[Qgis-user] Styles for Extremely Small-Value Rasters

[Nicolas Cadieux]

Hi, 
You can manually place the min and max values. Since the screen is limited to 256 values, you will need to decide what values to display.  If 0 is null, you should indicate that in the raster properties. That will help with the classification. 
Nicolas Cadieux M.Sc. 
Les Entreprises Archéotec inc.  
8548, rue Saint-Denis Montréal H2P 2H2 
Téléphone: 514.381.5112  Fax: 514.381.4995 
www.archeotec.ca 
Le 2015-04-03 14:54, "mtreg [via OSGeo.org]" <ml-node+s1560n5199935h46 at n6.nabble.com> a écrit : 

	Hi All, I had a raster output from a kernel density estimate I produced in R (using the adehabitatHR package). I imported the layer to QGIS, and it displays by default without any issue (Rener type: Singleband Gray). However, when I try changing this to color (Render type: Singleband pseudocolor), I can't get the gradient in values to display. Since it is a Kernel Density Estimate result, the values are all extremely low, covering a fairly large area. The range of values is 0 to 6.4773e-10. When I either use the 'Classify' button to set value ranges to specific colors, all of the values stay at 0.  When I enter the small values into the classification Value field by hand, the display does not change. Increasing the values by multiplying the layer makes it feasible and plots okay, but I'd rather keep values to the originals/not go through an extra step. Anybody have success with plotting rasters with extremely small values with different color ramps? Any suggestions are appreciated... Thanks, Mike 
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