Photogrammetric Developments in the Ordnance Survey in 1990

Newby, Paul

doi:10.1111/j.1477-9730.1990.tb00717.x

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…Several patches have to be combined and adjusted both geometrically and radiometrically to form an equivalent single image. This approach is conceptually identical to solutions adopted by reseau‐scanning cameras (Luhmann and Wester‐Ebbinghaus, 1987; Wester‐Ebbinghaus, 1990), analytical stereoplotters (Ackermann, 1984) and digital comparators (Newby, 1990). Digitised partial images are assembled numerically by means of reseau crosses with known coordinates.…”

Section: Calibration Of Tk‐350 Framesmentioning

confidence: 98%

Accuracy analysis, dem generation and validation using russian tk‐350 stereo‐images

Büyüksali̇h

Kocak

Oruç

et al. 2004

The Photogrammetric Record

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TK-350 stereo-scenes of the Zonguldak testfield in the north-west of Turkey have been analysed. The imagery had a base-to-height ratio of 0AE52 and covered an area of 200 km · 300 km, with each pixel representing 10 m on the ground. Control points digitised from 1:25 000 scale topographic maps were used in the test. A bundle orientation was executed using the University of Hanover program BLUH and PCI Geomatica OrthoEngine AE software packages. Tests revealed that TK-350 stereo-images can yield 3D geopositioning to an accuracy of about 10 m in planimetry and 17 m in height. A 40 m resolution digital elevation model (DEM) was generated by the PCI system and compared against a reference DEM, which was derived from digitised contour lines provided by 1:25 000 scale topographic maps. This comparison showed that accuracy depends mainly on the surface structure and the slope of the local terrain. Root mean square errors in height were found to be about 27 and 39 m outside and inside forested areas, respectively. The matched DEM demonstrated a systematic shift against the reference DEM visible as an asymmetric shift in the frequency distribution. This is perhaps caused by the presence of vegetation and buildings.

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Section: Calibration Of Tk‐350 Framesmentioning

confidence: 98%

Accuracy analysis, dem generation and validation using russian tk‐350 stereo‐images

Büyüksali̇h

Kocak

Oruç

et al. 2004

The Photogrammetric Record

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Digital images in the map revision process

Newby¹

1996

ISPRS Journal of Photogrammetry and Remote Sensing

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Digital Photogrammetry at the Institut Cartografic De Catalunya

Colomer

Colomina

1994

The Photogrammetric Record

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Since its foundation in 1982, the Institut Cartogràfic de Catalunya has been dealing with digital images. Though digital images and techniques were initially confined to remote sensing, they have been gradually transferred to and combined with photogrammetry. In addition to the development of remote sensing and digital orthophotography systems, this expertise has facilitated the introduction of commercially available digital photogrammetric systems (scanning and stereocompilation) which are now in full operation. The paper describes the experience in scanning, orthophotography production and stereocompilation, draws some conclusions and gives an insight of the future of digital photogrammetry. Résumé L‘Institut Cartographique de Catalogue s‘est intéressé au traitement des images numériques depuis le moment où il a été crée, en 1982. Bien qu'au début les images numériques et leur technologie aient été réservées à la télédétection, elles se sont trouvées peu à peu transférées et intégrées à la photogrammétrie. Ce savoir‐faire a permis le développement des systèmes de télédétection et ď orthophotographie numérique et a, de plus, facilité la mise à disposition sur le marché de systèmes de photogrammétrie numérique qui sont maintenant pleinement opérationnels. On présente dans cet article ľ expérience acquise dans le domaine du balayage, de la production des orthophotographies et de la stéréocompilation, on en tire quelques conclusions et ľ on termine par un aperçu sur ľ‘avenir de la photogrammétrie numérique. Zusammenfassung Seit seiner Gründung im Jahre 1982 hat sich das Institut Cartogràfic de Catalunya mit digitalen Bildern beschäftigt. Obwohl digitate Bilder und Verfahren ursprünglich auf die Fernerkundung begrenzt waren, wurden sie schrittweise auf die Photogrammetrie übertragen bzw. mit ihr kombiniert. Zusätzlich zur Entwicklung von Fernerkundung und digitaler Orthophoto‐Systeme hat diese Erfahrung die Einführung kommerziell verfügbarer digitaler photogrammetrischer Systeme erleichtert, die jetzt überall in der Praxis angewendet werden. Der Beitrag beschreibt die Erfahrung bei der Abtastung, der Herstellung von Orthophotos und bei der Stereoauswertung und gibt einige Schluβfolgerungen und Aussichten in bezug auf die Digitalphotogrammetrie wieder.

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Photogrammetric Developments in the Ordnance Survey in 1990

Cited by 3 publications

References 6 publications

Accuracy analysis, dem generation and validation using russian tk‐350 stereo‐images

Accuracy analysis, dem generation and validation using russian tk‐350 stereo‐images

Digital images in the map revision process

Digital Photogrammetry at the Institut Cartografic De Catalunya

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