<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]--><o:SmartTagType
namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PlaceName"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="PlaceType"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="place"/>
<o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags"
name="PersonName"/>
<!--[if !mso]>
<style>
st1\:*{behavior:url(#default#ieooui) }
</style>
<![endif]-->
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";
color:black;}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:blue;
text-decoration:underline;}
p
{mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman";
color:black;}
pre
{margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
tt
{font-family:"Courier New";}
span.EmailStyle20
{mso-style-type:personal;
font-family:Arial;
color:navy;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:595.3pt 841.9pt;
margin:70.85pt 70.85pt 70.85pt 70.85pt;}
div.Section1
{page:Section1;}
-->
</style>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor=white lang=SV link=blue vlink=blue>
<div class=Section1>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>Hello again Zoltan.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>I wrote:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>> As a last resort, if you have
more examples of source and target points that are representative for your area
of interest,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>> one could use the SEVENPAR
program from Killetsoft to compute a local 3-parameter or 7-parameter transform.
<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>Actually, it is possible to use
Proj.4 to compute a local 3-parameter transformation from<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>your single test point, but I have
no idea how accurate it would be for the rest of your data.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>By assuming the same height above
the ellipsoids for your test point, I get the 3-parameter <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>transform<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'> </span></font><font
size=2 face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:
"Courier New"'>+towgs84=-144.47,-128.70,-288.68<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>which is tailor-made for your single
test point, so:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'> </span></font><font size=2
face="Courier New"><span lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'>>
cs2cs +proj=tmerc +lon_0=33 +a=6378249.145 +b=6356514.966398753 +towgs84=-144.47,-128.70,-288.68
+to +init=epsg:32736<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'> -49717.410
-2872274.540<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'> 450273.23
7128571.66 0.00<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
lang=EN-US style='font-size:10.0pt;font-family:"Courier New"'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>Best regards,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>Mikael Rittri<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>Carmenta<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>Sweden<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span style='font-size:
12.0pt;font-family:Arial'>http://www.carmenta.com<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
color=black face="Times New Roman"><span lang=EN-US style='font-size:12.0pt;
color:windowtext'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 color=black face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;color:windowtext;font-weight:bold'>From:</span></font></b><font
size=2 color=black face=Tahoma><span lang=EN-US style='font-size:10.0pt;
font-family:Tahoma;color:windowtext'> proj-bounces@lists.maptools.org
[mailto:proj-bounces@lists.maptools.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Mikael Rittri<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, August 28, 2012
4:20 PM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">PROJ.4
and general Projections Discussions</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [Proj] Gauss
conformal Lo33 on Clarke 1880 <st1:place w:st="on"><st1:PlaceType w:st="on">Cape</st1:PlaceType>
<st1:PlaceName w:st="on">Datum</st1:PlaceName></st1:place> to WGS84 UTM36S -
NTv2 file needed.</span></font><font color=black><span lang=EN-US
style='color:windowtext'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=3 color=black face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=black face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial'>Hello Zoltan, <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 color=navy face=Arial><span lang=EN-US
style='font-size:12.0pt;font-family:Arial;color:navy'>[-- text deleted, see <a
href="http://lists.maptools.org/pipermail/proj/2012-August/006408.html">http://lists.maptools.org/pipermail/proj/2012-August/006408.html</a>
--]<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3 color=black
face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'><o:p> </o:p></span></font></p>
</div>
</body>
</html>