Single point reconstructions
Ádám T. Kocsis 
Introduction
All plate tectonic reconstruction reach their full utility, when we are able to tell where specific places, localities with present-day coordinates were in the past at a given point in time.
To illustrate the problems, let’s open the PaleoMap rotation file and the corresponding polygons, as in the previous tutorial:
Individual points
To reconstruct user-defined points, we have to create a new feature collection with the point, and assign it the appropriate plate ID. Let’s see where the City of London used be in the past. London has a present-day coordinates of around 0.1° longitude and 51.4° latitude.
First, click on the Digitisation tool, on the left-hand side:
Then click on the Digitise New Multipoint Geometry tool:
Now you can click anywhere on the map to add a point. Click somewhere around the approximate place of London:
The point will appear on the map, and you will see the coordinates on the right-hand side pane. You can either discard this by clicking on the Clear Geometry button at the bottom, or you can create a new feature. You can also add more points (hence the name: multipoint), but that is not required now. Also don’t worry if the coordinates are not precise, we can change this later. Go on, and create a new feature:
Now you can define what type of feature you want to create, what it was supposed to represent. This is not important, from what we want to achieve (it has more of a labelling function), so you can go with the UnclassifiedFeature option, and click on Next!
Here you can already set some of the attributes of the newly created feature: the PlateID where it belongs, and begin and end time. This we will change later, you can click on Next!
… and also on the next window. Then you have the option of adding the new feature to a feature collection. Create a new feature collection by clicking on Create!
After this step, you should still see the new point.
Editing the feature
First, select the Feature Inspection tool on the left-hand side, and click on the point you have created (you can also zoom in, if you like).