Results 111 to 120 of about 1,960 (165)

Orthophoto – Orthophoto Map – Base Map Revision

The Canadian Surveyor, 1968
In this paper, methods for the production of orthophoto maps are discussed, with special reference to the cartographic treatment. Also, a description is given of a fast method of revising basic maps.
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Minsden Chapel Orthophotos

2021
Photogrammetry survey of the chapel to produce a 3D model and drawings prior to restoration works.
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Research of digital orthophoto map load based on orthophoto information entropy

SPIE Proceedings, 2009
At present, with the development of the affection in different layouts and decision-makings of orthophotomap in various fields, the information quantity of digital orthophoto map reflects and decides the affection of decision- makings on deep degrees, and it affects the dependability of analytical result, thereby, to perfect the outputs of digital ...
Na Yang, Zhanmu Zhang, Zhiyuan Qin, Jie Rui, Ersen Li, Lina Geng   +5 more
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Further Extension of the Orthophoto Technique

The Canadian Surveyor, 1968
Stressing basic differences between a conventional map and an orthophoto map, the author advances further concepts in the development of the orthophoto technique.
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Transfer of Resolution in the Production of Orthophotos

The Canadian Surveyor, 1970
The progressive loss of resolution was determined for the various steps involved in producing optically-projected orthophoto prints. The first test object was a set of low-contrast annular targets placed at the focus of a collimator in the laboratory. A film negative, with images of the test object across both diagonals, was made in a Wild RC8 camera ...
Stanley H. Collins, Zdenek Kalensky
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The true orthophoto generation method

2012 First International Conference on Agro- Geoinformatics (Agro-Geoinformatics), 2012
This paper presents the process of true orthophoto generation, including the occlusion detection and compensation. The Z-buffer method is applied here to detect the occlusion regions. Then the neighboring images are used to fill up the occlusions. A valid-pixel-based image inpainting method is proposed for compensating the rest occlusions.
Xiao Wang, Xia Zhang, Jinnian Wang
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Recognizing cars in aerial imagery to improve orthophotos

Proceedings of the 15th annual ACM international symposium on Advances in geographic information systems, 2007
The automatic creation of 3D models of urban spaces has become a very active field of research. This has been inspired by recent applications in the location-awareness on the Internet, as demonstrated in maps.live.com and similar websites. The level of automation in creating 3D city models has increased considerably, and has benefited from an increase ...
Franz Leberl, Horst Bischof, Helmut Grabner, Stefan Kluckner   +3 more
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Mapping eelgrass beds with orthophotos

2018
Mapping the distribution of eelgrass is important for optimal management of eelgrass meadows, a key organism in coastal ecosystems. The many ecosystem functions and services that eelgrass beds provide, scale directly with their distribution area. We have evaluated the potential in using orthophotos, that Aarhus University has bought for other purposes,
Ørberg, Sarah Bachmann, Groom, Geoffrey Brian; id_orcid 0000-0003-3820-6621, Kjeldgaard, Ane, Carstensen, Jacob, Rasmussen, Michael Bo, Clausen, Preben; id_orcid 0000-0001-8986-294X, Krause-Jensen, Dorte; id_orcid 0000-0001-9792-256X   +6 more
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Research on the Occlusion Processing Method for True Orthophoto

2013 Seventh International Conference on Image and Graphics, 2013
An optimized occlusion detection method for true orthophoto make is proposed in this paper, aimed at solving the occlusion and shadow problems caused by rectification using digital surface model (DSM). This method draws lessons from sweep way of angle-based detection method and idea of radial tracing detection method.
Fangming Qian, Liu Wei
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Orthophotomaps from digital orthophotos

Photogrammetria, 1985
Abstract After explaining the contents of an analog orthophotomap, the production of digital orthophotomaps is described. The process consists of the production of: - map surface (here: digital orthophoto), - map frame, - map lettering (including marginal data), - sheet assembly of the orthophotomap.
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