<html>
<head>
<style><!--
.hmmessage P
{
margin:0px;
padding:0px
}
body.hmmessage
{
font-size: 10pt;
font-family:Tahoma
}
--></style>
</head>
<body class='hmmessage'>
<br><font style="" color="#000000"><br></font>
<meta http-equiv="Content-Type" content="text/html; charset=unicode"><font style="" color="#000000">
</font><meta name="Generator" content="Microsoft SafeHTML">
<style>
.ExternalClass .ecxhmmessage P
{padding:0px;}
.ExternalClass body.ecxhmmessage
{font-size:10pt;font-family:Tahoma;</style><font style="" color="#000000">Hello everyone!!</font><font style="" color="#000000"><br></font><font style="" color="#000000"><br></font><font style="" color="#000000">I </font><font style="font-size: 10pt;" class="ecxApple-style-span" color="#000000" size="2"><span class="ecxApple-style-span" style="font-size:13px"><font style="" class="ecxApple-style-span">converted </font></span></font><font style="" color="#000000">a DXF file to a shapefile using 'ogr2ogr' command. When I use the "-t_srs" parameter the system </font><font style="font-size: 10pt;" class="ecxApple-style-span" color="#000000" size="2"><span class="ecxApple-style-span" style="font-size:13px"><font style="" class="ecxApple-style-span">tells</font> </span></font><font style="" color="#000000">me: "Can't transform coordinates, source layer has no coordinate system. Use -s_srs to set one."</font><font style="" color="#000000"><br></font><font style="" color="#000000"><br></font><font style="" color="#000000">The command '-s_srs' override source SRS. What is the difference between '-s_srs' and '-a_srs' command? What is the exact meaning of "Assign an output SRS"? I don't understand that.</font><font style="" color="#000000"><br></font><font style="" color="#000000"><br></font><font style="" color="#000000">I use the '-s_srs' command and when I overlay the shapefile over a map,</font><font style="font-size: 10pt;" class="ecxApple-style-span" color="#000000" size="2"><span class="ecxApple-style-span" style="font-size:13px"><font style="" class="ecxApple-style-span">the adjustment isnīt very good with the map</font></span></font><font style="" color="#000000">, so I must make a geographic transformation. I get that transformation thanks to 'ProjectionUtility' (ArcView). Its name is Geocentric[9603], ED_1950_TO_WGS_1984_13, POSC Code:8045.</font><font style="" color="#000000"><br></font><font style="" color="#000000"><br></font><font style="" color="#000000">I need to make this transformation automatically. How can I make this transformation using 'ogr2ogr'? Is it possible?</font><font style="" color="#000000"><br></font><font style="" color="#000000"><br></font><font style="" color="#000000">Thank you very much</font><br><br> </body>
</html>