[Qgis-user] Visualize Raster Timeseries with Standard Min/Max Values

[Alexander Bruy]

Hi,

set up style (including Min and Max) values for single raster and save it.
Then, using MultiQML plugin [0] from GIS-Lab repo [1] apply this style
for all your rasters.

Hope, this helps

[0] http://gis-lab.info/qa/qgis-multiqml-eng.html
[1] http://gis-lab.info/programs/qgis/qgis-repo.xml


2012/2/26 dpan <davepanitz at yahoo.com>:
> Hi all,
>
> I have raster data for a single, continuous variable (e.g. tmean in May) for
> a particular region of interest. I'd like to visualize the progression of
> May tmean across several years with a grayscale or color ramp, to show how
> it changes through time.
>
> qGIS by default stretches and clips each raster's grayscale ramp to the Min
> and Max values for that raster. So each ramp has different Min/Max,
> complicating comparison between years.
>
> I thus want to standardize the Min/Max values across the entire dataset. The
> only way I've found to do this is to determine the Max and Min values for
> the entire dataset, then enter those Min/Max values in Layer
> Properties>Style for each raster.
>
> This is obviously impractical for large datasets (even for small ones,
> really). How do I do this correctly, so I can easily generate visual
> timeseries of a variable of interest?
>
> Many thanks in advance,
> Dave

-- 
Alexander Bruy