<p dir="ltr">Hi,<br>
Look at online documentation for the Qgis project. There are many PDFs including a Gentle introduction to GIS. YouTube can be a good friend.</p>
<p dir="ltr">It can all be done. Qgis can import the txt file using the layer/add layer/add delimited text layer. You will need to know what CRS (coordinate reference system) to set for the project (probably wgs84 epsg 4326). Depending no the look of the final map and the type of data, you will probably use a heatmap (layer property/style/heatmap).</p>
<p dir="ltr">Good luck( you may need it at first)!<br>
Write back for more info if needed.<br>
Nicolas</p>
<div class="gmail_quote">On May 19, 2016 03:25, "Giulia Valvassori [via OSGeo.org] " <<a href="/user/SendEmail.jtp?type=node&node=5267235&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> wrote:<br type='attribution'><blockquote style='border-left:2px solid #CCCCCC;padding:0 1em' class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr"><div style="font-size:12.8px">Dear all, </div><div style="font-size:12.8px"><br /></div><div style="font-size:12.8px">I would like to use QGIS to depict data derived from population genetic analysis.</div><div style="font-size:12.8px">I'm working on a txt file with information relative to:</div><div style="font-size:12.8px">- Collection sites</div><div style="font-size:12.8px">- Latitude</div><div style="font-size:12.8px">- Longitude</div><div style="font-size:12.8px">- Number of individuals</div><div style="font-size:12.8px">I would like that each collection site has got a marker (such as a circle) of different colour, and of different size according to the number of individuals that are reported for each collection site.</div><div style="font-size:12.8px"><br /></div><div style="font-size:12.8px">Could you explain me how can i do it, please?</div><div style="font-size:12.8px">I'm working in a Windows 10 laptop with QGIS 2.14.2 Essen.</div><div style="font-size:12.8px"><br /></div><div style="font-size:12.8px">Thank you very much in advance.</div><div style="font-size:12.8px">Best regards,</div><div style="font-size:12.8px">Giulia</div></div>
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