if you want to give it a try with raster layers and selection, change in incphp/xajax/x_select.php, line 94 from if ($mapLayer->type < 3 && ... to if ($mapLayer->type < 4 && ...
You should turn off highlighting in the XML config file to avoid errors. armin On 11/25/2013 08:58 PM, Chris Jackson wrote: > Hi Armin > > Been off-grid for a bit, thanks for clarifying. I appreciate it is > selection of pixels, this may be still useful in some situations for > smaller local areas. I am dealing with model outputs (to date mainly > rectilinear->polygon features), though may now be dealing with rasterised > flexi-mesh grids instead and trying to maintain the level of data > accessibility where possible. I wonder whether I need to grab selection > extents and query a separate points feature class instead. > > Cheers > Chris > > > On 22 November 2013 18:17, Armin Burger <armin.bur...@gmail.com> wrote: > >> On 11/22/2013 02:38 PM, Chris Jackson wrote: >>> Hi all >>> >>> I got the old Corine geotiff raster sample working with the usual select >> by >>> click tool, but it doesn't work using select by rectangle (doesn't appear >>> on the list of layers to choose). >>> >>> Is this by design or me just missing some configuration? Can it be done? >>> >> >> by design. You'd definitively not want a select on raster data, and it >> wouldn't make much sense either. See >> http://mapserver.org/input/raster.html#raster-query >> and especially the sentence "Raster queries on raster layers return one >> point feature for each pixel matching the query". >> >> So a single feature is a pixel, not the pixels belonging to a class and >> separated from other classes. If your selections are e.g. 5000 pixels >> you would get 5000 records back to display, all with the same values... >> and you'd need to create 5000 points for the highlighting layer. Also, >> one would expect the full area of a homogeneous class block to be >> treated as a single feature (like a single polygon) and selected >> altogether, which is not feasible since every pixel is an independent. >> >> Think about a global vegetation raster layer, just 10000 by 5000 pixels >> which is not really much (e.g. a Tiff with 150 MB). If a user selects >> the whole world you'd select roughly 0.3 * 10000 * 5000 pixels and their >> values to be read pixel by pixel... >> >> >> ------------------------------------------------------------------------------ >> Shape the Mobile Experience: Free Subscription >> Software experts and developers: Be at the forefront of tech innovation. >> Intel(R) Software Adrenaline delivers strategic insight and game-changing >> conversations that shape the rapidly evolving mobile landscape. Sign up >> now. >> http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk >> _______________________________________________ >> pmapper-users mailing list >> pmapper-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/pmapper-users >> > ------------------------------------------------------------------------------ > Shape the Mobile Experience: Free Subscription > Software experts and developers: Be at the forefront of tech innovation. > Intel(R) Software Adrenaline delivers strategic insight and game-changing > conversations that shape the rapidly evolving mobile landscape. Sign up now. > http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk > _______________________________________________ > pmapper-users mailing list > pmapper-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pmapper-users > ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ pmapper-users mailing list pmapper-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pmapper-users
