On Feb 22, 2012, at 8:42 AM, tim martin wrote:

> Hi Donovan and board
>
> Yes that Tim Sutton tutorial is very good.
>
> I also found this one
>
> http://dirkraffel.com/2011/07/05/best-way-to-merge-color-relief-with-shaded-relief-map/
>
>
>
> I ended up following this procedure and it has worked v well. I just setup a
> loop to use ImageMagik and combine the two images. And then reapplied the
> georeferencing using gdal_translate + world file.
>
> Thanks to all helped, it has made me aware of lots of other options that I
> may use in the future
>
> thanks again
>
> Tim

another option is ossim see

http://trac.osgeo.org/ossim/wiki/ossim-dem

Norman

>
> On 21 February 2012 19:52, Donovan Cameron <sault.don@xxxxxxxxx> wrote:
> Have you reviewed the article from Tim Sutton: "A workflow for creating
> beautiful relief shaded dems using GDAL"[1]?
>
> It has some valuable pointers.
>
> [1]
> http://linfiniti.com/2010/12/a-workflow-for-creating-beautiful-relief-shaded-dems-using-gdal/
>
>
>
>
>
> Donovan
>
> On Tue, Feb 21, 2012 at 12:29 PM, Joaquim Luis <jluis@xxxxxxx> wrote:
>
>
> 5) Looked at GMT and I cannot find the options to load two rasters on top of
> each other.
>
> Tim,
>
> 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
>
>
> 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.
>
> http://gmt.soest.hawaii.edu/gmt/html/GMT_Docs.html#x1-1300007.5
>
>
> 6) MIRONE - again cannot see how to do this from within the application.
>
> 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.
> Anyway, here is a step-by-step example
> https://sites.google.com/site/mironehowtos/basic/shade-illuminations
>
>
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