Transforming Data in Voxler 2NewsletterHome

Sometimes it is necessary to rescale the models you create in Voxler so that they display with more vertical exaggeration. You will find that this is necessary when the range of the X and Y extents are much greater than the range of the Z extents of your data. You can add a touch of vertical exaggeration by adding a Transform module to your dataset in Voxler. However, when you add the Transform module, the transformation does not always apply in the same way to all data sets. The transformation of data in Voxler originates from the center of the dataset and spans outward in both directions equally, which can be different for each data set. Therefore the same transform applied to one data set may not give you identical results as when it is applied to a different data set. So the trick to get the Transform to behave the same for two different data sets is to transform one data set, then calculate the scale and translation you need to use to get the same results for the other data set. For this article I am going to use an example of a topography surface (displayed as a ScatterPlot) and some well data (displayed with a ScatterPlot). To load either data set, click the File | Load Data command. Step through the import process, using the defaults for all options. After the data is imported, right click on the data module and choose Graphics Output | Scatter Plot. For both data files, the XY coordinates are in UTM meters and the Z range is in meters. This produces a very flat graphic because the range in the XY coordinates (UTM) is much larger than the range of the data’s Z values, similar to the wells being modeled under a large surface shown in the image below. For this model to appear meaningful, the Z data will need to be transformed so that the scale of the Z is increased to a reasonable size relative to the X and Y data. The following steps detail this process. So this is good. For the Example_Well_Data.csv set, we are using a Z Scale of 10. For the Example_Surface_Data.csv, we calculated that we will use a Z Scale of 10.201768. In the Voxler network window, you add this information toTransform modules to both datasets by: You will notice the wells in the model and the surface are scaled to display better, but don’t line up correctly. This is due to the transform occurring about the Z midpoint values. We will need to use a few more steps to get all of the data to display in the proper locations in the model. Keep up the good work with your ingenious, efficient, functional and cost effective software products. Dr. Lazaros Polymenakos Consultant Geologist-Geophysicist Golden Software is in a class all its own! Your software is outstanding. But, what I really appreciate is when I have a problem, in a matter of minutes I can get a friendly, live, competent technician on the phone. Who else offers that service in this day and age? Paul Lundegard Ph.D., Environmental Geoscientist Copyright © 2016 Golden Software, LLC. All rights reserved. The names and logos for Surfer, Grapher, Voxler, MapViewer, Didger, Strater and Golden Software are registered trademarks of Golden Software, LLC. Source.


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Last Modified: April 22, 2016 @ 5:02 pm