uid=HFR,o=lter,dc=ecoinformatics,dc=org
all
public
read
doi:10.6073/pasta/0736191bf6a03ea8e4cede20f5ce6534
Landscape Phenology from Unmanned Aerial Vehicle Photography at Harvard Forest 2013
Stephen
Klosterman
https://orcid.org/0000-0002-8542-2784
Andrew
Richardson
https://orcid.org/0000-0002-0148-6714
2023
English
This data set contains orthophotos in the vicinity of the EMS tower at Harvard Forest, as well as the flight logs from the unmanned aerial vehicle (UAV) used to obtain the digital images used in orthophoto creation. Orthophotos were created by mosaicking approximately 200 JPEG images from each date of observation. The orthophotos cover the spatial extent of the 250 meter resolution MODIS pixel that contains the EMS tower. Land cover types in the area of photography include deciduous and evergreen forest, and wetlands.
The research goal of data collection for this data set was to observe spatial variance in plant phenology. Therefore, photos were taken from before leaf out until after leaf drop. Orthophotos were collected approximately every 5 days during spring and weekly during fall; see filenames for specific dates.
The nominal spatial resolution of the orthophotos is 6 cm, however due to various factors including inaccuracy of the onboard GPS, wind-blown motion of trees, the automated orthophoto mosaicking process, and user error in final georeferencing, image analysis has been conducted at 10 m resolution. The orthophotos are available as GeoTIFF files.
canopies
foliage
imagery
landscape
leaves
phenology
remote sensing
LTER controlled vocabulary
primary production
LTER core area
Harvard Forest
HFR
LTER
USA
HFR default
This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.
Creative Commons Zero v1.0 Universal
https://spdx.org/licenses/CC0-1.0.html
CC0-1.0
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf294
Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum.
-72.1749
-72.1696
+42.5396
+42.5375
337
348
meter
2013
2013
complete
Information Manager
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
hf-im@lists.fas.harvard.edu
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
(978) 724-3595
https://harvardforest.fas.harvard.edu
We used a UAV (3DR ArduCopter Quad-C model) equipped with a digital camera (Canon Powershot A3300) to capture JPEG images continuously during flights. The UAV was programmed to cover the study area (250 m MODIS pixel) in two flights of approximately 10 minutes each. Orthophotos were created from the JPEGs and estimates of image locations, derived from the image file creation times and the UAV flight logs, using the PhotoScan software (AgiSoft, St. Petersburg, Russia). Final georeferencing was performed in ERDAS IMAGINE AutoSync (Intergraph, Huntsville, AL).
The log files contain many variables relating to UAV flight control. Of primary interest are the GPS logs, which are contained on the lines beginning with “GPS”. For further details on log files, see: http://ardupilot.org/copter/docs/common-downloading-and-analyzing-data-logs-in-mission-planner.html#.
Additional technical details are available in Klosterman, Stephen, Eli Melaas, Jon Wang, Arturo Martinez, Sidni Frederick, John O'Keefe, David Orwig, Zhuosen Wang, Qingsong Sun, Crystal Schaaf, Mark Friedl, Andrew D. Richardson. 2018. Fine-scale perspectives on landscape phenology from unmanned aerial vehicle (UAV) photography. Agricultural and Forest Meteorology v. 248 pp. 397-407.
Harvard Forest Long-Term Ecological Research
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
(978) 724-3595
https://harvardforest.fas.harvard.edu
https://ror.org/059cpzx98
pointOfContact
The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts.
National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210.
hf294-01-site-map.png
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hf294-02-A2013-photos.zip
site A 2013 orthophotos
hf294-02-A2013-photos.zip
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image
hf294-03-A2013-logs.zip
site A 2013 flight logs
hf294-03-A2013-logs.zip
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text
https://harvardforest.fas.harvard.edu/data/p29/hf294/hf294-03-A2013-logs.zip
document
hf294-04-A2014-photos.zip
site A 2014 orthophotos
hf294-04-A2014-photos.zip
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tiff
https://harvardforest.fas.harvard.edu/data/p29/hf294/hf294-04-A2014-photos.zip
image
hf294-05-B2014-photos.zip
site B 2014 orthophotos
hf294-05-B2014-photos.zip
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tiff
https://harvardforest.fas.harvard.edu/data/p29/hf294/hf294-05-B2014-photos.zip
image
hf294-06-C2015-photos.zip
site C 2015 orthophotos
hf294-06-C2015-photos.zip
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tiff
https://harvardforest.fas.harvard.edu/data/p29/hf294/hf294-06-C2015-photos.zip
image
informatics
community
short-term measurement