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<body> | ||
<h2>Geological angles</h2> | ||
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This tool allows to calculate the angles (as degrees) between a reference plane and the (eventually selected) features in a point layer (Fig. 8). | ||
This tool allows to calculate the angles (as degrees) between a reference plane and the (eventually selected) features in a point layer (Fig. 1). | ||
<br />It can be applied to determine the degree of misalignement between a reference (for instance, regional) measure and local geological measures. | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/angles_01.png" alt="Calculate Angles interface"> | ||
<img src="ims/angles_fig_01.png" alt="Calculate Angles interface"> | ||
<br /> | ||
<figcaption>Fig. 8. Geological angles calculation interface.</figcaption> | ||
<figcaption>Fig. 1. Geological angles calculation interface.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
The user has to define the two fields storing the azimuth (dip direction or RHR strike) and the dip angle of each feature, | ||
the attitude of the reference plane, and the name of the output shapefile with a new field storing the calculated angle (Fig. 9). | ||
the attitude of the reference plane, and the name of the output shapefile with a new field storing the calculated angle (Fig. 2). | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/angles_02.png" alt="Definition of parameters"> | ||
<img src="ims/angles_fig_02.png" alt="Definition of parameters"> | ||
<br /> | ||
<figcaption>Fig. 9. Definition of parameters for angle calculation.</figcaption> | ||
<figcaption>Fig. 2. Definition of parameters for angle calculation.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
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<div style="font-size: 85%; font-style: italic;"> | ||
----- | ||
<br /><br /> | ||
Doc version 2018-08-29, by Mauro Alberti - <a href="mailto:[email protected]">[email protected]</a> | ||
Doc version 2018-09-01, by Mauro Alberti - <a href="mailto:[email protected]">[email protected]</a> | ||
</div> | ||
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<br /><br /> | ||
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@@ -16,12 +16,12 @@ <h1>Geological stereonets</h1> | |
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This tool allows to create stereonets representing geological plane and axis/slickenline attitudes | ||
as great circles, poles, faults with slickenlines and T-L diagrams. | ||
Its interface is represented in Fig. 2. | ||
Its interface is represented in Fig. 1. | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/geocouche_bl_total.png" alt="Geological stereonets"> | ||
<img src="ims/stereonet_fig_01.png" alt="Geological stereonets"> | ||
<br /> | ||
<figcaption>Fig. 2. Stereonet interface.</figcaption> | ||
<figcaption>Fig. 1. Stereonet interface.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
To plot data in a stereoplot, there are three main steps to follow: | ||
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<h3>Choice of input data</h3> | ||
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It is possible to use input data from data stored in a point layer (<i>Layer</i> tab, Fig. 3) | ||
or to use text input (<i>Text</i> tab, Fig. 4). | ||
It is possible to use input data from data stored in a point layer (<i>Layer</i> tab, Fig. 2) | ||
or to use text input (<i>Text</i> tab, Fig. 3). | ||
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<h4>Input from point layer</h4> | ||
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When using a point layer already loaded in the TOC, plane and/or axis attitudes | ||
are defined via the fields storing their values (Fig. 3). If there is a selection, only selected features will be used. | ||
are defined via the fields storing their values (Fig. 2). If there is a selection, only selected features will be used. | ||
<br /> | ||
<br /> | ||
Depending if you want to plot planes, lines/axis of faults with slickenlines, you have to define accordingly the source | ||
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@@ -53,9 +53,9 @@ <h4>Input from point layer</h4> | |
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<br /><br /> | ||
<figure> | ||
<img src="ims/geocouche_bl_input_layer.png" alt="Input from point layer"> | ||
<img src="ims/stereonet_fig_02.png" alt="Input from point layer"> | ||
<br /> | ||
<figcaption>Fig. 3. Interface for input from point layer interface.</figcaption> | ||
<figcaption>Fig. 2. Interface for input from point layer interface.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
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@@ -74,12 +74,12 @@ <h4>Input from point layer</h4> | |
<br />0° > rakes > -180° -> normal movements | ||
<br /> | ||
<br />When using rakes, slickenline trend and plunge does not need to be explicited. | ||
<br />Moreover, when defined, rake values <u> take priority </u> above any defined trend-plunge and movement sense values (if present). | ||
<br />Moreover, when defined, rake values <u> take priority</u> above any defined trend-plunge and movement sense values (if present). | ||
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<h4>Input from text</h4> | ||
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The input can be inserted into a text window (Fig. 4), defining if data consist of: | ||
The input can be inserted into a text window (Fig. 3), defining if data consist of: | ||
<ul> | ||
<li>planes</li> | ||
<li>axes</li> | ||
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@@ -91,47 +91,47 @@ <h4>Input from text</h4> | |
using dip direction or RHR strike. | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/geocouche_bl_input_text.png" alt="Input from text"> | ||
<img src="ims/stereonet_fig_03.png" alt="Input from text"> | ||
<br /> | ||
<figcaption>Fig. 4. Input from text interface.</figcaption> | ||
<figcaption>Fig. 3. Input from text interface.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
<h3>Plot style</h3> | ||
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Styles can be defined for both great circles and poles: color, width/size, line/marker style, and transparency (Fig. 5). | ||
Styles can be defined for both great circles and poles: color, width/size, line/marker style, and transparency (Fig. 4). | ||
<br />Settings are stored in memory and resused in subsequent sessions. | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/geocouche_bl_plot_style.png" alt="Plot style"> | ||
<img src="ims/stereonet_fig_04.png" alt="Plot style"> | ||
<br /> | ||
<figcaption>Fig. 5. Plot style interface.</figcaption> | ||
<figcaption>Fig. 4. Plot style interface.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
<h3>Stereonet plotting</h3> | ||
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Plots can use a new or a pre-existing stereonet plot. Previous plots can be erased by using the button <b>Clear stereonet</b> (see Fig. 2). | ||
Plots can use a new or a pre-existing stereonet plot. Previous plots can be erased by using the button <b>Clear stereonet</b> (see Fig. 1). | ||
<br />Plane can be plotted as great circles or as plane normals, axes as poles or as normal great circles, faults with slickenlines | ||
as great circles with arrows or alternatvely as T-L diagrams (Fig. 6). | ||
as great circles with arrows or alternatvely as T-L diagrams (Fig. 5). | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/geocouche_bl_plot_choices.png" alt="Stereonet plotting"> | ||
<img src="ims/stereonet_fig_05.png" alt="Stereonet plotting"> | ||
<br /> | ||
<figcaption>Fig. 6. Stereonet plot interface.</figcaption> | ||
<figcaption>Fig. 5. Stereonet plot interface.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
An example of stereonet is shown in Fig. 7. | ||
An example of stereonet is shown in Fig. 6. | ||
<br /><br /> | ||
<figure> | ||
<img src="ims/stereonet_06.png" alt="Stereonet interface"> | ||
<img src="ims/stereonet_fig_06.png" alt="Stereonet interface"> | ||
<br /> | ||
<figcaption>Fig. 7. Stereonet example.</figcaption> | ||
<figcaption>Fig. 6. Stereonet example.</figcaption> | ||
</figure> | ||
<br /><br /> | ||
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<div style="font-size: 85%; font-style: italic;"> | ||
----- | ||
<br /><br /> | ||
Doc version 2018-08-29, by Mauro Alberti - <a href="mailto:[email protected]">[email protected]</a> | ||
Doc version 2018-09-01, by Mauro Alberti - <a href="mailto:[email protected]">[email protected]</a> | ||
</div> | ||
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<br /><br /> | ||
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