Congressional Districts in Full JSON Format

The challenge is how to get ERSI shapefiles into a full json format. I had MATLAB fired up and was going to generate this originally. It turns out a lot of the data are already there. Experience matters *a lot*. It took me two weeks to do this before. This

Removing Images of a certain size

I had a bunch of bogus images in my directory and I was going through and manually deleting them. I wised up a little bit and thought I would write a quick script. While it ran, I thought I would share with you. I had: 25760 images and probably about

Road Trip to Camp of the Woods

Yes, pretty much a full day driving, but a great chance to catch up and enjoy each other as a family.

Import Access Data into Excel (via VB and ADO)

I had a lot of data in MySql in a rails application, but I moved to Mongo on a new application and wanted to give the client a nice archive of excel files for each client. It has been a long time since I’ve worked with visual basic, but it

Wind speed calculation

I want to know the impact of wind on endurance. So we have something like this: This gives us 8 cases of wind direction: From this we can infer that going to the center from one of the 8 directions. So an overall flight path would look like this: If

Here we tackle what a Radar needs to accurately measure a target’s position, size and motion. (This is nothing new, just a placeholder for some of my notes.) First of all, everything depends on $SNR$, and the parameter estimation happens in the main computer of a Radar. The theoretical rms

Render CSV in Rails

First I read the docs at: rubydoc.info to understand how FasterCSV is now in the ruby standard library. Then, I set up the following code: This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals

Your key with fingerprint … is not authorized to access heroku with Ubuntu

This error was pretty hard to solve. I emailed heroku support and they recommended: “https://github.com/ddollar/heroku-accounts”:https://github.com/ddollar/heroku-accounts bq. For git commands to work git needs to use the ssh key associated with that account. It’s probably choosing a key associated with a different account which is causing these permissions errors. You can

UTAPS: Mark an IDT as complete

UTAPS is terrible software. I wasted a half hour today going through the source code to figure out how to mark an IDT as complete. I have no idea how folks who don’t understand web codes can navigate this system. Why not include a button? Really?

Get congressional district data to display on d3.js

I’m trying to get congressional district data to display on d3.js so I can do some cool overlays. The trick is to get matlab to comply.