Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Guosong Zhao Huaiping Xue Feng Ling |
| Copyright Year | 2010 |
| Description | Author affiliation: Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan, China (Guosong Zhao; Huaiping Xue; Feng Ling) |
| Abstract | Recently, a new Global Digital Elevation Model (GDEM) from optical stereo data acquired by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) was released with the resolution of 1 arc sec. In this study, the performance of the new ASTER GDEM is assessed by comparing with SRTM (the Shuttle Radar Topography Mission) and point data from ICESat/GLAS (Ice, Cloud, and land Elevation Satellite/ Geoscience Laser Altimeter System). A 5°×5° area (30°-35°N, 110°-115°E) with varied terrain was chosen as the study area. Standard DEM-to-DEM comparison, DEM-to-control-point comparison and visual analysis were used to evaluate the ASTER GDEM quality. The results show that the ASTER GDEM has much fewer voids than SRTM V2 (the version 2 SRTM). The ASTER GDEM has lower elevations (approximately −5m) compared with SRTM, whereas the ASTER GDEM has higher elevations (approximately 15m) compared with ICESat/GLAS points. To the vertical accuracy, the results of the ASTER GDEM compared with SRTM V4 (the version 4 SRTM), SRTM V2 and ICESat/GLAS points are 39.55m, 25.99m, 33.99m at 95% confidence respectively, exceeding 20m estimated prior to the ASTER GDEM production. The poor accuracy may be related to the high terrain relief and high ratio of lower stack number of the ASTER GDEM in the study area. The ASTER GDEM shows better performance in the flat areas than that in the mountainous areas, and the accuracy improves with the increasing stack number. The ASTER GDEM has many artifacts including inland water noises and straight lines related to the irregular stack number boundaries, which are caused by the methodology to produce the ASTER GDEM. |
| Starting Page | 1 |
| Ending Page | 5 |
| File Size | 3500355 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781424473014 |
| e-ISBN | 9781424473038 |
| DOI | 10.1109/GEOINFORMATICS.2010.5567970 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-18 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Accuracy Tiles Spaceborne radar ASTER Land surface ICESat Spatial resolution DEM Pixel Digital elevation models SRTM |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|