The map below shows locations of historic photos–both ground-based (red triangles) and aerial obliques (black arrows), mostly by the US Navy in 1926 & 1929. Symbols point in the direction the photo was taken. Clicking on an arrow opens a pop-up with information about the photo and a thumbnail. Clicking on that thumbnail opens a medium-resolution view. Thanks to support from Kim Homan, formerly with the Southeast Alaska GIS Library, for posting this collection. The host is ESRI’s ArcGISonline. By clicking ‘view larger map’ you move to their site.
View Larger Map
Sometimes abbreviated RP, repeat photography is the art and science of precisely retaking historical photographs in order to document, analyse and understand change. We prioritize well-captured and reliably relocated scenes, offering opportunities to examine successional change in vegetational communities, and in some cases landform evolution.
Documenting change through repeat photography in Southeast Alaska, 2004-2005
In 2004 and 2005, Kathy Hocker and I scanned, cataloged and prioritized hundreds of high-quality aerial oblique and ground-based historical photos, and began the long process of relocating and rephotographing the most interesting ones. In those years, we were funded by the US Forest Service/State & Private Forestry. Since then my repeat photography has been more opportunistic. Whenever I fly over new terrain, I bring along the US Navy’s 1926 & 1929 oblique aerial imagery for that area on my tablet.
Although we finished the repeat photography project almost a decade ago, I still refer to it and cite it frequently. In 2013, I updated our final report for the Repeat Photography Project, detailing methods useful to others who may wish to retake historical photographs. The update includes additional images and technological advances since our project officially ended in 2005. (6 megs)
In addition to the summary report, above, I also kept a journal of our daily adventures throughout the 2004-05 project. It’s divided into 2 parts: one for the aerial photos, and another for some of the ground-based ones. Download part 1 on aerial oblique retakes here (5.3 megs):
Download part 2 on ground photos at Haines & Skagway here(5.8 megs):
For more recent adventures in repeat photography, see our page on Lynn Canal biogeographic province.