XVIIIth Congress: XVIIIth Congress

Kraus, Karl; Waldhäusl, Peter

Bibliographic data

Multivolume work

Persistent identifier:: 1667435949

Title:: XVIIIth Congress

Sub title:: Vienna, Austria 1996

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667435949

Language:: English

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing

Document type:: Multivolume work

Volume

Persistent identifier:: 1667438379

Title:: XVIIIth Congress

Scope:: 449 Seiten

Year of publication:: 1996

Place of publication:: Vienna

Publisher of the original:: Austrian Society of Surveying and Geoinformation

Identifier (digital):: 1667438379

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(31,B2)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist anhand des Copyrightjahrs ermittelt.

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

Editor:: Kraus, Karl; Waldhäusl, Peter

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 18., 1996, Wien; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis

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:: Volume

Collection:: Earth sciences

Chapter

Title:: PHODIS AT - An Automated System for Aerotriangulation Josef Braun, Liang Tang and Rasmus Debitsch

Document type:: Multivolume work

Structure type:: Chapter

PHODIS AT - An Automated System for Aerotriangulation Josef Braun, Liang Tang and Rasmus Debitsch Carl Zeiss, D-73446 Oberkochen, Germany Commission II, WG II/5 KEY WORDS: Surveying, Automation, Triangulation, Aerial, Digital, Automatic Aerotriangulation ABSTRACT Aerotriangulation is an essential task in photogrammetry. The most laboured and time-consuming work in an analytical aerotrian- gulation is still the block preparation and measurement of tie and control points. To meet the needs from the photogrammetric practice, an automated system for aerotriangulation was developed. The system is called PHODIS AT and is a new member of the digital photogrammetric image processing system PHODIS from Carl Zeiss. The system is composed of the block preparation, the fully automatic tie point determination, the semiautomatic control point measurement and the interface to diverse block adjustment programs. The key feature of the system is the fully automatic determination of tie points in images of a block. Components of PHODIS AT are described in this paper. First results achieved by processing various blocks from the photogrammetric practice are presented and evaluated. It could be shown that the aerotriangulation conducted by PHODIS AT can reach the same level of accu- racy as that of the analytical one and is even much more economic for the practice. KURZFASSUNG Die Aerotriangulation ist eine essentielle Aufgabe der Photogrammetrie. Die Blockvorbereitung und Punktmessung ist bis heute die mühevollste und zeitaufwendigste Arbeit in der analytisch durchgeführten Aerotriangulation. Um den Anforderungen der pho- togrammetrischen Praxis gerecht zu werden, wurde ein automatisches System für die Aerotriangulation entwickelt. Das System hei&t PHODIS AT und ist Teil des digitalen photogrammetrischen Bildverarbeitungssystems PHODIS von Carl Zeiss. Das System unterstützt die Blockvorbereitung, die vollautomatische Verknüpfungspunktmessung, die semiautomatische PaBpunktmessung und verfügt über eine Schnittstelle zum AnschluB unterschiedlicher Blockausgleichungsprogramme. Der Kern des Systems ist jedoch die vollautomatische Messung von Verkniipfungspunkten in Bildern eines Blockes. Im vorliegenden Beitrag werden die Kompo- nenten von PHODIS AT beschrieben. Die ersten Ergebnisse, die durch die Bearbeitung verschiedener Blöcke aus der photogram- metrischen Praxis erzielt wurden, werden vorgestellt und beurteilt. Es zeigt sich, daß die Aerotriangulation mit PHODIS AT das- selbe Genauigkeitsniveau erreichen kann wie die analytische Aerotriangulation, aber viel wirtschaftlicher für die Praxis wird. 1 Introduction Aerotriangulation is an essential task in photogrammetry. Digital photogrammetry is characterized by the high automa- tion of individual processing procedures and brings much more economy to the photogrammetric practice. Digital terrain models, for instance, can be generated automatically from digital or digitized aerial images and so can digital orthoimages thereafter. Using digital techniques, aerotriangulation can also be automated now in order to meet the needs from the practice. Since early nineties, research and development of algorithms for automating aerotriangulation have been conducted at sev- eral institutions (eg. Tsingas, 1992; Schenk/Toth, 1993; Tang/Heipke, 1993; Ackermann/Tsingas, 1994; Toth/Krupnik, 1994) and now a stage has been reached for practical realiza- tion (eg. Ackermann, 1995; Krzystek et al., 1995; Mayr, 1995; Schenk, 1995; Tsingas, 1995). PHODIS AT is a system that affords fully automatic tie point determination and semiautomatic measurement of control points for aerotriangulation. The high degree of automation offered by PHODIS AT simplifies and accelerates block prepa- ration and post-processing considerably. Errors that occur in classical aerotriangulation due to misinterpretations or wrong entries are virtually excluded with PHODIS AT by means of its automated procedures and program checks. PHODIS AT is a new member of the digital photogrammetric image processing system PHODIS from Carl Zeiss. A complete digital photogrammetric production chain can be established by PHODIS members (cf. Table 1). Using the chain, the whole photogrammetric production can be conducted in a very eco- nomic way as mentioned before and, on the other hand, digital products make a direct integration of photogrammetry with geographic information systems possible. In this sense, PHODIS AT plays a very essential role for further automatic procedures. Table 1: PHODIS Product family PHODIS Product | Photogrammetric Application PHODIS SC photogrammetric scanning system PHODIS AT automated digital aerotriangulation PHODIS ST digital stereoplotting PHODIS TS automatic DEM generation PHODIS OP digital orthoprojection PHODIS M monoplotting PHODIS Base basic PHODIS tools During the conception of PHODIS AT, special attention was payed to the following aspects: * Ease of operation, * Handling of any block configurations, * Handling of large blocks which cannot be measured in one run due to the huge amount of data, * Robust tools for the fully automatic determination of tie points and the semiautomatic measurement of control and new points, Data compatibility with various block adjustment pro- grams, * Integration in the work flow of PHODIS and analytical plotting systems controlled by programs such as PHOCUS and P-CAP. International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B2. Vienna 1996 the k simp cour: deriv vide lutel: PHO With grapl and « The files com] Beca may to al

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