Geography Reference
In-Depth Information
the dimensional width of the respective vehicle, which is around of 1.2 meters. Due to this
fact, the two viewing lines are not intersected on the sighted target, but only with great
errors and therefore the bi-cameral stereo photogrammetric systems cannot precisely
identify the positions of the objectives that are at distances of more than approximatively 30
meters from the equipment.
So by using a single video camera, the measurement basis of the applied stereo metric
method is constituted from the distance interval of 20 - 30 meters, between two triggerings
of the camera during the lab vehicle displacement, distance from which the camera sights
the same objective.
On this basis, at the returning at the computing center, it follows that from the obtained
images to be selected by two images in which the interesting objective is evidenced in a
corresponding mode, which will permit the selection of this objective in an electronic
modality and the determination of the pixel coordinates, which achieves the objective
displaying on the monitor screen. These coordinates together with the other data which
accompany the two selected images, will permit to compute, using triangulation
proceedings as well as methods for reporting to the spherical system of the terrestrial
coordinates, the geographic and elevation coordinates of the sighted objective.
The immediate result of this equipment functioning is represented by the obtaining of a
series of digital documents structured in GIS format, documents which contain the data
registered in field, with the possibility to update them anytime.
Taking account of its conception, the “Slide Monitor” equipment can be installed not only
on a terrestrial vehicle, but also on any kind of boats for the surveillance from an aquatic
medium of some isolated objectives disposed on an inaccessible border.
Author details
Axente Stoica, Dan Savastru and Marina Tautan
National Institute of R&D for Optoelectronics - INOE 2000, Romania
8. References
Brzezinska D., Ron Li, Haal N. & Toth C., (2004), GPSVan
TM
Project: "From Mobile Mapping
to Telegeoinformatics: Paradigm Shift in Geospatial Data Acquisition, Processing and
Management,"
Photogrammetric Engineering and Remote Sensing, vol. 70, No.2, February 2004, pp. 197-
210.
American Society for Photogrammetry and Remote Sensing
Caporali A. (2008) . System and Method For Monitoring and Surveying Movements of the
Terrain, Large Infrastructures and Civil Building Works In General, Based Upon the
Signals Transmitted by the GPS Navigation Satellite System. Patent application number:
