Having bought solar panels myself a couple of years ago, and realizing that the city permit database could be used to find most installations, I decided that it would be interesting to look at the recent history and a few other facets of residential solar panel installations. The first step is to download the structural permit data as a CSV file from the city open data website.
Introduction TXDoT has available, online, detailed data regarding traffic collisions throughout the state. The data itself must be queried and downloaded manually as CSV files, but that is not too bad. I downloaded the data for Harris county from 2010 to 2018. Database is documented at https://www.txdot.gov/inside-txdot/division/traffic/data-access.html Access is from https://cris.txdot.gov/secure/Share Log on and download one year at a time. The zip files will require the login password to open them.
Introduction Houston is one of the worst places in the country for allergies. Since there is reasonably good data available, I thought I should analyze the pollen and mold data with an eye towards prediction - both short and mid range time scales. As with any project like this, step one is reading in and cleaning up the raw data. The data is available online as artisanal spreadsheets at https://www.
Introduction In late 2017 I did an analysis of crime data in my neighborhood (The Heights) using the online Houston Police Department data. This was so interesting that I foolishly decided to expand the effort to cover the whole city. After all, how hard could it be to go from analyzing one police beat with about 13,000 records, to analyzing 109 beats, with a corresponding increase in volume? This effort is still ongoing in fits and starts today, but I thought it would be useful to start documenting the journey now before the pain fades away.
Introduction I have been struggling with geocoding for about a year now, and have begun to learn far more than I wanted about the ugly details of the tools available for free. In particular I have been using Google and the US Census Bureau for geocoding. They each have their own strengths and weaknesses, so I thought it would be appropriate to share what I have learned. I would call Google promiscuous - they will try very hard to return a location to you, even if it is all wrong.
Software Setup Download the software per excellent instructions in the user guide wget -qO - http://weewx.com/keys.html | sudo apt-key add - wget -qO - http://weewx.com/apt/weewx.list | sudo tee /etc/apt/sources.list.d/weewx.list sudo apt-get update sudo apt-get install weewx Answer several questions during install: Station Location: The Heights, Houston, Texas Lat/Long: 29.794878, -95.402820 Altitude: 83, foot Station Type: Vantage usb port: /dev/vpro Set up the usb port: sudo touch /dev/vpro sudo gvim /etc/udev/rules.
Personal weather station conversion I have been running wview since June 23, 2012. It has been a reliable workhorse, but it doesn’t appear to be maintained any longer, and it does have a couple of issues. The new, improved open-source product seems to be weewx, so I’m migrating to that one. This is the story of that conversion. Preliminaries I know that my old database has some bad data in it, so the first thing I want to do is figure out where that bad data is, and fix it before I migrate the database.