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:: [Wednesday, June 8, 1994]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: [Joint ISPRS/ GIS '94 Plenary III]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: THE USE OF GPS FOR GIS GEOREFERENCING: STATUS AND APPLICATIONS M. Elizabeth Cannon

Document type:: Monograph

Structure type:: Chapter

y, INS have 5 shown the of required ne so a cost- S attitude an either be ceiver with ch antenna ed of several 93 in a joint ‘algary and eivers were vessel with as collected 9) derive the he test, the id when the lerived from . was at the 'ment of 1.1 ons of the in Figure 7. ity of using e attitude ese systems nvironment ceiver costs. information 47000 48000 y) 1e 93 Test NS ipplications and remote landing of an will not e found in The University of Calgary has been involved with the development of GPS and GPS/INS systems for precise aircraft positioning and attitude determination aimed at the minimization or elimination of ground control in mapping applications. The accuracy requirements for such a system are generally dependent on the system in use as well as on the flying altitude. In general, the requirements are at the level of 10 cm or better for large-scale photogrammetry while they are relaxed to about 0.5 m for many remote sensing applications. GPS attitude is in general not sufficiently accurate for mapping applications, where the requirement may be in the order to 10-20 arcseconds. A description of the approach to GPS/INS integration for remote sensing can be found in Schwarz et al. (1993) and Sun et al. (1994). Several flight tests have been carried out to confirm the feasibility of using GPS or GPS/INS for precise aircraft positioning. One of the difficulties is confirming the achievable accuracy during such tests since an independent system is required. One alternative is the use of inverse photogrammetry, where ground control is used to determine the coordinates of the GPS antenna which then can be compared to the estimated GPS coordinates, for example. Another concept is to build redundancy in the number of airborne and ground GPS receivers so independent aircraft trajectories can be compared. This concept is described in Shi and Cannon (1994) for the case when four receivers are used, two in the aircraft and two on the ground. In this test, baselines of over 100 km generated positioning accuracies at the 10-20 cm level when dual frequency carrier phase measurements are used with precise ephemerides. [4 —20 m—»| Fig.8: Aircraft-to-Aircraft Positioning Concept with Four Receivers Many other applications in the airborne environment exist, with one being the precise positioning of one aircraft with respect to another. This work is being conducted between The University of Calgary and the U.S. for application in their magnetics program (Lachapelle et al., 1994). The concept is shown in Figure 8. Several tests have been conducted with the system and results show that cm-level positioning can be achieved between the two aircraft if an on-the-fly algorithm is used in the data reduction. 7. CONCLUSIONS This paper summarized the current status of GPS and outlined the various classes of receivers that are currently available. With the arrival of the operational phase of GPS, and the reduction of GPS receiver costs, the number and breadth of GPS applications is growing at a fast rate. Various modes of acquiring data with GPS were reviewed. Several applications using GPS were presented with the main focus being on kinematic applications for land, marine and airborne environments. Overall, the pace of GPS activities is accelerating and it is expected that it will play an important continued role in the development of GIS. REFERENCES Alsip, D. (1993). Implementation of the U.S. Coast Guard's Differential GPS Navigation Service. Proceedings of the ION 49th Annual Meeting. Cambridge, June 21-23, pp. 707-716. Bossler, J.D., K. Novak (1993). Mobile Mapping Systems: New Tools for the Fast Collection of GIS Information. i Ottawa, March 23-25, pp. 306-315. Cannon, M.E. (1990), High-Accuracy GPS Semikinematic Positioning: Modeling and Results, Navigation, Journal of the Institute of Navigation, Vol. 37, No. 1, pp. 53-64. Cannon, M.E., and G. Lachapelle (1992), Analysis of a High Performance C/A Code GPS Receiver in Kinematic Mode, Navigation, Journal of the U.S. Institute of Navigation, Vol. 39, No.3, pp 285-299. Cannon. M.E., E. Berry and M. King (1993), Testing a Lightweight GPS/GIS Receiver for Sub- Metre Accuracies, Proceedings of ION GPS-93, Salt Lake City, September 22-24. Frodge, S.L., B. Remondi and D. Lapucha (1994), Results of Real-Time Testing and Demonstration of the U.S. army Corps of Engineers Real-time On-the-Fly Positioning System, Proceedings of the FIG XX Congress, Melbourne, March 6-12. 171

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