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Feb. 2019 - Seismic Updates

Started by Medeek, February 27, 2019, 10:03:11 AM

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Due to recent changes in the web service (API) of the USGS I have updated the Seismic Map(s) and the Medeek API (seismic data only).

The USGS has discontinued their design maps service and replaced it with a more streamlined JSON API. They have also discontinued previous outdated data sets and also brought new editions online.

I've updated the code that connects to the API and also upgraded from the IRC 2012 to the IBC 2015 for the seismic map:

With the termination of their design maps service the automatic generation of the spectrum response graphs also went away. However, the raw data is still provided by the USGS API, and with that data I am able to graph the spectrum responses with good resolution.

The detailed report now includes larger more legible graphs for both the MCEr Spectrum and the Design Response Spectrum.

The input parameters for the Medeek API (seismic) has also changed. Please refer to the API web page below to review the recent updates:

The output for seismic data has also had a minor change in formatting.

The first thing you will notice with the updated seismic data is the elimination of any IRC data, it is now all based on the IBC, ASCE or NEHRP.

As always more work needs to be done with the API and maps. I am still in the process of providing new maps for the ASCE7-16 wind speeds and updated state snow load maps. Recently SketchUp plugin development has monopolized most of my time and energy but I am committed to providing updates and upgrades to these other engineering services.

Thank-you for your continued support and feedback.
Nathaniel P. Wilkerson, P.E.