HOPE
BAY
Bahía Esperanza
63º 23' 51" S 56º 59' 52" W
The stone hut in Esperanza (HSM 39) was built in February 1903 by the geoscientist Johan Olof Gunnar Andersson, Toralf Grunden and Samuel Duse to hibernate in during the Antarctic winter. The hut is named "Cabaña de Bahía Esperanza" in Castellano or, more commonly, "Choza de los Suecos". The hut is located in the south part of the Argentinian Base Esperanza on the Antarctic Peninsula, about 20 metres from the shoreline to the Weddell Sea and close to the natural port of San Martin (HSM 40). The name of the location, Hoppets vik in Swedish, concurrently Hope Bay and Bahía Esperanza, was denominated by the Swedish expeditioners to express their sentiments as they were waiting for their mother ship Antarctic to come for their rescue. For nine months it was their home. Stone walls one meter thick and roughly a meter and a half high were built from flat rocks using sand, and probably guano, as mortar. The sled was placed on top of the structure as a roof beam, and the tent cloth was hanged from it on the inside of the structure, offering some resemblance of cover from snow and wind.

In November 1903 just before the ices were breaking, they re-started their trek towards Snow Hill Island. The stone shelter was documented between January 22 and 31, 2020.
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Point Clouds and Meshes
The 3d documentation of the stone shelter consists of two complete sets of structure-from-motion photography with two different cameras (Fujifilm X-T2 and iPhone XR), with approximately 1260 photos in the first set and 1870 photos in the second, and two complete sessions of laser scanning (Faro Focus m70) with 21-25 individual scanning positions in each session. The result from the laser scanning is published as three point clouds; one collecting all scans into one pointcloud, and a separate pointcloud for each session. The result from the structure-from-motion scanning is published as both pointclouds and textured meshes. The web-previews below are due to band-width concerns reduced to a tenth of the originals' density, but uncompressed pointclouds and meshes can be downloaded from the repository, along with the 46 individual raw laserscans and the photosets that the two structure-from-motion models were built with.
360 degrees panoramas
The panoramas are obtained from the two scanning sessions with the Faro Focus m70 on January 22 and 24, 2020. The original resolution is 20288 x 10144 pixels (full resolution images can be downloaded from the repository). Due to non-ideal weather conditions the majority of the exterior panoramas from the second scanning session (position 77-98) had unsatisfactory colour information, but can still be obtained from the raw scan data in the repository.
Orthophotography
The high resolution orthophotos of the shelter (1 mm per pixel) were created with Agisoft Metashape and structure-from-motion photography taken with a Fujifilm X-T2 camera on January 31, 2020. The photos for the high resolution orthophoto of the site Base Esperanza (10 mm per pixel) were taken with a DJI Phantom 4 drone at 150 meters height on January 31 2020, and then processed in Agisoft Metashape. Due to the penguin colonies we were unable to fly at a lower altitude. All underlying photosets are available in the repository.
Plans and Drawings
Plans, drawings and measurements of the stone shelter and surroundings were carried out using both traditional drawing methods and data from the laser scanner.
Photographs
The photographs were shot by the team members using a diverse set of equipments and techniques.
Historical photographs and drawings
Historical documentation from both the first Swedish South Polar expedition 1901-1903 and later interventions.