<div dir="ltr">Thank you one and all with helpful suggestions about finding a shape file of tectonic plate boundaries.<div>Having tried several of them, QGIS accepts them and allows me to set colour type and thickness of line etc but even if they are the only layer selected I am unable to <i>see </i>them. I must be doing something wrong!</div><div>Maybe it's "old dogs and new tricks" at 77 to learn QGIS. The problem is that this is probably the only time I will ever be using a GIS and all the courses available want to teach so much general GIS before the little bits that I need to learn!! I have my base raster file of the North Atlantic and have learned enough to make individual layers of cable interruptions, sub-sea volcanoes and land-slides etc. but have come unstuck at an <i>imported </i>shape file!</div><div>Anyway, many thanks one and all.<br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><p><span style="font-size:9.5pt;font-family:Arial,sans-serif;background-image:initial;background-position:initial;background-repeat:initial">Dr John Moyle</span><span style="font-size:9.5pt;font-family:Arial,sans-serif"><br>
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does." - Blaise Pascal (C17th French Scientist & Mathematician)</span></p></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 14 Aug 2022 at 22:35, Fielding, Eric J (US 329A) via Qgis-user <<a href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi John,<br>
<br>
Here is a GitHub site with plate boundaries in several GIS formats, including Shapefile and GeoJSON. <br>
<a href="https://github.com/fraxen/tectonicplates" rel="noreferrer" target="_blank">https://github.com/fraxen/tectonicplates</a><br>
<br>
These should work with QGIS. This is from the Bird (2003) paper that is a widely used source of tectonic plate boundaries.<br>
<br>
++Eric<br>
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<br>
Date: Sat, 13 Aug 2022 14:53:54 -0700<br>
From: chris hermansen <<a href="mailto:clhermansen@gmail.com" target="_blank">clhermansen@gmail.com</a>><br>
To: John Moyle <<a href="mailto:drjmoyle@gmail.com" target="_blank">drjmoyle@gmail.com</a>><br>
Cc: qgis-user <<a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a>><br>
Subject: Re: [Qgis-user] Tectonic plate boundaries<br>
Message-ID:<br>
<CACc2_69tDWyP6vyShhiSjNdy=<a href="mailto:fUH6AtwA8B5zX1Emux9MbVjRQ@mail.gmail.com" target="_blank">fUH6AtwA8B5zX1Emux9MbVjRQ@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
John and list,<br>
<br>
On Sat, Aug 13, 2022, 09:38 John Moyle via Qgis-user <<br>
<a href="mailto:qgis-user@lists.osgeo.org" target="_blank">qgis-user@lists.osgeo.org</a>> wrote:<br>
<br>
> Hi<br>
> New to QGIS. I want to plot Victorian submarine telegraph cable<br>
> interruptions under the Atlantic. I know, what an Anorak!!<br>
> I have found a brilliant rasterfile of the seabed from GEBCO to use as a<br>
> base layer. I have also collected all the data of cable failure, submarine<br>
> earthquakes and volcanoes and am ready to make vector layers of all the<br>
> data.<br>
> But what I can't find is a shapefile of the tectonic plates boundaries,<br>
> just the boundary lines with no shading or text.<br>
><br>
<br>
I believe you have a basic misunderstanding of the nature of data within a<br>
GIS.<br>
<br>
Generally the way QGIS (and most GIS) works is they "take" only data such<br>
as points lines and polygons and then the user develops styling on those to<br>
create the desire cartographic effect.<br>
<br>
It would be most unusual to find shading or text in a shapefile.<br>
<br>
Test in a shapefile is an attribute of some geometric feature. So line 377<br>
might have an attribute that is "Mid Atlantic Ridge".<br>
<br>
QGIS provides the ability to print the text attributes as labels, which can<br>
be styled in many useful ways for visualization purposes.<br>
<br>
<br>
Everything I do find is rejected by QGIS as not being in a suitable format.<br>
> Help please!<br>
> John<br>
><br>
> Dr John Moyle<br>
> MB, BS, MSc, PhD, CEng, MInstMC, FRCA, FRHistS<br>
> Chartered Engineer<br>
> Physician & Anaesthetist (Retired)<br>
> Historian (Telegraphy & Medical Technology)<br>
<br>
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</blockquote></div>