Showing papers on "Photogrammetry published in 1970"

Stereo Radar Analysis

Abstract: : The topographic accuracy of the AN/APQ-102(XA-2) side-looking radar and its specific applicability to 1:50,000 and 1:250,000 scale topographic mapping were tested using stereo radar techniques with real data. The two basic stereo configurations, opposite-side and same-side, were tested. Also tested was the geometric fit of each individual radar record to the established ground control. Although original plans called for a test area 25 miles long by 4 miles wide, shortcomings in the data actually acquired led to adoption of a much smaller test area. Moreover lack of certain collateral data required development of a special reduction technique based upon ground control in the test area. Photogrammetric aerotriangulation of aerial photography flown simultaneously with the radar provided a means of defining the flight path. Ground points in the test area were also aerotriangulated, and used as control and as the standard for measuring radar accuracy. The test results were surprisingly good, with the opposite-side stereo configuration providing the better accuracy. Average root mean square (RMS) values of 7.7 meters, 12.1 meters and 13.2 meters in X(across-track), Y(along-track) and Z(elevation), respectively, were obtained for the opposite-side case; corresponding RMS values of 9.5 meters, 20.0 meters and 16.7 meters were obtained for the same-side case. Results from fitting the individual radar records to the aerotriangulated positions also demonstrated excellent geometric fidelity in the radar imagery.

Study of Potential Application of Holographic Techniques to Mapping.

Abstract: : The report is primarily concerned with the precision and pointing at a holographically produced image. After consideration of several possibilities, measurements performed by placing a small self-illuminated dot within the space of the virtual image from the hologram proved to be most feasible. It is shown that images from holograms can be measured by use of a floating dot in a manner similar to that used in mensuration of photogrammetric stereomodels. Simulation studies were performed and indicated that shifts in the reconstruction beam angle of up to 5 degrees could be tolerated. A shift of larger than 5 degrees caused large distortions in the image geometry which could not be removed by a linear transformation. The investigation is in three parts; concise discussion of the properties of holography and photogrammetry; theoretical imaging characteristics; and mensuration. (Author)

A Quantitative Study of Biological Form

Abstract: The technique of analytical photogrammetry has been applied to the problem of precisely specifying some of the spatial features of the growing mouse. In particular, the surface area and volume have been determined, and contour maps prepared. It is shown that the variations in weight, surface area, and volume are well represented by third-order polynomials.

Applications of Airborne Remote Sensing Technology

Abstract: Aerial photography has been used for nearly a century. Recent developments in aerial photography, such as color film, color infrared film, and multiband photographic systems, have greatly increased the amount of useful information obtainable from aerial photographs. Remote sensing instruments that operate in different parts of the electromagnetic spectrum from the human eye and photographic sensors can detect many things beyond the scope of human and photographic sensors. Thermal imagery can detect thermal pollution entering streams. Side-looking airborne radar can map terrain day or night, almost without regard for weather conditions. Remote sensing instruments having civil engineering applications are described herein. The emphasis is on photography, thermal imagery, multispectral imagery, and side-looking airborne radar. Applications of airborne remote sensing technology to soils mapping, water pollution detection and monitoring, and urban and regional planning are illustrated.

Fidelity of space TV

Abstract: Essa 7, Surveyor 7 and Mariner 4 space TV systems geometric distortions analysis and potentials in analytic photogrammetry and topographical mapping

Television from space

Abstract: THE EARTH RESOURCES SATELLITE WILL INCLUDE THREE HIGH- RESOLUTION TELEVISION CAMERAS, EACH OPERATING ON A DIFFERENT SPECTRAL BAND. IN MANY APPLICATIONS, SUCH AS LAND-USE SURVEYS, THE DATA WILL BE CORRELATED WITH TOPOGRAPHIC MAPS. HOWEVER, TELEVISION SYSTEMS ARE SUBJECT TO PHOTOGRAMMETRIC ERRORS, AND PRE-PROCESSING OF THE DATA IS NECESSARY IF THE DESIRED PHOTOGRAMMETRIC QUALITY IS TO BE ACHIEVED. THE HIGH- RESOLUTION SYSTEM OF THE EARTH RESOURCES MISSION MUST BE PROCESSED IN REAL TIME INCLUDING CORRECTIONS FOR PHOTOGRAMMETRIC ERRORS SUCH AS SCALE, SKEW, ROLL, YAW, PITCH, EARTH ROTATION, ETC. /PE/

