1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar

Image analysis study plot, NE apex by Chris Fastie

Want to add this gigapan to your favorites? Log In or Sign Up now.

Log In now to add this Gigapan to a group gallery.

About This Gigapan

Taken by
Chris Fastie Chris Fastie
Explore score
1.71 Gigapixels
Date added
Jul 13, 2010
Date taken
Jun 25, 2010

Nikkor P C 105mm f/2.5, Nikon...


I compared three methods of determining basal area (cross sectional area of trunks) in this stand of Alaskan birch at the Bonanza Creek LTER site near Fairbanks, Alaska. The diameter of each birch tree was measured in a 42 x 38 m plot surrounding this and two other sample/photo points. This provided a measurement of the actual basal area in the plot (30.0 m²/ha). A standard field method (referred to as plotless, prism, or Bitterlich sampling) was used to select trees which subtended at least a threshold angle (1.736°) from this viewpoint. This sample included 9 trees (124, 132, 58, 57, 56, 64, 63, 121, 120) and provided an estimate of basal area of 20.7 m²/ha. An equivalent method was performed on this 360° panoramic image using horizontal pixel counts to represent the subtending angle. Two additional trees (134, 116) were included in this sample for a basal area estimate of 25.3 m²/ha. The field- and image-based estimates were repeated at two replicate sample/photo points (see the south and NW points at gigapan.org/gigapans/54319/ and gigapan.org/gigapans/54293/).
This study was presented at the Fine International Conference on Gigapixel Imaging for Science (www.cmu.edu/events/gigapixel-science Will open in a new tab or window/). The proceedings paper is available here: fastie.net/wp-content/uploads/2010/11/Fastie-Fine-Conference-m-09-06-10.pdf Will open in a new tab or window. Video of the conference presentation is here: www.youtube.com/watch?v=gBQtVZfx9lc&playnext=1&list=PL6D6265673AAA1E78 Will open in a new tab or window

Gigapan Comments (0)

Toggle Minimize gigapan_comment
The GigaPan EPIC Series, Purchase an GigaPan EPIC model and receive GigaPan Stitch complimentary

Where in the World is this GigaPan?


Stitcher Notes


GigaPan Stitch version 1.1.0963 (Windows)
Panorama size: 1707 megapixels (86648 x 19708 pixels)
Input images: 504 (42 columns by 12 rows)
Field of view: 360.0 degrees wide by 81.9 degrees high (top=42.9, bottom=-39.0)
Use larger blending region
Original image properties:
Camera model: NIKON D40
Image size: 3008x2000 (6.0 megapixels)
Capture time: unknown
Aperture: unknown
Exposure time: unknown
ISO: unknown
Focal length (35mm equiv.): unknown
White balance: unknown
Exposure mode: unknown
Horizontal overlap: 29.6 to 62.7 percent
Vertical overlap: 17.2 to 32.8 percent
Computer stats: 3581.58 MB RAM, 2 CPUs
Total time 3:02:20 (22 seconds per picture)
Alignment: 2:23:46, Projection: 4:06, Blending: 34:28
(Preview finished in 2:33:05)

Member Log In