DendroElevator
DendroElevator is an open-source web platform for tree-ring image curation, visualization, and analysis. The system is optimized to maximize access to gigapixel images of tree rings and related paleoenvironmental proxy datatypes for remote research and distanced collaboration.
DendroElevator features a browser-based toolkit for tree-ring image visualization and time series measurement built for Elevator, a cloud-hosted digital asset management software with curation and robust streaming capabilities for file types of any size and common 2D and 3D formats, plus adaptablity for various metadata and acces permissions schemas.
DendroElevator constitutes an initial realization of our vision to create an open source, easily accessible online repository of high quality tree-ring imagery for entire collections of specimens. More information is here.
Featured Item:
A 2.5 gigabyte image of a big-cone Douglas-fir tree core collected in Kern County, California. Crossdating with dendrochronology confirmed growth increments for Common Era years 1763–2015, with growth rings for 2002, 2007, and 2013 being locally absent.
Pseudotsuga macrocarpa - CHC07A
- Pseudotsuga macrocarpa
- 10/30/2015
- An increment core from Psuedotsuga macrocarpa. Tree rings from this southern California endemic species have been useful for regional studies of paleoclimate and moisture variability. Meticulous crossdating with dendrochronology confirms that this core specimen dates from 1763–2015 C.E., and that growth rings for calendar years 2002, 2007, and 2013 are locally absent, the result of heterogenity in cambium activity during extreme drought years. Sampling did not capture the tree's inner-most growth rings. This specimen was imaged using gigapixel macro photography techniques, producing a focus-stacked mosaic image 289,012 pixels wide by 5,912 pixels tall, with a resolution of 780 pixels/mm (19,812 dpi). The foundational .tiff file size is 2.5 gigabytes.
- Daniel Griffin, Matthew Therrell