Tutorials

Tutorials

Here you can see series of video tutorials produced by the Terra Antiqua development team summarizing the process of making a global paleoreconstruction.
The four videos are 3 to 7 minutes long and are hosted on our Youtube channel.

Content of the tutorial

This tutorial is based on this hands-on exercise.

These tutorials do not intend to replace the step-by-step indications from this manual. They provide an overview of the plugin functionality and the workflow but you should still visit the page dedicated to the tool you want to use and follow step-by-step indications . You will find all the links in the homepage. They contain much more detailed information and cover more advanced uses that these videos.
Moreover, these videos have been made with Terra Antiqua 1.0 which is not the latest available version. With each update we add new exciting funtionality to our plugin including some advanced parameters that cannot be seen in the videos.

Video Content Tools Used
Video 1/4 - Introduction
  • What is Terra Antiqua and how does it work?
  • How to download and install Terra Antiqua
  • Presenting the User Manual
  • Introducing the Sample Data Bundle to make a full reconstruction at 30 Ma
N/A
Video 2/4 - Main Reconstruction (part 1)
  1. Compile the topography and bathymetry.
    The first step is to compile the topography and bathymetry raster to have one single DEM to work with in further steps.
    Compile Topo- /Bathymetryicon_compile_tb
  2. Dealing with the poles (Greenland and Antarctica).
    • In this reconstruction we are removing 100% of the ice on Greenland and keeping only the bedrock topography. The isostatic rebound corresponding to the absence of ice mass needs to be calculated.
      Isostatic Compensationicon_standard_processing
    • For Antarctica we are keeping the present-day ice topography. This must be copied from the ice topography raster into our compiled DEM.
      Copy / Paste Rastericon_standard_processing
  3. Set the paleo-shoreline
    The next step before concentrating on target regions is to set the paleo-shorelines. These need to be first drawn as polygons. The perimeter of these polygons will be the shoreline. Set Paleoshorelinesicon_set_paleoshorelines
Video 3/4 - Main Reconstruction (part 2)
  1. This part shows the reconstruction of the topography by rescaling the elevation of target regions linearly. Here we are using this tool twice:
    • First to rescale continental scale areas,
    • then to rescale smaller regions within those continents.
    Modify Topo- /Bathymetryicon_modify_tb
  2. Create topography / bathymetry from scratch for regions that are too different.
    When the geography you are reconstructing is too different from the present-day features, this part shows how to create new topography or bathymetry from scratch instead of rescaling present-day values.
    We use some regions as examples: Andes, Ethiopia, and Tibet
    Create Topo- /Bathymetryicon_create_tb
Video 4/4 - Enhncement
  1. Remove artefacts generated during the reconstruction.
    In this part we show this very useful tool in which you can select an area, define a range of values that are to be considered as artefacts and remove them. Then the gaps are filled with values interpolated from adjacent pixels.
    Remove Artefactsicon_remove artefacts
  2. Smoothing the resulting map to facilitate further uses.
    This shows the tool that will smooth the whole map (in v1.1 or higher this can be limited to certain areas) to make it easier to implement in other processes (e.g.: climate modeling)
    Smooth Rastericon_standard_processing
  3. Changing the map symbology
    This gives you a glimpse of what secondary tools are useful for. They help with small functions that can be useful for the enhancement of your map.
    This tool allows you to quickly change the color palette used in your DEM.
    Change Map Symbologyicon_standard_processing

Playlist: Terra Antiqua Tutorials


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Link to general discussions on Terra Antiqua