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Styles for High-precision Raster Layers #20706

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qgib opened this issue Apr 15, 2015 · 2 comments
Closed

Styles for High-precision Raster Layers #20706

qgib opened this issue Apr 15, 2015 · 2 comments
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Bug Either a bug report, or a bug fix. Let's hope for the latter! Rasters Related to general raster layer handling (not specific data formats)

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@qgib
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qgib commented Apr 15, 2015

Author Name: Michael Treglia (Michael Treglia)
Original Redmine Issue: 12581
Affected QGIS version: 2.8.1
Redmine category:rasters


When trying to use Singleband Pseudocolor rendering for a raster with very small-value, albeit high precision variables, applying the style fails. I'll note that upon import of the data, the Singleband Gray render type works fine.

Through testing, it seems that the module only has 16 bit variables, however sometimes rasters are higher precision than that allows. The particular raster I was working with was a kernel density surface (created in R), and the values were all extremely small (ranging 0 - 6.4773e-10). When applying a style, even after setting the value ranges for each color by hand, the entire surface appeared as a single color.

Multiplying the layer by 1000000 solved this problem, but having built-in capability to deal with such high precision would be great. Thus, it would be great to have higher-precision value-setting available for raster styles.

@qgib
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qgib commented Apr 30, 2017

Author Name: Giovanni Manghi (@gioman)


  • easy_fix was configured as 0
  • regression was configured as 0

@qgib
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qgib commented Mar 9, 2019

Author Name: Giovanni Manghi (@gioman)


End of life notice: QGIS 2.18 LTR

Source:
http://blog.qgis.org/2019/03/09/end-of-life-notice-qgis-2-18-ltr/


  • resolution was changed from to end of life
  • status_id was changed from Open to Closed

@qgib qgib closed this as completed Mar 9, 2019
@qgib qgib added Bug Either a bug report, or a bug fix. Let's hope for the latter! Rasters Related to general raster layer handling (not specific data formats) labels May 25, 2019
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Labels
Bug Either a bug report, or a bug fix. Let's hope for the latter! Rasters Related to general raster layer handling (not specific data formats)
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