However, I would like to tell you that the image that I’ve given you is very simplistic compared to the map which I would like to restore, because I wanted to ask about the concept. However, I conclude based upon your answer that it is impossible to do that and the only way is to try doing what you’ve explained in your descriptions (play with rotation and scaling etc.) because this is exactly what I thought about before asking my question. Certainly, I know all the issues that you’ve described in your first paragraph and the problem of the restoration is due to the fact that the fault line is not perfectly straight (containing a translational and rotational components).īut I was wondering if Illustrator could have a feature that allows me (if I trace the main parts manually and separately) to let me move (“glide”) the right pink part against the fault’s trace in one single move (I mean if Illustrator can recognize the fault’s trace and let the right pink part follows this fault-line path) until joining the right pink part. You understood very well what I would like to do. Jacob, thank you very much for your answer! Exactly, this is what I am asking about. It seems that the top left pink has been compressed along the fault line (more or less east to west), and therefore should be stretched and correspondingly compressed in the northerly southerly direction.Ī similar change of the area round the Jinshan River probably applies. Obviously, you will also have to deal with the (almost literally) disturbing fact that the Jinsha River has come much closer to the fault line than it was originally. You may start by rotating and moving a copy of each part, such as the the top left pink part to a first fit along the bottom right pink part, then adapt by scaling (trying to keep the area more or less constant) you may rotate it anticlockwise corresponding to a horizontal fault line in order to (easily) scale along it, then rotate it back, going back and forth until you are satisfied, and do the same in connexion with a possible scaling across you may look at the area of the bounding path. The following descriptions/considerations apply to moving the parts north of the fault line. I presume you are using a redrawing or Image Tracing, preferably getting strokes rather than filled areas for parts like the fault line and the Jinsha River (see tracing options). One fundamental issue is that displacement along a non straight fault line will inevitably cause deformation in the direction across the line, and therefore it is impossible to perform a simple Move areas such as the top left pink part will have a (maybe insignificant) deformation, depending on how far away from the fault line the deformation extends/is distributed and upon the actual displacement history: the top left pink part has undergone an initial compression (where the fault line curves upwards) followed by an inflation on the other side of that, and also a rotation (first a bit one way, then more the other way). Obviously, the displacement would apply to a long strecth, maybe decreasing towards some ends far away. Detailed studies of piercing points show the San Andreas Fault has experienced over 225 km of movement in the last 20 million years, and this movement occurred at three different fault traces.As I (mis)understand it, you wish to recreate how (part of) the area looked/would have looked before/without the 80 km displacement. The best type of piercing point includes unique patterns that are used to match the parts of a geological feature separated by fault movement. Other types of faults-normal and reverse -tend to be more destructive, obscuring or destroying these features. Transform faults are unique because their horizontal motion keeps a geological feature relatively intact, preserving the record of what happened. Piercing points are very useful for recreating past fault movement, especially along transform boundaries. When a geological feature is cut by a fault, it is called a piercing point. The fault can be seen about halfway down, trending left to right, as a change in the topography. This is caused by the San Andreas Fault cutting roughly perpendicular to the creek, and shifting the location of the creek over time. Note as the creek flows from the northern mountainous part of the image, it takes a sharp right (as viewed from the flow of water), then a sharp left. \): Wallace (dry) Creek on the Carrizo Plain, California.
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