<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html; charset=Windows-1252">
<META content="MSHTML 6.00.2800.1170" name=GENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV><FONT size=2>The coordinates in the sample are UTMs and the rectangle is a
rectangle, just rotated. I guess what I am looking for is a quick and easy way
to pull the subimage with a rotation applied, maybe.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>These are UTM's, but they really could be any kind of
coordinate.</FONT></DIV>
<BLOCKQUOTE dir=ltr
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=ed@topozone.com href="mailto:ed@topozone.com">Ed McNierney</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=gdal-dev@remotesensing.org
href="mailto:gdal-dev@remotesensing.org">gdal-dev@remotesensing.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, August 19, 2003 11:10
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> RE: [Gdal-dev] Warp /
rotation</DIV>
<DIV><BR></DIV>
<DIV><SPAN class=591090817-19082003><FONT face=Arial color=#0000ff size=2>Dear
Wizard -</FONT></SPAN></DIV>
<DIV><SPAN class=591090817-19082003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=591090817-19082003><FONT face=Arial color=#0000ff size=2>The
problem is that your "rectangle" isn't a rectangle! You seem to be
trying to reproject your image - can you describe the input and output
projections you're using? Those numbers make it look like your input
data might be in UTM (but it could certainly be something else), but what is
your desired output projection?</FONT></SPAN></DIV>
<DIV><SPAN class=591090817-19082003><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=591090817-19082003> <FONT face=Arial
color=#0000ff size=2>- Ed</FONT></SPAN></DIV>
<DIV><SPAN class=591090817-19082003>
<P><FONT size=2>Ed McNierney<BR>President and Chief Mapmaker<BR>TopoZone.com /
Maps a la carte, Inc.<BR>73 Princeton Street, Suite 305<BR>North Chelmsford,
MA 01863<BR>ed@topozone.com<BR>(978) 251-4242 </FONT></P></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Geographic Wizard
[mailto:geowiz@shaw.ca]<BR><B>Sent:</B> Tuesday, August 19, 2003 12:58
PM<BR><B>To:</B> gdal-dev@remotesensing.org<BR><B>Subject:</B> [Gdal-dev]
Warp / rotation<BR><BR></FONT></DIV>
<DIV>
<DIV><FONT size=2>
<DIV><FONT size=2>Hi, everybody</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>New to GDAL as well as using georeferenced raster images.
I am trying to figure out how to do the following, and any help / insight
would be greatly appreciated. I have put some numbers together as an example
:</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I have an image (tif/jpg/png) 5000 x 5000 that is georef
with a world file</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>2</FONT></DIV>
<DIV><FONT size=2>0</FONT></DIV>
<DIV><FONT size=2>0</FONT></DIV>
<DIV><FONT size=2>-2</FONT></DIV>
<DIV><FONT size=2>667500</FONT></DIV>
<DIV><FONT size=2>5864000</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I would like to pull a sub image of this that is bound by
a rectangle</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> 669273---------------------------
670898</FONT></DIV>
<DIV><FONT size=2>5862482--------------------------- 5862538</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> 669330---------------------------
670956</FONT></DIV>
<DIV><FONT size=2>5860859---------------------------5860910</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>I would like line # 1 of the sub-image to be along the top
boundary of the rectangle, therefore it needs to be rotated by about 2
degrees cw.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Any help would be appreciated.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Thanks,</FONT></DIV>
<DIV><FONT
size=2>Steve</FONT></DIV></FONT></DIV></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>