نتایج جستجو برای: landsat imagery
تعداد نتایج: 55956 فیلتر نتایج به سال:
A nonlinear mean square estimation algorithm for cross-sensor image fusion and spectral anomaly detection is described. The algorithm can be used to enhance a low resolution image with a higher resolution coregistered multispectral image, and to detect anomalies between spectral bands (features in one spectral band that do not occur in other bands). Experimental results for Landsat data are pre...
Depletion curves of the areal extent of snow cover are shown to be basic information in a snowmelt-runoff model. Originally developed in European mountain basins, the procedure is now applied to simulate the runoff in the Rocky Mountains with the use of the Landsat imagery and air temperature data. The method requires a proper assessment of the recession coefficient of discharge in a given basi...
Image-to-Image Registration Quality Assessment of IKONOS/QuickBird Imagery Using Aerial Orthoimagery
An Image-to-Image registration assessment was conducted on IKONOS Precision Master imagery and QuickBird Standard imagery of Sioux Falls, South Dakota. Independent confirmation of vendor accuracy specifications is essential for instilling customer confidence in the product for potential applications. In our case, the application in mind is providing ground control and reference imagery for geom...
Spatial accuracy in the detection and monitoring of mountain pine beetle populations is an important aspect of both forest research and management. Using ground-collected data, classification models to predict mountain pine beetle-caused lodgepole pine mortality were developed for Landsat TM, ETM+, and IKONOS imagery. Our results suggest that low-resolution imagery such as Landsat TM (30 m) is ...
In Australia, remotely sensed Landsat data is routinely used for mapping and monitoring the change in extent of woody perennial vegetation. Time-series remotely sensed satellite imagery and ground information is used to form multi-temporal classifications of presence/absence of woody cover, typically for state-based management and reporting of clearing. More recently, there has been increased i...
BACKGROUND A simulation model that relies on satellite observations of vegetation cover from the Landsat 7 sensor and from the Moderate Resolution Imaging Spectroradiometer (MODIS) was used to estimate net primary productivity (NPP) of forest stands at the Bartlett Experiment Forest (BEF) in the White Mountains of New Hampshire. RESULTS Net primary production (NPP) predicted from the NASA-CAS...
Mapping and assessment of mangrove environment are crucial since the mangrove has an important role in the process of human-environment interaction. In Indonesia alone, 25% of South East Asia's mangroves available are under threat. Recognizing the availability and the ability of new sensor of Landsat data, this study investigates the use of Landsat ETM + 7 and Landsat 8, acquired in 2002 and 20...
In Australia, Landsat imagery is currently used in a number of regional and national monitoring projects to provide maps of the extent and change in area of perennial vegetation. They provide basic information for conservation, land management and for modelling carbon flux and water use. With the looming gap in Landsat data continuity it is timely to consider the issues involved in using data f...
Field size distributions and their changes have not been studied over large areas as field size change datasets are not available. This study quantifies agricultural field size changes in a consistent manner using Landsat satellite data that also provide geographic context for the observed decadal scale changes. Growing season cloud-free Landsat 30 m resolution images acquired from 9 to 25 year...
Remote sensing provides a useful tool for mapping invasive species across large areas. This study compared the effectiveness of imagery derived from three multi-spectral (Landsat Thematic Mapper (TM), SPOT 5, and Quickbird) and hyperspectral (Hyperion) imaging platforms for detection of the invasive species Lantana camara L. in eastern Australia. Landsat TM multispectral (MS) image provided an ...
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