Automatic extraction of shorelines from Landsat TM and ETM+ multi-temporal images with subpixel precision

Urban Built-Up Area Extraction from Landsat TM/ETM+ Images Using Spectral Information and Multivariate Texture

Urban built-up area information is required by various applications. However, urban built-up area extraction using moderate resolution satellite data, such as Landsat series data, is still a challenging task due to significant intra-urban heterogeneity and spectral confusion with other land cover types. In this paper, a new method that combines spectral information and multivariate texture is p...

Extraction of Watersheds from Dtm and Images with Subpixel Precision

An approach to extract watersheds and watercourses, as well as their corresponding valleys and hills, from grid DTMs and digital images with subpixel accuracy is proposed. The critical points of the terrain, which are essential as the starting points for the construction of these separatrices, are extracted efficiently with subpixel accuracy by a linear-filter-based approach. The separatrices a...

Seasonal Composite Landsat TM/ETM+ Images Using the Medoid (a Multi-Dimensional Median)

Multi-temporal satellite imagery can be composited over a season (or other time period) to produce imagery which is representative of that period, using techniques which will reduce contamination by cloud and other problems. For the purposes of vegetation monitoring, a commonly used technique is the Maximum NDVI Composite, used in conjunction with variety of other constraints. The current paper...

Complementarity of ResourceSat-1 AWiFS and Landsat TM/ETM+ sensors

Block Adjustement of Landsat-7 Etm Images

This research study shows the potential of large image-block adjustment with nadir viewing sensor images. The method uses the geometric correction system developed for multi-source images at the Canada Centre for Remote Sensing. The results with 15 Landsat-7 ETM images show that the same accuracy can be obtained with a large image block than with a single image using the same number of ground c...