نتایج جستجو برای: Ikonos

تعداد نتایج: 845  

2005
Xutong Niu Feng Zhou Kaichang Di Rongxing Li

Stereo high-resolution satellite imagery, such as Space Imaging’s IKONOS (1 m resolution) and DigitalGlobe’s QuickBird (submeter resolution), can provide accurate three-dimensional (3D) mapping products. Based on the rational function model, this study investigated the integration of IKONOS and QuickBird images. One pair of stereo IKONOS images and one pair of stereo QuickBird images, collected...

2001
Mahendra Kumar

Availability of high-resolution imagery, such as IKONOS (from Space Imaging Corp), has opened new possibilities for satellite-based mapping. This paper aims to share the practical experience of authors in using IKONOS imagery for mapping application in a production environment. Authors are involved in an IKONOS based land-cover mapping project jointly undertaken by Intergraph Philippines Corpor...

2004
X. WANG

A detailed assessment of the planimetric accuracy of high-resolution (1 m) panchromatic Ikonos orthoimage products for three different test sites located in the State of Missouri is presented. The main objective of this study was to evaluate the potential of Ikonos orthoimage products for use as digital image basemaps in local government GIS systems. For maximum utility and adoption in a wide v...

2003
Kaichang Di Ruijin Ma Jue Wang Ron Li

Shoreline mapping and shoreline change detection are critical in many coastal zone applications. This paper presents results of the semi-automatic mapping of a coastal area of Lake Erie using 4-meter resolution multispectral (XS) and 1-meter resolution panchromatic (Pan) IKONOS Geo stereo images. An overview of the geometric processing of IKONOS imagery is presented. Then, the latest results of...

2001
CLIVE S. FRASER EMMANUEL BALTSAVIAS ARMIN GRUEN

An investigation of the application of 1m Ikonos satellite imagery to 3D building reconstruction is reported. The focus of the evaluation has been upon geopositioning accuracy, radiometric quality and attributes of the imagery that support building feature extraction. Following an initial review of characteristics of the Ikonos system, the multi-image dataset employed is described, along with t...

2002
Taejung Kim Yong-Jo Im

This paper reports experiments carried out for automated extraction of a digital elevation model (DEM) from satellite images. In particular, this paper focuses on DEM extraction from dense urban areas where there are occlusions, shadow and height discontinuities. These properties have been known to create many problems in stereo matching and for automated DEM extraction. Using satellite images ...

2008
Robert Black

Upon completion of the SRTM project, assessing the accuracy of the SRTM elevation data and its correlation to conventional photogrammetric methods has been a focus for many research projects. To date, elevation models derived from OrbView-3 and IKONOS have not had a significant number of comparisons to SRTM data. This study attempts to quantify the relative differences between elevation data co...

2002
J. R. Kim

New high-resolution satellite images such as those from IKONOS provide potentially useful information for the identification of individual surface objects such as trees and buildings compared with previous satellite image sources (e.g. SPOT, Landsat). However, the detailed structure of buildings and trees is still ambiguous for the application of existing machine vision algorithms, mainly due t...

2005
Thierry Toutin

Digital terrain models (DTMs) were extracted from high-resolution stereo images (SPOT-5, EROS-A, IKONOS-II and QuickBird) using a three-dimensional universal physical model developed at the Canada Centre for Remote Sensing, Natural Resources Canada. DEMs were generated using an area-based multi-scale image matching method and then compared to 0.2-m accurate lidar elevation data. Elevation linea...

2002
Kaichang Di Jue Wang Ruijin Ma Ron Li

Shoreline mapping and shoreline change detection are critical for safe navigation, coastal resource management, coastal environmental protection, and sustainable coastal development and planning. This paper reports the results of IKONOS geopositioning accuracy improvement, showing that a 1-2 meter accuracy can be achieved from 1mresolution IKONOS Geo stereo images. The experiment indicated that...

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