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Geoinformatics_01-2009
event graphy: & tomorrow fig. 2 the top table of speakers from the plenary sessions, comprising from right to left - e. kisilevskiy (gasprom); s. melnikov (geokosmos); e. medvedev (geolidar); s. vatslid (trimble): and p. goellner (geokosmos) answering journalists questions during the press conference. (source: rsprs) ii laser scanning turning next to the technology side and, in particular, to laser scanning, the main focus for the system suppliers who serve this area was the presentation of several recently introduced products that are designed specifically for airborne and mobile (ground-based) mapping applications. lightweight airborne scanner product in the form of his company s dragoneye topographic laser scanner [fig. 3 (b)]. this generates an elliptical (palmer) scan pattern over the ground with the laser having a pulse repetition frequency (prf) of 300 khz when operated from a low altitude of 200 m. a complete dragoneye system which comprises the scanner; control electronics; twin small-format cameras; the positioning and orientation system; and data storage units weighs only 25 kg. next n. studicka of riegl gave some details of his company s new lightweight and compact vq-480 airborne laser scanner [fig. 3 (c)]. again it is designed for use from lower altitudes with the laser rangefinder having a prf of up to 200 khz. it utilizes the typical riegl arrangement of a continuously rotating multi-faced scanning mirror to generate a parallel pattern of measured scan lines over the ground. it also features the continuous digitization of the complete waveform of the signal returned from each successive pulse that strikes the ground objects, while analyzing the waveforms online to provide data with properties that are quite similar to those produced by full waveform analysis sytems. finally, dr. e. medvedev of geolidar, in his presentation on the products of the german systems supplier, igi, (which is represented in the russian market by geolidar) gave the latest information on the well known litemapper 5600 airborne laser scanner. airborne laser scanners dr. v. ussyshkin of optech first discussed her company s new and very compact altm orion airborne laser scanner [fig. 3 (a)] that is designed specifically for corridor mapping from lower altitudes. with a volume of one cubic foot, the system is seven times smaller and three times lighter than the company s larger altm gemini model that is designed for wide area laser scanning from higher altitudes. a. ekelund of ahab also intro[b] duced a new and similarly compact and [a] mobile mapping systems regarding mobile mapping systems, dr. ussyshkin also gave details of the new optech lynx mobile mapper [fig. 4 (a)]. each laser scanner unit that is incorporated into a lynx system generates a 360 degree field of view in the vertical plane, allowing the continuous measurement of profiles of the surrounding road or railway surfaces, adjacent structures and overhead objects. the class 1 lasers used in the lynx scanners are of course designed specifically to be eye-safe, yet they are still capable of measuring ranges up to 100 m. [c] fig. 3 three of the new compact airborne laser scanners that were introduced to the participants of the conference (a) the altm orion (source: optech); (b) the dragoneye (source: ahab); and (c) the vq-480. (source: riegl). latest news? visit www.geoinformatics.com 53 jan./feb. 2009
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