I have set up a raster layer using a TIFF file for surface water flooding. The layer indicates the minimum and maximum flood range of 0.102624m – 0.47962m under the Layer Properties Histogram, but I can also see spot levels outside of this range (e.g. 0.9114m) using the 'Identify Features' tool. The data supplier is a well recognised company and thinks this might be a QGIS issue.

The TIFF file came with accompanying tfw, tif.aux.xml, tif.ovr, tif.ovr.aux.xml, and tif.xml files.

put on hold as unclear what you're asking by aldo_tapia, Kadir, Mark Ireland, nmtoken, Vince Aug 11 at 19:18

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  • It may or may not be QGIS issue but with this information it is impossible to say. Without having sample data we are blind. What I can suggest is to open the image with some other software and compare, and to delete (rename, move) the tif.aux.xml file which stores the histogram and let QGIS to re-create it, or create the histogram again with gdalinfo -hist. – user30184 Aug 10 at 11:10
  • Welcome to GIS SE. As a new user, please take the Tour, which explains how our "Focused question / Best answer" model operates. Please edit the question to specify whether the file is TIFF or GeoTIFF (in the latter case, the Esri XML, overview, and world files would be unnecessary to obtain proper geographic placement). If it's not a GeoTIFF, then I would put the onus on the provider to make it one. – Vince Aug 10 at 11:29
  • 2
    Have you tried forcing it to calculate min-max as per this question? gis.stackexchange.com/questions/58809/… – Ed Rollason Aug 10 at 12:05
  • Similarly to @EdRollason have you checked what values are listed in the Metadata tab? – ycartwhelen Aug 10 at 14:31
  • Make sure the min/max values setting (layer properties > symbology) is set to min/max, not cumulative cut count, standard deviation or user-defined. – csk Aug 10 at 19:37