GRASS GIS Manual: wxGUI Animation tool

Note: This document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade, and read the current manual page.

wxGUI Animation tool

DESCRIPTION
NOTE
EXAMPLES
SEE ALSO
AUTHOR

DESCRIPTION

The Animation Tool is a wxGUI component for animating series of GRASS raster or vector maps or space time datasets (created by t.* modules).

Animation Tool allows you to:

display up to 4 synchronized animations
each animation can consist of base map layer(s) and (multiple) series in arbitrary order (for example, raising water level with elevation)
control the animation speed
interactively change active frame using a slider
visualize space time datasets with unequally spaced intervals
animate 3d view (partially implemented, not supported on Windows)
export animation as a series of images, animated GIF, AVI or SWF
choose format of time labels in case of animating maps with absolute time
choose background color
set starting and ending region in order to change region during animation (alternatively you can set N-S/E-W values instead of the ending region; these are used for making the region smaller or larger for each step)

3D view animation enables to animate raster (as an elevation map or a color map) or vector map (points, lines). Internally, module m.nviz.image is used. To display 3D view animation follow these steps:

open GRASS GUI, load maps and start 3D view
set view, light and other parameters as you like
save workspace file
add new animation in Animation Tool, choose 3D view mode
choose data (series of maps or space time dataset) used for animation
set workspace file
choose parameter (parameter of m.nviz.image) to animate (e.g. color_map)

NOTE

The Animation Tool follows the computational region settings, so please be sure your computational region is set to the geographic extent of maps you are animating. You can change the computational region (using g.region) and then reload the maps to update the animation.

EXAMPLES

g.gui.animation raster=rmap1,rmap2,rmap3

g.gui.animation vector=vmap1,vmap2,vmap3

g.gui.animation strds=precipitation_2000_2010

The loading of a series of maps into the Animation Tool can be simplified with g.list (back ticks syntax works for Linux and Mac only):

g.gui.animation raster=`g.list type=raster mapset=. separator=comma pattern="precip*"`

Using extended regular expressions, the list of a series of raster maps can be subset by e.g., numeric range (here: precipitation for the years 1997-2012):

g.gui.animation raster=`g.list -e type=raster mapset=. separator=comma pattern="precip_total.(199[7-9]|200[0-9]|201[0-2]).sum"`

AUTHOR

Anna Kratochvilova, Czech Technical University in Prague, Czech Republic

SOURCE CODE

Available at: wxGUI Animation tool source code (history)

Latest change: Sat Jul 16 18:18:43 2022 in commit: effc544b795cef89a0c38628eee513eca82c266e