共查询到20条相似文献，搜索用时 27 毫秒
1.
光束法平差在工业测量系统TSST中的应用 总被引：5，自引：0，他引：5
本文将经纬仪工业测量系统模拟摄影测量系统，把角度传感器视为摄影机，将物方点的角度观测值化算为虚拟像点坐标，从而按摄影测量光束法平差进行两台或多台经纬仪间的系统定向和空间坐标解算。利用光束法平差技术研制开发了中文ＴＳＳＴ２．００工业测量系统软件；对经纬仪整平状态和未整平状态下的实际测量结果进行了比较和分析，研究结果表明利用光束法平差技术可以处理经纬仪在任意姿态的观测值，其精度达到了整平状态的结果；最后还介绍了ＴＳＳＴ工业测量系统在实际测量中的应用。 相似文献
2.
Y. D. Huang 《The Photogrammetric Record》1998,16(91):97-104
The calibration of phototheodolites such as the Wild P32/T2 combination sometimes involves determining not only the camera interior orientation parameters but also the camera-to-theodolite parameters. The latter become particularly important when the theodolite set orientation parameters are to be used as observations, especially as known quantities for data reduction in subsequent photogrammetric applications. This paper presents experiments to determine these parameters for a Wild P32 camera using a new camera-on-theodolite method, with details of results achieved. 相似文献
3.
将电子经纬仪工业测量系统模拟摄影测量系统,把经纬仪水平角、垂直角观测值化算为虚拟像点坐标观测值,按摄影测量光束法平差进行二台或多台经纬仪间的系统定代间坐标解算,从而实现了经纬仪在任意姿态下的空间坐标测量功能。在光束法平差的基础上开发了中文版ＴＳＳＴ２．００工业测量系统软件。最后介绍了偏置型抛物面天线的数学模型和ＴＳＳＴ工业测量系统在其检测中的应用。 相似文献
4.
I. J. Dowman 《The Photogrammetric Record》1973,7(42):662-677
Methods of testing and adjusting photogrammetric plotting instruments are reviewed and the precision of traditional simple methods is investigated. Practical tests confirm the theoretical results and suggest the most efficient methods for determining the co-ordinates of the perspective centre, the principal distance and the adjustments necessary to the interior orientation. These methods are incorporated in a procedure for testing instruments using either a large computer or a desk top computer. It is concluded that an improvement in accuracy and efficiency can be obtained by using redundant observations and a computer to handle the mathematical adjustment. 相似文献
5.
Erik W. Grafarend 《Journal of Geodesy》1985,59(2):124-138
Summary From a two-dimensional network adjustment it is well understood that the one orientation unknown of a theodolite frame is
estimable, once the orientation datum parameter, e.g., one azimuth, is fixed. In three-dimensional networks the problem of
estimability of three orientation unknowns inherent in a theodolite frame is more complex. Here we prove that not only the
classical horizontal orientation unknown is estimable (up to the datum degrees of freedom), but also astronomical longitude
and astronomical latitude which can be considered as two additional orientation unknowns of the theodolite frame moving with
respect to an earth-fixed equatorial frame of reference. Thus the theodolite instrument can be considered—at least theoretically—a
gradiometer measuring the variation of the directional parameters of the gravity vector from one point to another. Or up to
the datum degrees of freedom astronomical longitude and astronomical latitude can be determined from only theodolite observations
between exclusively terrestrial points. M?nicke (1982), has shown that despite the refraction problem the method works sufficiently
well in practice. 相似文献
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7.
