توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱GEOMETRIC EVALUATION OF 2D\3D GENERIC SENSOR MODELS FOR MATHEMATICAL MODELING OF IKONOS IMAGERIES
اطلاعات انتشار: همایش ژئوماتیک 82، سال
تعداد صفحات: ۱۱
The current and upcoming high resolution satellite imageries are expected to have a significant impact on the topographic mapping applications of primary data acquisition. However, successful exploitation of the high accuracy potential of these imageries depends on the ability of the mathematical models for the sensor modelling. Nevertheless, most of high resolution satellite vendors do not intend to present their sensor ephemeris data. There is consequently a need for a range of alternative practical approaches for extracting accurate terrain information from these imageries. Although several investigations have already begun in this area, still the subject demands more comprehensive tests for the determination of the geometric suitability of such high resolution images for 2D\3D large scale topographic map production or revisions. In this study the geometric potential of the panchromatic and pansharpen IKONOS images have been thoroughly examined in a test site in Iran. The test is conducted based on a comprehensive evaluation of the ability of the several different mathematical models, e.g. Rational functions, Direct Linear Transformation (DLT), 2D Projective, Polynomials, 3D Affine and Multiquadric approximate models in their different situations.<\div>

۲GEOMETRIC PROCESSING OF IRAN’S IKONOS GEO IMAGE WITH & WITHOUT DSM
اطلاعات انتشار: همایش ژئوماتیک 81، سال
تعداد صفحات: ۱۱
Although Ikonos imagery has been commercially available since early 2000, the use of this imagery and especially the scientific investigations on its potential use in various applications has been restricted to various reasons, the main ones are related to the closed policy of Space Imaging and also high spatial, spectral, temporal and radiometric resolutions of Ikonos image as well as flexible viewing capability of the satellite. In this paper a detailed assessment of the planimetric accuracy of high resolution (1m) panchromatic Ikonos orthoimage products are presented. Low precision and cost of georeferenced Ikonos image products (Carterra Geo, 50 m, CE 90) orthorectified. Planimetric accuracies of 2 m CE90 can be obtained from georeferenced Ikonos using digital surface model (DSM) with RMS vertical accuracy better than 1m. An Ikonos Geo image with semi rigorous and also DLT, 2D projective, polynomials, multiquadrics methods have been used in the test. The test area covers Hamedan city of Iran.<\div>
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