[GRASS-dev] [GRASS-SVN] r62845 - in grass/trunk/scripts: . d.shadedmap r.shadedmap

Sun Nov 30 20:37:23 PST 2014

My thinking was that a relief map simulates the appearance of topographic relief through the use of ‘hill shading’ (to use the ESRI term).

You can “shade” the relief map made with r.relief or other psuedo relief maps, like an aspect map (can you shade a slope map in this way? Not sure what it would tell you visually) with a color map of some kind (hence r.shaded.relief). Or you can “drape” the color map over the relief map—perhaps “r.color.drape”.

There are other kinds of image fusion for sure. The goal is to use names that users can easily understand. If d.shade can shade something other than a relief map of some kind, then perhaps d.shade is best. If it mainly is for shading relief maps maps, d.shaded.relief might be better.

Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Head, Graduate Faculty in Complex Adaptive Systems Science
Arizona State University

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On Nov 30, 2014, at 7:54 PM, Vaclav Petras <wenzeslaus at gmail.com<mailto:wenzeslaus at gmail.com>> wrote:

On Sun, Nov 30, 2014 at 8:12 PM, Michael Barton <Michael.Barton at asu.edu<mailto:Michael.Barton at asu.edu>> wrote:
My idea is that changing r.shaded.relief -> r.relief allows us to use r/d.shaded.relief for relief maps that are colored by another variable (elevation, land-cover, etc).

I don't think this would be a good idea. r.relief (former r.shaded.relief) creates "shade from the (terrain) relief". r.shade (former r.shadedmap, and d.shade) allows to "put the shade on a colored/colorful raster" where both shade and raster can be anything. Shade can be e.g. aspect, slope or shade derived from the relief. I know this is probably clear but his was my thinking.

I didn't though about r.shade and r.relief names before you suggested them and I'm not 100% satisfied with r.relief because it is in fact not relief but shade from relief. However, I like the new names because they are short, there is no problem with using or not using the dot between words and they are distinct from each other.

Michael
____________________
C. Michael Barton
Director, Center for Social Dynamics & Complexity
Professor of Anthropology, School of Human Evolution & Social Change
Head, Graduate Faculty in Complex Adaptive Systems Science
Arizona State University

voice:  480-965-6262<tel:480-965-6262> (SHESC), 480-965-8130<tel:480-965-8130>/727-9746 (CSDC)
fax: 480-965-7671<tel:480-965-7671> (SHESC),  480-727-0709<tel:480-727-0709> (CSDC)
www: http://www.public.asu.edu/~cmbarton, http://csdc.asu.edu<http://csdc.asu.edu/>

On Nov 30, 2014, at 5:50 PM, grass-dev-request at lists.osgeo.org<mailto:grass-dev-request at lists.osgeo.org> wrote:

From: Vaclav Petras <wenzeslaus at gmail.com<mailto:wenzeslaus at gmail.com>>
Cc: GRASS developers list <grass-dev at lists.osgeo.org<mailto:grass-dev at lists.osgeo.org>>
To: Markus Neteler <neteler at osgeo.org<mailto:neteler at osgeo.org>>
Date: November 30, 2014 at 5:31:35 PM MST
Subject: Re: [GRASS-dev] [GRASS-SVN] r62845 - in grass/trunk/scripts: . d.shadedmap r.shadedmap

On Sat, Nov 29, 2014 at 9:43 AM, Vaclav Petras <wenzeslaus at gmail.com<mailto:wenzeslaus at gmail.com>> wrote:

On Sat, Nov 29, 2014 at 9:30 AM, Markus Neteler <neteler at osgeo.org<mailto:neteler at osgeo.org>> wrote:
On Sat, Nov 29, 2014 at 12:37 AM, Vaclav Petras <wenzeslaus at gmail.com<mailto:wenzeslaus at gmail.com>> wrote:
>
> On Fri, Nov 28, 2014 at 5:40 PM, Michael Barton <Michael.Barton at asu.edu<mailto:Michael.Barton at asu.edu>>
> wrote:
>>
>> Probably nothing to be done about this since r.shaded.relief goes back a
>> long time. But a more sensible renaming would have the script now called
>> r.chaded.relief renamed to simply r.relief. Then the modules that drape a
>> colored map onto a relief map could be called x.shaded.relief,
>> x.shadedrelief, or something like that.
>>
> That's an interesting option. I'm not sure if I like it but it's worth
> exploring. If we go even further we get:
>
> r.shaded.relief -> r.relief
> r.shadedmap -> r.shade
> d.shadedmap -> d.shade

... along with:
- r.blend

Yes, I like this list better than the current names of discussed modules.

So, if you like it, I can like it too and I will change it hopefully soon. Just to be sure: including r.shaded.relief -> r.relief?

r.shaded.relief -> r.relief
r.shadedmap -> r.shade
d.shadedmap -> d.shade

Done in r63305 with few other improvements.

Now I'm not sure with [rd].shade parameters. reliefmap and drapemap are not particularly explanatory. My idea was shade and color which is better when shade=slope compared to relief=slope. color=elevation is also quite understandable but of course it is quite unexpected that the color option is a raster map.

There is also one detail I'm not sure about. r.relief might be now missing one keyword and that is "shaded relief". "relief" should be there too but having also "shaded relief" distinguishes it from things like "local relief (model)".

http://trac.osgeo.org/grass/changeset/63305

Vaclav

Markus

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