L. A. Kivioja 《Journal of Geodesy》1983,57(1-4):146-151
The theodolite used in this method is completely leveled by using autocollimation from a free mercury surface. This eliminates the need for striding or hanging levels which are in conventional use to level the trunion axis of the theodolite. Mercury leveling is more accurate and can be performed in a much shorter time than leveling by the striding or hanging levels. In addition, this new method removes the unavoidable axis wobbles contaminating the observed horizontal angles between the star and the azimuth mark. The uncontrolled wobble errors affecting azimuths can be up to three arc seconds. The axis wobbles are removed by using autocollimation from an axis mirror which is perpendicular to the trunnion axis of the theodolite. Autocollimation coincidences from the mercury and from the axis mirror can be made within one or two tenths of an arcsecond. This new method and instrumentation surpasses the obtainable precision by the conventional first-order astro azimuth observations by reducing the unknown systematic wobble and level errors by one order of magnitude. 相似文献
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9.
为满足摄影测量中相机检校的需要,选用一种室内相机检校场的精密测量方法与实验分析方法,对相机检校场进行检校。根据山东科技大学室内三维检校场中标志点的排列规则,点数众多的实际分布特点,选用高精度的经纬仪测量系统,选取最佳的仪器和基准尺摆放位置对检校场内的标志点进行测量。利用统计检验的方法对标志点点位的稳定性进行分析,判断出标志点稳定可以满足相机检校的需要。 相似文献
10.
M. A. R. Cooper 《The Photogrammetric Record》1996,15(87):403-417
A few of the many interesting aspects of the mind, life and work of Robert Hooke (1635-1703) are discussed, particularly some that are relevant to opto-mechanical photogrammetric plotters and cameras. Evidence from primary and secondary sources is presented which indicates that Hooke devised instruments with optical and mechanical components which later came to be used in photogrammetric plotters, that he recognized the value of perspective projection in accurate recording of terrain, and devised a "Picture-Box" for that purpose. The question of how far he progressed in photography in experiments with purple dyes is left open. These "photogrammetric" activities of Hooke's are shown to have been only a small part of his work in London which included duties as Curator of Experiments to the Royal Society, Professor of Geometry at Gresham College, and Surveyor to the City of London Authorities following the Great Fire in 1666. 相似文献
11.
C. D. Burnside 《The Photogrammetric Record》1997,15(89):791-802
This eighth and penultimate extract from the Archive is an unusual one for a number of reasons. Of these the most important one is the fact that it is concerned solely with instruments produced in Great Britain. It is therefore concerned mainly with the Thompson-Watts plotter, the only British instrument to go into full-scale commercial production. Strictly speaking the other instrument included in this extract should not have had a separate entry at all, simply because no instrument of this type exists now and so cannot have an entry in the catalogue of instruments. However, in order to trace the development of the Thompson-Watts Mk 2 plotter, produced in 1963, from the remarkable work of Henry Fourcade carried out in the 1920s, the Barr and Stroud ZA2 plotter based on his work has been accorded an Appendix of its own.
Both instruments in this extract are based on an optical-mechanical solution to the photogrammetric problem of space intersection and the Thompson-Watts is in fact the only instrument of this type to be found in the catalogue. This particular solution did not find great favour on the continent and so few instruments of this type were produced commercially. 相似文献
Both instruments in this extract are based on an optical-mechanical solution to the photogrammetric problem of space intersection and the Thompson-Watts is in fact the only instrument of this type to be found in the catalogue. This particular solution did not find great favour on the continent and so few instruments of this type were produced commercially. 相似文献
12.
Ramsberg Castle is to be restored and renovated to allow a new use of the building. This requires extensive structural and architectural analyses based upon metric documentation. The façades of the castle were recorded photogrammetrically. Photography from the ground was impossible due to the steep terrain on three sides of the building. For this reason, the photographs were taken from a helicopter. A 4 × 5 inch Linh of Metrika réseau camera was used.
Because of the adverse topography, only a few control points could be determined by on-site theodolite measurement. Therefore the control network was achieved by means of photogrammetric bundle triangulation. Stereorestitution was performed using an analytical plotter connected with a CAD system. Drawings at 1:50 scale were then derived from the as-built CAD model. 相似文献
Because of the adverse topography, only a few control points could be determined by on-site theodolite measurement. Therefore the control network was achieved by means of photogrammetric bundle triangulation. Stereorestitution was performed using an analytical plotter connected with a CAD system. Drawings at 1:50 scale were then derived from the as-built CAD model. 相似文献
13.
