[GRASS-dev] [GRASS GIS] #3160: g.gui.animation: enhance display of stvds that contain time periods with no-data

[GRASS GIS]

#3160: g.gui.animation: enhance display of stvds that contain time periods with
no-data
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 Reporter:  veroandreo              |      Owner:  grass-dev@…
     Type:  enhancement             |     Status:  new
 Priority:  normal                  |  Milestone:  7.2.0
Component:  wxGUI                   |    Version:  svn-trunk
 Keywords:  g.gui.animation, stvds  |        CPU:  Unspecified
 Platform:  Unspecified             |
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 For vector time series with no-data time periods, the animation is sub-
 optimal as it is currently. For example, I have weekly vector maps
 (points) that represent the occurrence of disease cases. These cases
 appear only in certain weeks of the year (summer weeks). I registered my
 weekly vectors of disease cases as a STVDS to make use of time
 information.

 However, none of the solutions provided in G7:g.gui.animation is optimal
 to display this kind of data (STVDS). The options available are: 1) to
 display time periods of no-data (periods of no cases occurrences) and 2)
 to NOT display time periods of no-data.

 If I choose to display time periods of no-data (no disease cases), I get
 black screens when there are no cases (which is most of the year). That
 makes the animation a bit ugly.

 On the other hand, if I choose to NOT display those time periods in which
 there are no cases, I get the last disease cases that appeared frozen
 there for most of the year, i.e: the last vector map with data remains
 frozen until new vector maps with cases are reached. At least for this
 particular case, that behavior is not correct nor desirable. It would mean
 that there's always someone reporting a disease case in that place, which
 is not true in the data.

 So, during those parts of the year with no data (no disease cases
 occurrence), I would expect to only see the background raster I choose,
 i.e.: no frozen last vector map, only the raster I had added as
 background.

 I know passing a list of vectors instead of a STVDS solves the issue of
 periods with no data, but I loose time info which was the whole point.

 Thanks a lot :)

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Ticket URL: <https://trac.osgeo.org/grass/ticket/3160>
GRASS GIS <https://grass.osgeo.org>