نتایج جستجو برای: aerial photos

تعداد نتایج: 37790  

The instability and mobility of sand dunes is a major concern of planning and management in arid coastal plains. The aim of this study is to identify morphogenetic characteristics of sand masses and their locations, as well as to identify the processes that formed and transported them in the western part of the Makran coastal plain. Research data and tools were including spatial distributions o...

2010
Quan Wang Suya You

This paper proposes a novel automatic image registration method designed for urban scenes containing tall 3D objects under significant viewpoint changes. Our method is based on the fusion of two kinds of features: the interest regions and the edge groups, which we believe are more suitable than conventional local textures for such scenes. Many existing methods face matching difficulty either be...

2010
J. F. Custodio da Silva

The Bayesian inference along with the step-by-step technique allows foresee a possibility to increase the efficiency and reliability of phototriangulation. It also appears to improve the strength of the block, in order to increase the economy with respect to control points. The used methodology consists on simulation of a 25 points mesh, from which a block of aerial photos is generated. Random ...

2008
Hongjoo Park

Various methods have been developed to measure three-dimensional (3D) objects and obtain a highaccuracy Digital Surface Model (DSM). High-quality elevation data is essential to support urban planning and civil engineering, however, effective measuring of height information is still challenging. The aim of this paper is to present an accuracy assessment of laser scanned data and the enhancement ...

2004
Thomas R. Jordan

Vegetation mapping of national park units in the southeastern United States is being undertaken by the Center for Remote Sensing and Mapping Science at the University of Georgia. Because of the unique characteristics of the individual parks, including size, relief, number of photos and availability of ground control, different approaches are employed for converting vegetation polygons interpret...

2005
E. Papageorgiou V. Sakkas

The present paper focus on the rectification of QuickBird imagery (Standard PSM True Color image) in order to update the urban planning of Parikia (Paros island, Greece). Although the spatial resolution is sufficient for such application and the radiometric information is often better than the case of existing aerial photos, an accurate geometrical calibration is needed.The methods applied in t...

2004
Mara Helmuth Teresa Davis

Geological data from measurement of sediment granulation over a 24 hour period in a lake formed by the Matanuska Glacier in Alaska was applied to synthesis parameters. The parameters measured include time, grain size and grain frequency. Several mapping strategies were employed to generate different types of additive and granular synthesis sound materials: 1) time to event grouping, sediment gr...

2006
Wieland Schwinger Christoph Grün Birgit Pröll Werner Retschitzegger Hannes Werthner

Location-based systems in the area of tourism, so-called mobile tourist guides, combine geographic information and tourism information in order to deliver relevant content to tourists on the spot. Existing systems often adhere to a heavy-weight approach. This means that, firstly, some do not build on existing tourism information systems, secondly, most of them do not employ standards for access...

2001
Karsten Jacobsen

The georeference of any photogrammetric product is based on the reconstruction of the geometric relations of imaging in a chosen object coordinate system. For the handling of aerial photos traditionally the bundle of rays from the image points over the projection center to the ground points is modelled by means of the camera calibration information and the exterior orientation determined by mea...

2017
Songsheng LI

Although technology has advanced at breathless pace, wildfire still bursts out every year all over the world. There are various wildfire monitoring system employed in diferrent countries, most of them are depended on photos or videos to identify features of wildfire, after wildfire happened. Delay of confirmation is diverse based on used techonologies. An autonomous forest patrol system by Unma...

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