Category Archives: Gps
Gis On The Qinghai – Tibet Railway
Weary pilgrims, attending the Sunning of the Buddha Festival in the Chinese city of Xining (the capital of Qinghai Province), board the Qinghai-Tibet train for the 26-hour trip home to Lhasa, capital of Tibet Province.Whilst asleep, the train will be supervised by the railway’s control centre, which displays real-time information on the train’s location, speed, oxygen levels, and electrical system.The control centre is a partnership between Qinghai-Tibet Railway Bureau and the State Key Laboratory of Rail Traffic Control and Safety, at Beijing Jiaotong University. Together, they have developed a monitoring system for railway operation and safety for the Tibetan line.Close monitoring is critical as the train ascends from Xining (2,275 metre) to cross a remote Himalayan plateau at 4000 metre altitude, before reaching their destination 1900 kilometers away.When the railway section between Golumd (the second largest city of Qinghai province) and Lhasa opened in July, it set numerous worldwide engineering Read more…
Hyperspectral Data Processing and Applications
The availability of hyperspectral data has overcome the constraints and limitations of low spectral and spatial resolution imagery, and discreet spectral signatures. Hyperspectral images provide high spectral resolution data, with many narrow con¬tiguous spectral bands allowing for detailed applications.1. Target detection, 2. Material mapping, 3. Material identification, 4. Mapping details of surface propertiesIn these cases, the additional information provided by hyperspectral imagery often provides results not possible with multispectral or other types of imagery. In target detection projects, investigators are generally trying to locate known target materials. This can sometimes involve distinguishing targets from very similar backgrounds, or locating examples of targets that are smaller than the nominal pixel size. For example, hyperspectral imagery has been used by military personnel to detect military vehicles under partial vegetation canopy, and to detect small military objects within relatively larger pixels.The spectral characteristics of oil seeps and oil-impacted soils are generally too subtle Read more…
