<DIV>Gerald,</DIV>
<DIV> </DIV>
<DIV>Thanks for responding.</DIV>
<DIV> </DIV>
<DIV>gdalwarptest is an application that is part of the GDAL (<A href="http://remotesensing.org/gdal/">http://remotesensing.org/gdal/</A>) project. gdalwarptest can be used to reproject a raster file. gdalwarptest seems to make use of the Proj4 library for its reprojection work.</DIV>
<DIV> </DIV>
<DIV>From your last sentence, I take it that (currently) there is not a PROJ projection formulation for the "projection" that I described. If I am correct, where would the new projection code be added; and is there a projection that is already coded that I could look at as an example?</DIV>
<DIV> </DIV>
<DIV>Thanks.</DIV>
<DIV> </DIV>
<DIV> Mike</DIV>
<DIV> </DIV>
<DIV><BR><B><I>"Gerald I. Evenden" <gerald.evenden@verizon.net></I></B> wrote:</DIV>
<DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid; WIDTH: 100%">What is "gdalwarptest?"<BR><BR>What you seem to be describing is the segmented global map divided<BR>into equatorial and polar regions. So? This is not the first time<BR>although the latitude of transition is normally further North & South.<BR><BR>Segmenting a map (a good example is the typical display of Goode's<BR>projection in most atlas' as well as in PROJ's manual is a graphical<BR>operation. Windowing and clipping of data into the segments is<BR>not a function of PROJ. PROJ is used only in projecting the data<BR>using unique initializations for each window segment.<BR><BR>For the rather bizarre polar regions, a PROJ projection would have<BR>to be developed mathematically and coded.<BR><BR>On Wed, 2003-07-30 at 11:04, a a wrote:<BR>> Hello.<BR>> <BR>> I would like gdalwarptest to be able to output files in a particular<BR>> "map projection". This list was
recommended as a forum where folks<BR>> might be able to suggest a suitable proj4 projection formulation.<BR>> <BR>> I've attached a jpeg to this email that might communicate what I am<BR>> thinking. I will try to describe it in words here. I want to<BR>> reproject any equirectangular raster data that is above 45 degrees<BR>> north or below 45 degrees south into a different "map projection". <BR>> That map projection is described by the two squares at the bottom of<BR>> the jpeg. If it is not clear from the jpeg what I am thinking, please<BR>> let me know and I will try to describe using more words.<BR>> <BR>> Thank you for your time.<BR>> <BR>> Mike<BR>> <BR>> <BR>> <BR>> ______________________________________________________________________<BR>> Do you Yahoo!?<BR>> Yahoo! SiteBuilder - Free, easy-to-use web site design software<BR>-- <BR>Gerald I. Evenden
<GERALD.EVENDEN@VERIZON.NET><BR><BR>----------------------------------------<BR>PROJ.4 Discussion List<BR>See http://www.remotesensing.org/proj for subscription, unsubscription<BR>and other information.</BLOCKQUOTE></DIV><p><hr SIZE=1>
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