Have you reviewed the article from Tim Sutton: "A workflow for creating beautiful relief shaded dems using GDAL"[1]?<div><br>It has some valuable pointers.<br><div><br></div><div>[1]
<a href="http://linfiniti.com/2010/12/a-workflow-for-creating-beautiful-relief-shaded-dems-using-gdal/">http://linfiniti.com/2010/12/a-workflow-for-creating-beautiful-relief-shaded-dems-using-gdal/</a> </div><div><br></div>
<div><br></div><div><br></div><div><br></div><div>Donovan<br><br><div class="gmail_quote">On Tue, Feb 21, 2012 at 12:29 PM, Joaquim Luis <span dir="ltr"><<a href="mailto:jluis@ualg.pt">jluis@ualg.pt</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"><br>
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5) Looked at GMT and I cannot find the options to load two rasters on top of each other.<br>
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Tim,<br>
<br>
You don't load the two grids on top of one-another. Illumination is NOT like transparency. It uses the gradients of the grid, projects it into the direction of light and than change the color in the HSV space (the S(aturation) component) and converts back to RGB<br>
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The links that I sent you have the scripts used to produce the figures. You can also look at this one for a very simple illumination in bw, but the procedure for color illumination is exactly the same.<br>
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<a href="http://gmt.soest.hawaii.edu/gmt/html/GMT_Docs.html#x1-1300007.5" target="_blank">http://gmt.soest.hawaii.edu/<u></u>gmt/html/GMT_Docs.html#x1-<u></u>1300007.5</a><div class="im"><br>
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<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
6) MIRONE - again cannot see how to do this from within the application.<br>
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Well, I can give you a 'click-recipe' if you want, but Mirone won't be able to deal with the such big grids as yours.<br>
Anyway, here is a step-by-step example<br>
<a href="https://sites.google.com/site/mironehowtos/basic/shade-illuminations" target="_blank">https://sites.google.com/site/<u></u>mironehowtos/basic/shade-<u></u>illuminations</a><div class="HOEnZb"><div class="h5"><br>
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