Systems for data processing, anaylsis and representation

Allam, Mosaad; Plunkett, Gordon

Bibliographic data

Monograph

Persistent identifier:: 1067490280

Title:: Systems for data processing, anaylsis and representation

Sub title:: ISPRS Commission II Symposium : June 6 - 10, Ottawa, Canada

Scope:: 1 Online-Ressource (XX, 530 Seiten)

Year of publication:: 1994

Place of publication:: Ottawa

Publisher of the original:: The Surveys, Mapping and Remote Sensing, Natural Resources Canada

Identifier (digital):: 1067490280

Illustration:: Illustrationen

Signature of the source:: ZS 312(30,2)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Allam, Mosaad; Plunkett, Gordon

Corporations:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Adapter:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Founder of work:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Other corporate:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: [Tuesday, June 7, 1994]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: [Session D-1 Commission II - Special Project - Upgrading Photogrammetric Instruments]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: Upgrading Photogrammetric Instruments Patrick Wong, MA

Document type:: Monograph

Structure type:: Chapter

wa, 9to- Wa, et IEL, isant à travaux dans la le a la Upgrading Photogrammetric Instruments Patrick Wong, MA |.S.M. International Systemap Corp. Suite 777 - 650 Georgia Street, Vancouver, B.C. V6B 4N7 Tel:(604) 684-3750 Fax:(604) 684-9750 ABSTRACT Analog photogrammetric instruments can be upgraded by encoding/interfacing to CAD software. Encoding system designs include the utilization of rotary or linear encoders mounted on the photo or model coordinate axes. Typical interfacing technology utilize solid-state "cards" for popular PC-Compatible CPU's. CAD software system may have been created specially for digital mapping or adapted from generic off-the-shelf packages. A more radical approach is the full conversion to analytical operations. Such approach requires special mechanical engineering and computerized "plate control" system. A better integration with CAD software is also effected. The cost/benefit analysis however, may not justify the upgrading of a typical analog instrument any longer due to the availability of affordable digital image based systems. In any case, the demand for digital image products can never be supported by upgraded analog or analytical instruments. KEY WORDS Instrument encoding, calibration, digital mapping system, stereo superimposition. 1.0 INTRODUCTION irreversible. Most of these designs retain nothing more than the viewing and the plate carrier sub-systems of the original Photogrammetric instruments based on the simulation (or ^ instrument. The "Space Rod" and other mechanism that were analog) principle have been in production for more than 45 used to maintain a parallax-free model are replaced with a servo- years. Many of the early models of these, so called analog motor driven system controlled by analytical photogrammetry instruments, are still in use world-wide despite the advent of ^ software. the analytical plotter and digital image workstations. Instruments that are still in active duties include WILD A7, A8, A10, AMU/H, B8, AG1; ZEISS D2/3, E2/3; JENA Stereometrograph & Topocart models; Kern PG2 and some Santoni models. A more conservative approach in analog instrument up-grading may include instrument encoding, viewing systems modification and graphic system interfacing. ISM concentrates on providing a "turn-key" service in this approach. This paper will report ISM's experience in the field and provide some recommendations based on those experiences. This paper will also offer some of our insights as to the future of analog instrument upgrading. In the late 1970's it was apparent that Analytical Plotters and digital mapping were to be the way of the future. Many manufacturers offered retrofit systems for the existing late model instruments so that digital mapping could be performed. All of these "up-grades" included some form of instrument encoding with 2.0 GENERAL CONSIDERATIONS IN INSTRUMENT UP- an interface device connected to a computerized graphic system. GRADING For example, WILD offered the Synercom-Infomap interface, ZEISS offered the Intergraph IGDS interface and KERN offered ISM realized from the outset that digital systems are "unforgiving". the PC-PRO interface. Imperfections in the instruments (instrument errors) are brutally : revealed in numerical form. It is therefore extremely important that y early 1980s however, fne major manufacturers had ali but Users should understand that an instrument in good repair is horn fom upgrading analog instrument nd Wee necessary to support a digital conversion. |SM has also learned concentrating their efforts on Analytical Plotters. Despite the lack that many instruments were instaled in less than ideal of support from the major manufacturers, a thriving after-market ments with little or no maintenance. In order to avoid instrument up-grading industry developed. SM. International ing instrument errors with software algorithm problems, ISM Systemap Corp. (ISM), amongst others, offers such services. always offered, and occassionally insisted on a full instrument One approach to up-grading is a full "analytical" conversion of the service and calibration performed along with the up-grading. Instrument. This approach is more radical in that the process is Many late model analog instruments were factory encoded because the instruments were intended for "digital" aerial 81

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