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The measurement of geometric changes in Alpine glaciers is an essential aspect to assess their reaction to climate change effects. Archive aerial images may integrate valuable information to this purpose at times when other types of remotely sensed data are not available. The application of photogrammetric techniques such as Structure-from-Motion (SfM) and Multi-View-Stereo matching allows the extraction of dense point clouds to model the glacier environment. The comparison of multiple datasets requires to setup a stable reference system, a task that in archive photos is generally carried out by means of ground control points (GCPs). This paper would like to propose and assess some techniques to cope with the lack of ground control. Multitemporal SfM (MSfM) is presented and tested on a dataset including six different aerial blocks collected by means of analogue (PAN/RGB) and digital airborne cameras from 1967 to 2006. These images have been downloaded from the IGNF online repository and cover the area of the Val Veny (Brenva and Miage glaciers) in the Mount Blanc massif, at the border between Italy and France. Coupled with other solutions (i.e., extraction of GCPs from maps and DTMs and ICP co-registration of point clouds), MSfM has revealed as a suitable technique for coregistration of multiple photogrammetric blocks of aerial photos with minimum ground control. Some tests carried out in the case study area demonstrated that the integration of MSfM and ICP coregistration for refinement may significantly improve the comparison between multiple point clouds, which is a fundamental pre-requisite for the analysis of glacier changes over time. [ABSTRACT FROM AUTHOR]

Copyright of JLIS.it: Italian Journal of Library, Archives & Information Science is the property of Firenze University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The digitization project Giving a new voice to sources. Communicate humanistic research for all aims to make available to the scientific community the audio archive of the Bruno Kessler Foundation's Library, which preserves the recordings of the conference activities of the two humanistic research centers of the Foundation. The project represents, at least in Italy, one of the first attempts to realize a virtual space devoted to audio archival sources researchable freely online to avoid the deterioration of a cultural heritage of extremely scientific relevance, leading to its conservation and availability. The deterioration of the analogue media of the archival collection makes the digitization a matter of survival which allows a diffusion otherwise unthinkable. The accessibility to the audio archival sources allows for enlarging the number of scholars and students that can benefit from the collection for the research. It also allows general users to approach the cultural contents of the humanities. The paper aims to describe the goals, the phases of realization of the project, the methodological problems due to the critical issues of the material supports, the descriptive analysis of the contents, and the opening of the database. The first part of the essay describes the history of the audio archive of the library. This archive covers an extensive period from 1974 to the new Millennium and is composed of the reels and compact audio cassette. The second part analyses the phases of work of the project, from the preliminary analysis of the support to the conversion and the digital reworking. The last part is dedicated to the method adopted in the compilation of metadata of the files and to the description of the structure of the database, as well as his research functions and the descriptive scheme of each audio. [ABSTRACT FROM AUTHOR]

Copyright of Ataturk Arastirma Merkezi Dergisi is the property of Ataturk Arastirma Merkezi Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of JLIS.it: Italian Journal of Library, Archives & Information Science is the property of Firenze University Press and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)