<html>
<head>
<meta http-equiv=Content-Type content="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered)">
<style>
<!--
/* Font Definitions */
@font-face
{font-family:"MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
@font-face
{font-family:"\@MS Mincho";
panose-1:2 2 6 9 4 2 5 8 3 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{font-family:Arial;
color:windowtext;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello. I am trying to convert some MrSID images into
Geotiffs and tiling them together. The MrSIDs are in state plane
coordinate system and I need them in WGS84. So I convert the MrSIDs to
geotiffs using mrsiddecode from lizard tech. Then I use gdal warp to change
the projection type. Then use gdal_merge to merge them together.
The problem is that I end up with a black collar when I warp the images and
then when I merge them the images cover each other up. Is there anyway, that
I can crop those collars out? Here is the link where I am getting the sids
<a
href="http://www.nysgis.state.ny.us/gateway/mg/2001/suffolk/01ic_t_babylon_l06col.htm">http://www.nysgis.state.ny.us/gateway/mg/2001/suffolk/01ic_t_babylon_l06col.htm</a>
</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Matt</span></font></p>
</div>
</body>
</html>