Terrestrial photogrammetry holds distinct advantages over the conventional theodolite survey or aerial photogrammetry for glacier surveys, on account of inaccessibility of upper reaches of the glaciers and non-suitability of large-scale aerial photography for very high relief areas. The Neh-Nar glacier was mapped with a contour interval of 10 m utilising terrestrial photogrammetric techniques because no large-scale base map of the glacier was available for detailed glaciological studies. This glacier was selected under the International Hydrological Programme. Apart from topographic details various features of glaciological significance like transient snowline, accumulation and ablation zones, bergschrund, icefalls etc., were also mapped. 相似文献
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Bundle triangulation is an efficient tool for spatial point determination in architectural photogrammetry. All the information available in image and object space may be introduced in a combined adjustment yielding high precision and reliability. Camera calibration performed simultaneously with the object restitution process enables the application of convenient and flexible imaging systems based on professional photographic technology. Thus the survey of monuments can be carried out rapidly with a minimum of personnel and equipment. The photogrammetric recording of the basilica of San Francesco in Siena is presented as an example of the application of this survey procedure. The field work was accomplished in a few days. The equipment used consisted of a partial metric camera, an engineering theodolite and a tape. The bundle adjustment results gave spatial object co-ordinates with a r.m.s.e. of ± 15 mm for a point. 相似文献
16.
C. P. Lo 《The Photogrammetric Record》1970,6(36):625-639
The heights of buildings in the city centre of Glasgow have been measured by photogrammetric methods. A comparison of the heighting accuracy with ground checks obtained by the use of a reducing telemeter indicates the possibilities of achieving accurate results by means of photogrammetric instruments and methods. An attempt to present the third dimension of the city on paper has also been made with the Stereosimplex He and the Perspektomat coupled together to form a drawing system. It is hoped that this approach can be further developed so that it will be of use to town planners, urban geographers and others with an interest in the rapid collection of accurate data about cities. 相似文献
17.
S. E. Masry 《The Photogrammetric Record》1973,7(42):728-730
The paper describes a method for the automatic determination of height profiles in the stereomodel. The model is scanned automatically in epipolar planes. The photographic densities are recorded. The density values are correlated, either on or off line, to obtain the height profiles. The method was developed for the analytical plotter but can be applied to other photogrammetric instruments. 相似文献
18.
SPOT立体影象具有良好的基高比和空间分辨率,可以利用解析摄影测量仪器对之进行精确而有效的处理,以求解外方位元素,测制或修测地形图,获取数字高程模型以及制作正射影象。本文分析了SPOT影象的几何特性,建立了SPOT立体象对求解的数学模型。利用作者研制的SPOT影象光束法平差程序、C-100解析测图仪上SPOT象对测图软件和在OR-1正射投影仪上制作SPOT正射影象的相应软件,对法国马赛地区的一对SPOT立体象对进行了试验,获得了满意的结果。 相似文献
19.
王有年 《武汉大学学报(信息科学版)》1987,(2)
在深入研究了联合平差的基本理论后,作者在VAX-11/750小型计算机上建立了一个主要适合于近景摄影测量的联合平差程序系统,它具有粗差的自动定位、系统误差补偿、进行多种观测值的同时平差等多种现代先进的摄影测量平差系统所应具备的功能。本文简要介绍该联合平差程序系统的有关基本理论、基本功能、基本结构及处理有关问题的基本方法,并举例说明联合平差及该程序系统在近景摄影测量中的应用。 相似文献
20.
AbstractObservations of the altitude of stars is a common method for the determination of local time. When the time is required with no great accuracy and when, therefore, simple instruments are employed, the method is particularly suitable. In the conduct of the observation with a theodolite there arise certain questions to which some reference may be made here with a view to lending some assistance to the student. 相似文献