General |
Site Prediction |
Interview |
Relevant Links
Stereophotomap and Stereopace for the management of cultral heritage: An example Data Structure The data organisation follows a hierarchical structure. Images and data that describe an object (e.g. a town or a monument) are recorded in a directory named "Project". The project can be subdivided "sub-projects" that contain images and data of a portion of the object, also at different dates or at different scale. The following information are linked to each image: strip name, focal length, taking point co-ordintes and rotation values w,j, k. Figure 6 shows the organisation of the data in the Assisi Project. This hierarchical structure allows the user to choose which part of the Stereophotomap he wants to explore, and optimises the way of archiving data. The user can "navigate" inside the Basilica and, at the same time, he knows the co-ordinates of a point in a local system (e.g. internal wall) and in the facade reference system or in the cartographic system (e.g. aerial block).  Figure 5 - Assisi data structure All the data are organised in this logical structure by means of a software named SVMASTER. Every sub-directory (e.g. facade, inside wall, vault, etc.) contains images, data and parameters for the transformation of the co-ordinates. Each sub-project contains the following folders: "Data", "Reference", "Link". The "data" folder contains general information on the data (metadata) and vectorial and raster files, that are necessary to build the index window in Stereospace. The "Reference" folder contains data for the organisation of the reference systems. It is possible to link image blocks oriented in different reference systems through the definition of parameters of a spatial rototranslation. The "Link" folder contains all those parameters that are necessary for consulting the Stereophotomap as a continuum. Conclusions Stereophotomap represents a new way of recording architectural photogrammetric surveys, while Stereospace is a user friendly instrument that is able to enquire the Stereophotomap. In architectural applications, these instruments allow one to "navigate" around a building with the possibility of continuous measuring point co-ordinates, distances, areas and so on. The operator has access to the information offered by images, without any preliminary selection or restitution. Stereospace uses the well known PC platform and Windows environment. Any user can explore the Stereophotomap even if he has no photogrammetric experience. No knowledge of measurement procedures is required: experts that have build the Stereophotomap, have solved these problems before. The cost of production of a Stereophotomap is only 30% of a traditional digital map cost. The possibility of connecting aerial and terrestrial images is an additional advantage of the system and a powerful investigation tool for architectural applications. Stereophotomap and Stereospace offer a new way to represent and survey the cultural heritage.  Figure 6 - "navigation" on the vault References
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