All posts by Richard

Lego Mindstorms Meets HDR Photography!

Wow! Fantastic! Superb! I really can not think of enough adjectives to complement French photographer Tanguy Louvigny, who created a time lapse video of the Normandy and Brittany country-side using High Dynamic Range photography (HDR Wikipedia Link). His movie incorporated 30 frames per second, that’s 90 exposures for each second of screen time (HDR takes each shot in triplicate using different exposure settings … learn more from my prior post on HDR).

Equally amazing is the Legos camera / tracking system Mr. Louvigny  built using Lego Mindstorms. Quoting Open Culture, which is the web site from which I first learned of this video: "To create the moving-camera effects, Louvigny designed and built his own robotic three-axis motion system using Tetrix motors and a LEGO Mindstorms control system, which he programmed in ROBOTC language. This allowed him to automate the tortoise-like dolly, pan and tilt movements."

Lego-Camera-Tracking

Take some time to review the photographer's web site … you'll find more equally fascinating creations. However, for the moment, relax, turn your computer's speakers on, and enjoy a trip through the French country-side from sunrise to sunset. Wow!

Hdr skies from Tanguy Louvigny on Vimeo.

 

Nordic Night Skiing

For those of you from warmer parts of the world, this photo is an attempt to help you understand why I love cross-country skiing at night. While exercising the body, I relax the mind! Who cares if the temperature is 14F? This photo uses HDR technology and was taken a few hours ago just outside the chalet at Elm Creek park in suburban Minneapolis. Click upon the image to view full sized.

Elm-Creek-HDR-2

NorthstarNerd.Org is Five Years Old!

It's been a little over five years since I started blogging as the Northstar Nerd. During that period … you … my audience has visited me 355,000 times while reading my 1,113 posts. This blog is my personal search to expand out mutual knowledge horizon! 

Here are just a few of my favorite posts on NorthStarNerd.Org (and yours):

Thanks for your support, input and comments over the years. I've never asked for money for myself (never will). I've never hosted an advertisement (never will). I've never allowed guest bloggers whose only goal is to drive traffic to their commercial web sites (never will).

My one request! 

Help me spread the word about NorthstarNerd.Org: (my profile)

  • Become a Facebook Fan (click "Like" in upper right)
  • Share a few kind words via LinkedIn (click below)


Nerd

GeoMapping for the Rest of Us!

It's been a while since a new tool really excited me, but BatchGeo is just such a tool! In a prior post I reviewed and discussed how much I like data visualizations, and was even interviewed by the NY Times a number of years ago because of my work in this knowledge domain. Thus, why do I love BatchGeo?

  • The software makes mapping data to Google Maps painfully easy!
  • The steps to create a data visualization are:
    • Copy your data including the column headers from Excel
    • Paste that data into BatchGeo
    • Click to create your map … and the basic service is free.

What's even more amazing all the data from your Excel columns will be as close as a mouse click on any geo point. Let's investigate an example … the most recent results of the Cincinnati Half Marathon. The data elements (i.e. Excel columns) for each runner are:

  • Name
  • Time
  • Gun Time
  • Pace
  • Age Group
  • Overall Place
  • Division Place
  • Sex Place
  • City
  • State

Obviously, your data could have any fields, but given this service is about mapping … location should be present (city, state, country, etc). Here is the finished GeoMap (partial screenshot given below). Given most of the competitors were from the Ohio area, drill down into the map to gain a perspective. Once you have the map at a reasonable resolution, click on a few "elements/data points!" The service also incorporates search against all the data in your database.

If you would like to try the service, I've included an excerpt of the marathon database (i.e. 260 records out of the original 1,241 runners). Remember to copy the field headers as well as the Excel data. When you browse to BatchGeo, just paste your data in the large window indicated … you can't miss it! You then should either click on <Validate & Set Options> or <Map Now>. While you could just click "map now" select the validate option. You don't actually have to validate any data elements, but it does give the option to group your data by any desired variable. Given this service is oriented towards geo mapping, the logical grouping will normally be focused upon some "location variable". I chose "city".

If you want to try other examples, the easiest way to find Excel data is by using Google Advance Search. Use the file drop down to limit your results to <xls> files (i.e. Excel).

There are three options for your final output:

  1. Paid, full private output
  2. Free, public (and published in BatchGeo's browsable / searchable database) 
  3. Free, private (but viewable by anyone with the url)

And the promised screenshot … click on image to view full sized.

Geo-Map