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Geoinformatics-8-2009
conference [a] [b] fig. 5 (a) the latest version of the visionmap a3 digital stepping frame camera in its new housing. (b) the stepping mechanism of the twin digital cameras that provide the cross-track coverage of the a3 camera. (source: visionmap) radargrammetric method employing a 3d stereo approach for the construction of dems. with the former method, the coherence of the overlapping imagery is all important; if there is low coherence, then the required dem cannot be generated. thus, for general world-wide applications, such as the construction of a global dem, the radargrammetric approach is usually the more appropriate one to be utilized, even if the accuracy of the resulting elevation data is lower. next dr. d. fedotkin of scanex outlined the many software packages that have been developed by his company for the processing of the spaceborne image data that is acquired by the numerous ground receiving stations that have been built by scanex. these include the specialist packages that have been developed to process radarsat, envisat and spot imagery. these can be supplied as boxed solutions with a fairly universal application as well as their specific use with scanex ground stations. the company has also developed a number of giseye boxed solutions that are available to change image formats and to transform image data from one projection to another. a. zheleznyakov of the panorama company then outlined the application of remote sensing image data for map revision and the generation of thematic maps using both boxed solutions and the customized solutions that have been developed by the company. this was followed by a contribution by a. beregovskih of the grad territorial planning institute in omsk, who described in rather broad and general terms the use of remotely sensed image data for regional and urban planning purposes. the final presentation in this section was delivered by the present writer (prof. g. petrie) who gave an overview of the recent use of spaceborne imagery for environmental and disaster monitoring, providing numerous examples world-wide, including many that had been acquired under the aegis of the international charter on space & major disasters. latest news? visit www.geoinformatics.com 2 (c) mapping from spaceborne image data this part of the programme began with a report from dr. m. sinkova of the goszemcadastrsyomka (vishagi) organisation on her continuing series of tests of the high-resolution imagery from the russian resurs dk-1 satellite which is available much more cheaply within russia than the corresponding imagery from the geoeye and digitalglobe companies. using photomod, planimetric accuracies of around +/2 m have been achieved using both the rpc and strictly correct (rigorous) solutions over ground test fields. her presentation was followed by a further report given by v. chulkova of the east siberian affiliated branch of goszemcadastrsyomka (vishagi). this gave details of the organisation s widespread use of spaceborne imagery acquired by the various u.s. very high-resolution satellites for those of its mapping operations that are carried out at [a] 1:10,000 scale. in practice, the interpretational properties of the imagery have proven to be very adequate for mapping at this scale. next came a most interesting presentation by a. chekurin, the commercial director of racurs. he first outlined the company s involvement with international tests of high-resolution imagery from newer satellites such as cartosat1 and geoeye-1, for which the photomod software produces geometric accuracy figures of approximately +/- one pixel in planimetry over well established test fields. on the production side, racurs has undertaken various projects utilizing imagery from the spot, kompsat-2 and formosat-2 satellites for the topographic mapping or orthoimage mapping of extensive areas at 1:25,000 scale in conjunction with dems that have been derived either from existing maps or from srtm elevation data. the company has also supplied spot-5 imagery covering large areas in the tyumen region of west siberia to various customers in the oil and gas exploration sector. there was much else of interest in his presentation, which, in my opinion, needs to appear as a written publication in a suitable journal to reach the much wider audience that would appreciate having this very valuable information. the last group of papers were all concerned with the classical use of spaceborne remote sensing image data within the field sciences. [b] fig. 6 (a) the digitalglobe worldview-2 (wv-2) satellite which has been constructed by ball aerospace. it is equipped with an 8channel multi-spectral pushbroom scanner supplied by itt. (b) the launch of worldview-2 took place at vandenberg air force base in california on 8th october 2009 using a boeing delta-2 rocket. (source: digitalglobe). 33 december 2009
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