Long Driveway

by Chris Fastie • July 25, 2013 • 0 Comments

This Google Earth embed did not work well with all browsers so I was testing it here. You can learn more about this project here.

by Chris Fastie • December 19, 2012 • 0 Comments

The Lytro camera is probably the most interesting advance in photographic technology this year. An array of microlenses allows the sensor to capture information about the exact direction from which light is coming, and that allows software to focus every part of the scene regardless of it’s distance from the camera. To highlight this advance, the company’s first camera produced interactive online images which could be refocused by clicking anywhere in the scene (see some here). We have all looked at photos with out-of-focus parts, and it is a novel experience to be able to click on or touch the fuzzy places and have the crisp focus shift as if a focusing ring was being turned. But it has also been maddening to know that the captured data would allow the entire photo to be in focus all at the same time, yet this was not an option for any Lytro photo. It was a clever marketing approach, because modern digital cameras with tiny sensors have very good depth of field, and many of the photos we take now already have everything in focus. Allowing the viewer to “focus the photo after it was taken” highlighted how new this technology was.

Kite’s eye view

by Chris Fastie • December 7, 2012 • 6 Comments

In the late nineteenth century, hand drawn “bird’s-eye maps” were a revelation to earthly New Englanders. When exotic hot air balloons were the only way to gain such a perspective, enterprising artists just imagined what a bird might see. The customers for these maps lived and worked in the buildings depicted, so these are probably placed with some accuracy, relying on existing maps for data. It is the details of the rest of the landscape that were recorded nowhere else. In the 1889 drawing below, cleared fields, orchards, and shrubby growth nearly to the top of Hogback Mountain confirm the wisdom that in 1850 the entire slope, like others all over Vermont, was probably cleared of trees. Today, the young ages of the trees tell the same story, but an old bird’s-eye view is still a revelation.

Grave images

by Chris Fastie • November 25, 2012 • 3 Comments

Chopping hay below the Fled as I walk alongside. Click images to enlarge

My town’s cemetery committee would like to have maps of the grave stones in the three town cemeteries. The late Fletcher Brush cataloged the headstones in each cemetery in the 1990s, and probably made hand drawn maps, but it would be nice to have more official versions. I was asked on Thanksgiving about helping with this mapping, and the next day was beautiful AND had a nice south wind. Flying a kite over the cemetery in the village requires a south wind, and the row of overhanging locust trees along the edge makes late autumn the best season to image all the headstones from above. So I couldn’t resist exploiting what might be one of the last good opportunities to image this site for a long while.

Practice

by Chris Fastie • October 19, 2012 • 3 Comments

I have lost a kite, but I have never lost an RC transmitter (around neck). This was taken during one of the first short-lived launches.

The winds have been light this week as the peak colors have been waning and my KAP pack has been poised by the door. I finally had to ignore the “4 mph” reports at WeatherUnderground and WeatherSpark and just go. I went to the hay field south of the Salisbury village where the south wind might push the kite toward the village center. There were some gusty spells that lifted the KAP rig just high enough so that I had to frantically reel it in when calm returned. Attaching and detaching the Picavet in a hurry requires more practice than I have had, and I surpassed my own record for making nasty tangles that included Picavet line, kite line, and alfalfa. At one point I didn’t have time to take off the Picavet as I wildly pulled the line in hand-over-hand, laying it across the field. After untangling (not my favorite thing), I called it a day, disassembled the Fled, and headed back across the field to the pack. When I got there the wind had picked up, so I assembled the Fled, threw it into the air, and had the rig attached when I noticed that I had left the RC transmitter out in the field — out in the huge field of alfalfa and grass that is at places a foot taller than the transmitter (the thing around my neck in the photo above).

Over Middlebury

by Chris Fastie • October 14, 2012 • 1 Comment

I flew the Levitation Delta for 20 minutes before I had the courage to attach the KAP rig.

Last month I went to the Middlebury Farmers’ Market at Marble Works for the first time ever. My garden had been suffering some scurrilous blight and I was about to feed 10 people for the LEAFFEST weekend. I looked along the row of vendors to the steeple of the Congregational Church beyond some trees and realized there might be enough space to launch a kite there. A west wind would take the kite the length of the lawn and then over toward the church on the “Green,” the village commons. This could offer a unique view of the village center. But the wind almost never blows from the west here due to the north-south trend of the Champlain Valley. Other wind directions would make the flight less rewarding and the launch and landing more risky, and I had never flown a kite from such a small area surrounded by so many power lines, buildings, trees, river banks, and busy roads, so I assumed I would never fly there.

Design, Build, Turn

by Chris Fastie • September 10, 2012 • 2 Comments

I think it is time to upgrade the technology I have used for 14 years to monitor the temperature of my compost pile.

