Hi <div>I am a bit confused about the map units referred to in the settings for the scale bar in the map composer.</div><div><br></div><div>On my original field slips I drew the UTM co-ordinates and in a temporary shape layer I have drawn points to correspond to the UTM co-ordinates. The field slips are tiff images that I have georeferenced. I have checked and my project is set to be in UTM:</div>
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<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">+proj=utm +zone=35 +south +ellps=WGS84 +datum=WGS84 +units=m +no_defs +towgs84=0,0,0</p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">
<br></p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">I have specified the scale bar in the map composer to have the following values:</p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">
Segment Size: 0.01</p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">Map units per bar unit: 0.01</p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px"><br></p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">
So the first bit of confusion is about the segment size(map units) as I would expect that to be meters, so Segment size should have been 100m...</p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">
<br></p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">Secondly and more importantly, the scale bar does not match up with my temporary shape layer. With the current settings the scale bar should be roughly a km but it is slightly longer than that. I fairly sure I am missing something and would appreciate anyone being able to shed light on these scaling issues.</p>
<p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px"><br></p><p style="margin-top:0px;margin-bottom:0px;margin-left:0px;margin-right:0px">Regards</p><div><br></div>-- <br>Gerhardus Geldenhuis<br>
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