[Qgis-user] Strike and dip symbology and labels

[Fernando M. Roxo da Motta]

On Tue, 15 Aug 2017 14:05:44 +0100, Lester Anderson
<arctica1963 at gmail.com> wrote:

  Hi Lester,

  Few days ago Martin Bain sent an answer to a message with subject
"Geology symbols", from Alan Younger.   I think his answer will fit
your needs:

On Wed, 9 Aug 2017 00:05:40 +0000, Martin Bain
<Martin.Bain at lismore.nsw.gov.au> wrote:


> Hi Allan,
> I’m not a geologist, but I wonder if you have seen this recent QGIS
> blog post:
> https://ieqgis.wordpress.com/2017/07/14/using-trigonometry-to-place-and-orientate-labels/
> 
> I hope it might be of some use.
> Cheers,
> Martin.
> 
> From: Qgis-user [mailto:qgis-user-bounces at lists.osgeo.org] On Behalf
> Of Allan Younger Sent: Tuesday, 8 August 2017 8:08 PM
> To: qgis-user at lists.osgeo.org
> Subject: [Qgis-user] Geology symbols
> 
> How do you insert mapped structural symbols into a plan?
> These have a compass orientation & inclination direction.
> These can be any orientation but I cannot see how you can have in one
> layer. Only close success I have had putting single symbols in a
> layer, must be a better way. Allan Younger
> 

  Cheers!


> Hello,
> 
> I have strike and dip structural geology data and would like to plot
> the symbols with correctly positioned labels for the dip marker. The
> strike angle can be used for the rotation in a clockwise direction,
> but labelling the dip vector of the symbol is very hit and miss.
> 
> A typical data file would be:
> 
> Longitude, Latitude, Strike (clockwise from 0 degrees), dip direction
> (orthogonal to strike).
> 
> Is there an easy method to deal with this? I can manually position the
> labels with offsets, but for a lot of data this would be a time
> consuming task!
> 
> Thanks
> 
> Lester
> 
> QGIS version 2.18.11
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  Roxo

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