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 ...

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...

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...

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...

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...

سپیدایی از ﭘﺎراﻣﺘﺮﻫﺎی ﻣﻮرد ﻧﻴﺎز در ﻣﻄﺎﻟﻌﺎت زﻳﺴﺖ‌ﻣﺤﻴﻄﻲ و آب‌و‌ﻫﻮاﻳﻲ به‌شمار می‌رود؛ ازاین‌رو، بررسی رفتار زمانی مکانی آن می‌تواند ابزاری برای شناخت تغییرات محیطی باشد. ﺳﻨﺠﻨﺪة مودیس ﺳﻄﺢ زﻣﻴﻦ را به‌طور ﻣﺴﺘﻤﺮ، ﻣﻘﻴﺎﺳﻲ ﺟﻬﺎﻧﻲ ﺑﺎ ﻗﺪرت ﺗﻔﻜﻴﻚ ﻣﻜﺎﻧﻲ مناسب ﺗﻮﻟﻴﺪ دسترس پژوهشگران ﻗﺮار داده است. این پژوهش، واکاوی موانع برداشت/ دیدبانی ایران‌زمین، نخست داده‌های روزانة سنجندة محدودة ایران، بازة 1/1/1379 تا 10/1...