[Qgis-user] Tectonic plate boundaries
Ujaval Gandhi
ujaval at spatialthoughts.com
Fri Aug 19 04:58:42 PDT 2022
Hi John,
I think you may be working with a 'Line' layer so you can't fill the space
between them. You should get a 'Polygon' layer, specifically the 'PB2002_plates'
from the repository mentioned earlier. You can download it from
https://github.com/fraxen/tectonicplates/blob/master/GeoJSON/PB2002_plates.json
[https://github.com/fraxen/tectonicplates/blob/master/GeoJSON/PB2002_plates.json]
(right-click and Save As on your computer) and drag and drop it in QGIS.
I also have a detailed step-by-step tutorial that shows how to import and style
data in QGIS, including the tectonic plate boundaries layer that you are
interested in. If you work through the whole exercise, you will have a good idea
how to import several types of data to QGIS and create a
map. https://courses.spatialthoughts.com/introduction-to-qgis#creating-maps
[https://courses.spatialthoughts.com/introduction-to-qgis#creating-maps]
---
Ujaval Gandhi
Spatial Thoughts
www.spatialthoughts.com [http://www.spatialthoughts.com]
[data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=3D]
On Fri, Aug 19, 2022 at 3:15 PM John Moyle via Qgis-user
<qgis-user at lists.osgeo.org> wrote:
> Thank you one and all with helpful suggestions about finding a shape file of
> tectonic plate boundaries.
> 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 see them. I must be doing something wrong!
> 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 imported shape file!
> Anyway, many thanks one and all.
>
>
> Dr John Moyle
> MB, BS, MSc, PhD, CEng, MInstMC, FRCA, FRHistS
> Chartered Engineer
> Physician & Anaesthetist (Retired)
> Historian (Telegraphy & Medical Technology)
>
> Home +44(0)1608 665968
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>
> "A person has nothing to lose if he believes in God and in the end he turns
> out to be wrong but everything to lose if he wagers that God does not exist
> and it turns out in the end that He really does." - Blaise Pascal (C17th
> French Scientist & Mathematician)
>
>
>
> On Sun, 14 Aug 2022 at 22:35, Fielding, Eric J (US 329A) via Qgis-user
> <qgis-user at lists.osgeo.org [qgis-user at lists.osgeo.org]> wrote:
>
>
> > Hi John,
> >
> > Here is a GitHub site with plate boundaries in several GIS formats,
> > including Shapefile and GeoJSON.
> > https://github.com/fraxen/tectonicplates
> > [https://github.com/fraxen/tectonicplates]
> >
> > These should work with QGIS. This is from the Bird (2003) paper that is a
> > widely used source of tectonic plate boundaries.
> >
> > ++Eric
> > --
> > Eric Fielding
> >
> > Eric.J.Fielding at jpl.nasa.gov [Eric.J.Fielding at jpl.nasa.gov]
> > http://science.jpl.nasa.gov/people/Fielding/
> > [http://science.jpl.nasa.gov/people/Fielding/]
> > Twitter: @EricFielding
> > Jet Propulsion Laboratory
> > Caltech
> > 4800 Oak Grove Drive
> > Pasadena, CA 91109
> > USA
> >
> >
> >
> >
> > Date: Sat, 13 Aug 2022 14:53:54 -0700
> > From: chris hermansen <clhermansen at gmail.com [clhermansen at gmail.com]>
> > To: John Moyle <drjmoyle at gmail.com [drjmoyle at gmail.com]>
> > Cc: qgis-user <qgis-user at lists.osgeo.org [qgis-user at lists.osgeo.org]>
> > Subject: Re: [Qgis-user] Tectonic plate boundaries
> > Message-ID:
> > <CACc2_69tDWyP6vyShhiSjNdy=fUH6AtwA8B5zX1Emux9MbVjRQ at mail.gmail.com
> > [fUH6AtwA8B5zX1Emux9MbVjRQ at mail.gmail.com]>
> > Content-Type: text/plain; charset="utf-8"
> >
> > John and list,
> >
> > On Sat, Aug 13, 2022, 09:38 John Moyle via Qgis-user <
> > qgis-user at lists.osgeo.org [qgis-user at lists.osgeo.org]> wrote:
> >
> > > Hi
> > > New to QGIS. I want to plot Victorian submarine telegraph cable
> > > interruptions under the Atlantic. I know, what an Anorak!!
> > > I have found a brilliant rasterfile of the seabed from GEBCO to use as
> > a
> > > base layer. I have also collected all the data of cable failure,
> > submarine
> > > earthquakes and volcanoes and am ready to make vector layers of all
> > the
> > > data.
> > > But what I can't find is a shapefile of the tectonic plates
> > boundaries,
> > > just the boundary lines with no shading or text.
> > >
> >
> > I believe you have a basic misunderstanding of the nature of data within
> > a
> > GIS.
> >
> > Generally the way QGIS (and most GIS) works is they "take" only data
> > such
> > as points lines and polygons and then the user develops styling on those
> > to
> > create the desire cartographic effect.
> >
> > It would be most unusual to find shading or text in a shapefile.
> >
> > Test in a shapefile is an attribute of some geometric feature. So line
> > 377
> > might have an attribute that is "Mid Atlantic Ridge".
> >
> > QGIS provides the ability to print the text attributes as labels, which
> > can
> > be styled in many useful ways for visualization purposes.
> >
> >
> > Everything I do find is rejected by QGIS as not being in a suitable
> > format.
> > > Help please!
> > > John
> > >
> > > Dr John Moyle
> > > MB, BS, MSc, PhD, CEng, MInstMC, FRCA, FRHistS
> > > Chartered Engineer
> > > Physician & Anaesthetist (Retired)
> > > Historian (Telegraphy & Medical Technology)
> >
> >
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