I merged four rasters using raster>miscellaneous> merge. (I did not specify any not data values. and it is set as 'Not set'). When I check my four separate rasters, elevation ranges are -6.6 to 64.4 (considering all). But in the merged raster it is -7.66 to 62.98. Why is there this difference? How exactly does this merge work scientifically? Is it using resampling or any other interpolation methods?
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An explanation would be easier if you Edit the question to provide extents and pixel sizes for the rasters involved.– VinceCommented Mar 16, 2021 at 0:03
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I have had a similar problem, which can be viewed at: gis.stackexchange.com/questions/321408/…. Basically, the problem was that the raster's statistics were estimated, rather than actual.– Stu SmithCommented Mar 16, 2021 at 16:02
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pixel sizes would be 0.4m*0.4m and extents are 30km*40km. I just did a rough overview, before I resample, and that raised these questions.– Tharindu ManamperiCommented Mar 27, 2021 at 13:20
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