On 09/20/2011 07:08 PM, J. Holden wrote: > This is somewhat off-topic to FlightGear, so I apologize - but I > respond to John Denker: Having looked over what you are trying to do, > I strongly recommend using QGIS with the GRASS plugin. > > Very rarely do I use any of GRASS' built-in visualization programs - > and very rarely do I use any of QGIS' built-in geospatial functions - > but QGIS is the best program I've found to visualize GRASS data at > the moment (with the possible, rare, exception of NVIZ). > > In fact, I believe the whole GRASS d.mon was rewritten as of GRASS 7 > and now works differently (and hopefully better). I think most of the > GRASS display functions were very, very old.
Yes, that helps. Thanks for the clue. One nice thing about GRASS is that it is very modular. In particular its backend computational features are independent of its frontend visualization features. The QGIS frontend graphics are orders of magnitude faster than the GRASS frontend graphics. Also QGIS has a feature called "recompute CRS on the fly" that simplifies a lot of things. It's nice to see a little bit of sanity in the world. Here are some questions you might be able to help me with, if you would be so kind. Off-list answers would be fine, although I suspect I'm not the only person who is interested: 1) GRASS has a "drape" feature implemented by d.his that sets the intensity from one raster and the hue from from another, which is a very nice way of combining slope information and elevation information into one image. It's not obvious how to achieve the "drape" effect in QGIS ... with or without involving GRASS. What's the trick? 2) GRASS has a "catlist" feature implemented by d.rast that makes it easy to display only a certain range of values, e.g. everything from 3000 feet on up. This is particularly slick in conjunction with item (1) above. I can always do this with r.mapcalc, but I was wondering if there might be a convenient way to do it on-the-fly. 3) I suspect that doing reprojections on the the fly only works for vector data. I tried it with raster data, expecting to see either a resulting image or an error message, but saw neither. Is there something I'm missing? 4) When defining a colormap, there does not appear to be any way of controlling transparency on a level-by-level basis. Am I overlooking something, or is this an actual limitation? ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