Technique for producing a pseudo three- dimensional effect with monoscopic radar imagery

Abstract: Pseudo three dimensional effect on monoscopic radar imagery for topographic relief differentiation, using offset superposition of transparencies

A Review Of Current Research In 3-D Machine Vision And Robot Accuracy

Abstract: It has been shown that the major contributor to down time in robot automated production lines is error in positioning. The faults that cause such errors can be corrected for provided they are identified early enough. Conventional instrumentation, such as displacement measurement probes, is unsuitable for the task, since the number of fixed transducers results in high costs. This review supports a programme of research to measure robot position and repeatability using a non-invasive optical technique based on photogrammetric principles. This paper reviews the following areas: 1. General 3-D machine vision. 2. Photogrammetry and camera calibration. 3. Robot accuracy.

Stereo-photogrammetric system

Abstract: Stereo-photogrammetric method and apparatus for the metric evaluation and restitution of stereoscopic photographs of an object in numerical and graphical displays.

Modern day surveys for highway location and design

Abstract: Spin-offs of space technology and defense oriented research projects present the highway engineer with adequate means of surveying to demand requirements. Descriptions are presented for various distance measuring instruments and photobase plans. A research project to evaluate cross sectioning by photogrammetry reveals the capabilities of several stereo plotters, aerial film, ground control, and aerial photographic procedures. The use of analytical photogrammetry in matters involving ground position determination and measurement is evaluated by several research projects. Using techniques available today, route surveys can be conceived and implemented in all stages by management-level engineers.

Application of aerial photographs and remote sensing imagery to urban research and studies

Abstract: THE IMPRESSION THAT REMOTE SENSING TECHNIQUES HAVE BEEN APPLIED ONLY SPARINGLY IN URBAN ANALYSES IS MOST LIKELY ATTRIBUTABLE TO THE FACT THAT URBAN IMAGERY INTERPRETATION IS NOT CONFINED TO A SINGLE DISCIPLINE, AND RESEARCH FINDINGS ARE SCATTERED THROUGH A NUMBER OF JOURNALS AND GOVERNMENTAL REPORTS. THE PURPOSE OF THIS BIBLIOGRAPHY IS TO ELEVIATE THE PROBLEM AND TO BRING UNDER ONE VOLUME ALL MAJOR STUDIES TREATING IMAGE INTERPRETATION IN URBAN ANALYSES. THIS BIBLIOGRAPHY CONSTITUTES THE LARGEST AND MOST UP-TO-DATE COLLECTION OF URBAN STUDIES THAT WERE BASED ON REMOTE SENSING TECHNIQUES. THE LISTINGS INCLUDE TW0 TYPES OF INVESTIGATIONS: (1) THOSE WHICH HAVE APPLIED SENSING IMAGERY TO THE SOLVING OF A SPECIFIC PROBLEM, AND (2) STUDIES THAT HAVE REVEALED THE POTENTIAL OF USING A SENSOR IN URBAN ANALYSES. /AUTHOR/

Applications of Photogrammetry in Mining Surveying

Abstract: An attempt is made to classify the applications of photogrammetry to mining problems. Examples of practical applications of photogrammetry in mapping and profiling open pits, surface and undergroun...

Highway location and design utilizing photogrammetric terrain data terrain data

Abstract: THE PRACTICES OF THE PENNSYLVANIA DEPARTMENT OF HIGHWAYS IN USING PHOTOGRAMMETRIC METHODS FOR LARGE-SCALE TOPOGRAPHIC MAPPING AND PRODUCTION OF CROSS SECTIONS FROM STEREOSCOPIC MODELS ARE DESCRIBED. THE MAJOR BENEFIT DERIVED FROM THESE METHODS HAS ACCURED TO DESIGN LOCATION, BUT THEY ARE ALSO EMPLOYED IN FINAL DESIGN AND EARTHWORK QUANTITIES. THE EQUIPMENT, PROCESS SEQUENCE, COMPUTER PROGRAMS, AND OUTPUT OF THE PROCESS ARE DESCRIBED. NEW APPROACHES IN DETERMINATION OF FINAL PAY QUANTITITES AND AN INTEGRATED DESIGN CONCEPT ARE DISCUSSED.