International_1924",6378388,297]],</div><div> PRIMEM["Greenwich",0],</div><div> UNIT["degree",0.0174532925199433]],</div><div> PROJECTION["Transverse_Mercator"],</div><div> PARAMETER["latitude_of_origin",0],</div><div> PARAMETER["central_meridian",9],</div><div> PARAMETER["scale_factor",0.9996],</div><div> PARAMETER["false_easting",1500000],</div><div> PARAMETER["false_northing",0],</div><div> UNIT["Meter",1]]</div><div><br></div><div>but this is beacause I created a new location from the GUI start panel of GRASS by choosing the "EPSG code" button and selectiong the 3003 code which should be the one related to the GaussBoaga, Rome 1940 Monte Mario projections.</div><div><br></div><div>Where am I wrong? It is not possible to create such a new location only by choosing the EPSG code?</div><div><br></div><div>Thank you for helping me.</div><div><br></div><div>Christian Tiso </div><div><br></div><div><br></div><div><br><div><div>Il giorno 26/feb/09, alle ore 00:19, Markus Neteler ha scritto:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>On Wed, Feb 25, 2009 at 5:02 PM, Christian Tiso<br><<a href="mailto:christian.tiso@ing.unitn.it">christian.tiso@ing.unitn.it</a>> wrote:<br><blockquote type="cite">Hi,<br></blockquote><blockquote type="cite">using command r.proj to reproject a raster topographic map from a Gauss<br></blockquote><blockquote type="cite">Boaga location (EPSG:3003) to a UTM location (EPSG:32632) I obtain a shift<br></blockquote><blockquote type="cite">error of the reprojected map of about 40-50m in south direction. It is<br></blockquote><blockquote type="cite">related to the towgs84 bursa wolf parameters?<br></blockquote><blockquote type="cite">Is this a known bug?<br></blockquote><blockquote type="cite">I'm using Grass 6.3.0-2 on a Mac Intel with Moretti's Build binaries.<br></blockquote><br>please post<br><br>g.proj -w<br><br>I assume that the datum definition is lacking or wrong (towgs84).<br><br>Markus<br></div></blockquote></div><br><div> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br>Christian Tiso, collaborator<br><br>Department of Civil and Environmental Engineering<br>University of Trento<br>via Mesiano 77, I-38050 Trento, ITALY<br><a href="http://www.ing.unitn.it/dica">http://www.ing.unitn.it/dica</a><br>phone: +39 0461 882610<br>fax: +39 0461 882672<br>E-mail: <a href="mailto:christian.tiso@ing.unitn.it">christian.tiso@ing.unitn.it</a><br>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</div><div><br class="webkit-block-placeholder"></div></div></span><br class="Apple-interchange-newline"> </div><br></div></div></body></html>