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I am using WGS84 in Qgis 2.18, but when I try to use some Qgis Plugins (like Profile Tool and Q-Ras) they don´t work. Is it a coordinate problem? Or something else?

Profile Tool:

It makes the profile but the horizontal scale instead of being in meters is something strange (0,002...0,004...etc). The vertical scale is ok.

Q-Raz:

Error message states:

2018-01-08T18:04:25 1 Traceback (most recent call last): File "C:/Users/Jorge Matos/.qgis2/python/plugins\Qgis2Ras\qras_dialog.py", line 113, in runProfile main(self.river,self.XSection,self.textfile,self.dem,resolut‌​ion) File "C:/Users/Jorge Matos/.qgis2/python/plugins\Qgis2Ras\RASout.py", line 284, in main outfile = open(file_strin_path, 'w') IOError: [Errno 22] invalid mode ('w') or filename:

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    Are you receiving any error messages or warnings using the tools? The tools may require the data to be in a projected crs and not a geographic crs. – artwork21 Jan 8 '18 at 14:32
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    no geographic coordinate system is going to be in meters. A good projected coordinate system to try would be WGS_1984_UTM_Zone_33S or 34S – Dylan Warburg Jan 8 '18 at 18:30
  • Just to add a little flesh to this, WGS84 is a geographic projection which units are in degrees. To get your measurements in meters, you will need to reproject your data to a projected coordinate system. UTM is a global projection that divides the Earth's surface into zones. Angola falls within Zone 33S and Zone 34S so you should use one of these – Nathan Thomas Jan 10 '18 at 1:19
  • Thanks artwork21, Dylan and Nathan for your tips. All the best. – J.E.Matos Jan 19 '18 at 16:57

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