The graph below is live, as long as I keep going out and reading the temperature and coming back in and updating the Google spreadsheet. In 1998 I inherited the old YSI thermometer device and found a 7.5 volt mercury battery for it. The battery is still good, and I even have a spare (also 14 years old). I hope that the participants at LEAFFEST can help me find a replacement technology for the beast.

The featured pile was built on September 10 from a three month accumulation of kitchen, garden, and yard waste, some old hay mulch, freshly cut alfalfa, 100 chopped corn plants, a quart of organic fertilizer (5-3-4), and 20 gallons of spent tomatoes, cucumbers, peppers and cabbage. The pile was turned on October 7.

KAP

Downlink

by Chris Fastie • September 1, 2012 • 0 Comments

Special parcel (Gift) for Mr. Fastie

Twice this year I walked around for more than an hour flying a kite-lofted camera that I thought was taking photos, when in fact it was just fooling me into getting exercise. On the first occasion the shutter controller battery died, and the other time the camera just got confused and stopped shooting. I think I sent radio commands to shoot too frequently and it decided to take a nap. This happened another time as well but I happened to reel everything down after only 20 minutes of not taking photos while I was jogging here and there. I have modified the controller so the battery lasts much longer, and I have learned to be patient when sending radio commands, but I am certain that the rather fragile KAP rig electronics will surprise me again with their unexpected inactivity. So I have been looking for a way to monitor the camera operation from the ground. I have been brainstorming with some friends about how to do this, and Don Blair, a physics graduate student at UMass has been prototyping an alert system based on a $20 pair of walkie-talkies. I couldn’t stand hearing about all the fun he was having in Amherst using MOSFETs to remotely push the walkie-talkie PTT button, so I decided to build my own solution.

Sprucing up the hills

by Chris Fastie • June 29, 2012 • 0 Comments

The Fled overflies as I reel it in.

It has been 14 years since we set up our first study plots south of the Alaska Range. I just returned to Fairbanks from a week-long trip to re-census the plots located above the upper forest limit at the Canyon Creek and Monahan Flats sites. There were a few scattered spruce trees and a total of a few dozen spruce seedlings marked with numbered tags in the quarter-hectare plots in 1998. The trees have not changed much, and only 8 to 10% of the seedlings have died. The surprise was the number of new spruce seedlings that have established in 14 years.

The NIR modified and normal A495 cameras with AuRiCo controller. Synchronous, vertical photos were taken every 16 seconds.

Seedling density increased by a factor of 2.9x at Canyon Creek and 2.2x at Monahan Flats. The similarity between the two sites suggests that the seedling invasion may be widespread. These seedlings have a lot to endure before they become trees, but if similar numbers of seedlings continue to establish and many of them become trees, these plots will no longer be above treeline in 50 years.

I was able to get some aerial photos of most of the plots after I had marked each seedling with pink flagging. I flew a dual camera KAP rig with normal and infrared-modified cameras lofted by a kite. I will be experimenting with false color IR (NRG) and NDVI images which can be created with information from both cameras.

Chatanika Dredge

by Chris Fastie • June 20, 2012 • 0 Comments

I flipped the joystick 1200 times to trigger the shutter (the 4 GB SD card filled up 10 minutes before I pulled it down).

The S95 captured 1170 photos in 1.5 hours while the Fled flew over the relic Gold Dredge #3 of the Fairbanks Exploration Company (F.E. Company). It was built in place in 1927-1928 and dug its own pond which it moved around until 1958. Hundreds of acres of the Chatanika River valley were turned into these concentric ridges of tailings as the placer gravels were devoured by the floating dredge and disgorged by the systematic arcs of its conveyor arm.

Go Orioles!

by Chris Fastie • June 14, 2012 • 2 Comments

A month ago, on May 10, I noticed a wad of dry grass in the birch tree outside my home office window. It was obvious what it was, and a noisy pair of Baltimore orioles soon confirmed that a nest was being constructed. Four days later the nest building seemed to be mostly completed, and I stopped taking photos (click them to enlarge).

Female Baltimore oriole weaving a nest in paper birch tree

May 11, 2012. Female Baltimore oriole weaving a nest in a paper birch tree

Swamp NDVI

by Chris Fastie • May 15, 2012 • 1 Comment

On May 5 my infrared KAP rig made its first photographic flight. The shutters of two Powershot A495 cameras, one modified to record only near-infrared (NIR) light, were triggered every 10 seconds by an AuRiCo KAP controller. The Levitation delta kite hoisted the rig over the northern edge of the Salisbury Swamp, VT. In about 1.5 hours, 420 synchronous pairs of normal and NIR photos were captured. It has taken a while to process just a fraction of these images, but the results are promising. First, some kite porn:

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