The large number of data sources on the Internet can be used to augment and verify the accuracy of geospatial sources, such as gazetteers and annotated satellite imagery. Data sources such as satellite imagery, maps, gazetteers and vector data have been traditionally used in geographic information systems (GIS), but nontraditional geospatial data, such as online phone books and property records...

Detection of urban objects in very high resolution (VHR) satellite imagery is challenging due to the similarities in the spectral and textural characteristics of urban land cover classes. Therefore, additional information such as elevation data is required for a proper classification. In this study, instead of LiDAR data, elevation information generated from satellite stereo images is used to a...

Panchromatic (PAN) satellite imagery has been used successfully in different applications such as topographic mapping and terrain modelling. Nevertheless, PAN imagery is still one of the less used digital sources for land-change studies except few processes where the high-resolution of the PAN images is used to improve the visualization quality of the multi-spectral images. This research aimed ...

The recent launch and operational deployment of the WorldView-2 satellite by DigitalGlobe has remote sensing experts around the world in a state of excitement. Not only does this advanced new satellite offer extremely high resolution imagery with 50cm pixels, but the 8 bands that it collects promise greater insight into classifying and mapping the world in which we live. Besides the visible col...

Imagery is the basic input element of the photogrammetric map production. For decades, aerial photography has been the dominant option to fulfill the imagery request of the photogrammetry and the other disciplines. Due to the significant development in the field of remote sensing spacecraft and the on-board sensors, space imagery has become a serious alternative to the aerial photography. High-...

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...

To date, prevention of natural disasters is only rarely achieved, and such events continue to pose an increasing threat to life and property. Especially following earthquakes, there is a need for rapid, accurate and reliable damage information in the critical postevent hours. Remote sensing technology can provide valuable information for response activities due to potentially high spatialtempor...

Natural hazards and land management issues can benefit nowadays from the increasing availability of free, high-resolution satellite imagery that opens the way to fine scale detailed investigations. In high elevation catchments the analysis of vegetation dynamics deserves particular attention since little climatic modifications can be amplified in such fragile systems. For the same reasons, the ...

Two remote sensing methods, satellite altimetry and 4D-Var assimilation of satellite imagery, are used to compute surface velocity fields in the Black Sea region. Surface currents derived from the two methods are compared for several cases with intense mesoscale and large-scale dynamics during low wind conditions. Comparison shows that the obtained results coincide well quantitatively and quali...