[GRASS-user] grass 7.2 3D voxel display - first time issues

[Anna Petrášová]

On Fri, Jun 10, 2016 at 5:43 AM, Robert Kuszinger <kuszinger at giscom.hu> wrote:
>
> Hi all,
>
> It seem I'm not able to see my beloved voxel model. This is my first
> experiment.
>
> Input: raster layers generated from vector and I made them a voxel.
> Result raster 3d metadata is at the end of this message. Also region in
> which it was created.
> My rasters serving as base seem to be ok (I displayed them as raster
> surfaces in 3D display mode, only a few of them to check, image attached).
>
> What to do to make them visible?
>
> I've tried isosurface and played around with slices but I'm not able to see
> anything.
> 2D mode shows nothing. Map extent, location is ok...
> I just can't figure out what is missing. Color table for 3D raster is blue
> only (values from -1000 to 1000 set to blue, nv=white)

not sure what's going on, I was using voxels recently. I found
sometimes there is a problem that slices are drawn white and
isosurfaces not at all, but if I reopen GUI, the problem went away.

Anna

>
> thanks
> Robert
>
>
>
> g.region -p3
> projection: 99 (Swiss. Obl. Mercator)
> zone:       0
> datum:      ** unknown (default: WGS84) **
> ellipsoid:  grs67
> north:      267188.884502
> south:      266707.900494
> west:       656852.944339
> east:       657580.707724
> top:        352.00000000
> bottom:     102.00000000
> nsres:      10.02050017
> nsres3:     10.02050017
> ewres:      9.96936144
> ewres3:     9.96936144
> tbres:      10
> rows:       48
> rows3:      48
> cols:       73
> cols3:      73
> depths:     25
> cells:      3504
> cells3:     87600
>
> r3.info map=3dtest at Duna
>
> +----------------------------------------------------------------------------+
>  | Layer:    3dtest at Duna                    Date: Tue Jun  7 14:19:11 2016
> |
>  | Mapset:   Duna                           Login of Creator: kuszi
> |
>  | Location: HungaryEOV
> |
>  | DataBase: /home/kuszi/grassdata
> |
>  | Title:    3dtest
> |
>  | Units:    none
> |
>  | Vertical unit: units
> |
>  | Timestamp: none
> |
>
> |----------------------------------------------------------------------------|
>  |
> |
>  |   Type of Map:  raster_3d            Number of Categories: 0
> |
>  |   Data Type:    DCELL
> |
>  |   Rows:         48
> |
>  |   Columns:      73
> |
>  |   Depths:       25
> |
>  |   Total Cells:  87600
> |
>  |   Total size:           43442 Bytes
> |
>  |   Number of tiles:      27
> |
>  |   Mean tile size:       1608 Bytes
> |
>  |   Tile size in memory:  28800 Bytes
> |
>  |   Number of tiles in x, y and  z:   3, 3, 3
> |
>  |   Dimension of a tile in x, y, z:   25, 16, 9
> |
>  |
> |
>  |        Projection: Swiss. Obl. Mercator (zone 0)
> |
>  |            N: 267188.884502    S: 266707.900494   Res: 10.02050017
> |
>  |            E: 657580.707724    W: 656852.944339   Res: 9.96936144
> |
>  |            T:        352    B:        102   Res:    10
> |
>  |   Range of data:   min =          1 max =         25
> |
>  |
> |
>  |   Data Source:
> |
>  |
> |
>  |
> |
>  |
> |
>  |   Data Description:
> |
>  |    generated by r.to.rast3
> |
>  |
> |
>  |   Comments:
> |
>  |    r.to.rast3 --overwrite input="l_00001_buf_diss,l_00002_buf_diss,l_00\
> |
>  |    003_buf_diss,l_00004_buf_diss,l_00005_buf_diss,l_00006_buf_diss,l_00\
> |
>  |    007_buf_diss,l_00008_buf_diss,l_00009_buf_diss,l_00010_buf_diss,l_00\
> |
>  |    011_buf_diss,l_00012_buf_diss,l_00013_buf_diss,l_00014_buf_diss,l_00\
> |
>  |    015_buf_diss,l_00016_buf_diss,l_00017_buf_diss,l_00018_buf_diss,l_00\
> |
>  |    019_buf_diss,l_00020_buf_diss,l_00021_buf_diss,l_00022_buf_diss,l_00\
> |
>  |    023_buf_diss,l_00024_buf_diss,l_00025_buf_diss" output="3dtest" tile\
> |
>  |    size=32
> |
>  |
> |
>
> +----------------------------------------------------------------------------+
> VERSION INFO:
> GRASS 7.2.svn (2016)
>  ./configure  --prefix=/opt --exec_prefix=/opt/grass72
> --with-freetype-includes=/usr/include/freetype2 --with-blas --with-lapack
> --with-geos --with-liblas --with-nls --with-netcdf --with-odbc --with-openmp
> --with-pthread --with-postgres --with-python=/usr/bin/python2-config
> --with-readline --with-wxwidgets=/usr/bin/wx-config-2.8
> libgis Revision: 67364
> libgis Date: 2015-12-24 07:07:44 -0800 (Thu, 24 Dec 2015)
> PROJ.4: 4.9.2
> GDAL/OGR: 2.1.0
> GEOS: 3.5.0
> SQLite: 3.13.0
>
>
>
>
>
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