Latest Contributions by BenBradley

Thank you, Dr. Wu. Downloading v.2.1 seems to have solved my problem (I was using v.2.0 before).  ... View more

Hello Dr. Wu, Thank you for this great tool. I have a question about the input format for numbers. I occasionally receive a "Failed script" error due to "ValueError: math domain error" and I haven't been able to figure out what is causing it. Below are some of the causes I've discovered for this error but there is clearly another criterion that I'm missing. Magnitude must be greater than 0 Strike must be between 0 and 360 Dip must be between 0 and 90 Rake must be between -180 and 180 What else am I missing? Do values need to be rounded in some way? Do fields need to be in format = Double? Etc. The traceback listed errors in line 23 in <module> for the Beachballs_all_v20 python script and also line 582 in <module> in the focal_all.py script. Thank you, Jens ... View more

Brilliant!! Thank you. I think this should do it. The USGS saves the day again. ... View more

This is getting closer to the solution, and this tutorial was helpful: Match features with symbols in a style But the problem remains that I'd have to create and rename 500 marker styles and then define every single marker symbol (up to 500 points) within my style to correspond to the right PNG picture file. And then any time that I regenerate my attribute table with more earthquakes, the whole list could get out of sync, matching the wrong beachball symbol with the wrong earthquake. To answer your question, the point of this symbology is to quickly see the style of each individual earthquake in an area. This is a commonly used technique in geology and geophysics because it instantly tells the viewer the faulting regime (i.e. strike-slip or thrust faulting), it hints at the orientation and relative magnitudes of the forces that caused the earthquake, it gives some indication of the nature of surface shaking that resulted from that earthquake, and it gives 2 possible orientations for the fault that slipped to create the earthquake. These are very powerful visual tools and it's relatively easy to map them in MATLAB, but apparently a lot more difficult to map in Arc. I'd much rather create a map in Arc than in MATLAB because Arc typically produces much cleaner maps in a less cumbersome way. ... View more

Thanks for the link. Sizing the points differently is no problem. But instead, I need a completely different PNG symbol to represent each point. Do you know of a way to bring in a unique PNG symbol for EACH of the ~500 points? ... View more