FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM
The high-performance cloud-computing platform Google Earth Engine has been developed for global-scale analysis based on the Earth observation data. In particular, in this work, the geometric accuracy of the two most used nearly-global free DSMs (SRTM and ASTER) has been evaluated on the territorie...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2017-05-01
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| Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| Online Access: | http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-1-W1/627/2017/isprs-archives-XLII-1-W1-627-2017.pdf |
| _version_ | 1818893975631691776 |
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| author | A. Nascetti M. Di Rita R. Ravanelli M. Amicuzi S. Esposito M. Crespi |
| author_facet | A. Nascetti M. Di Rita R. Ravanelli M. Amicuzi S. Esposito M. Crespi |
| author_sort | A. Nascetti |
| collection | DOAJ |
| description | The high-performance cloud-computing platform Google Earth Engine has been developed for global-scale analysis based on the Earth
observation data. In particular, in this work, the geometric accuracy of the two most used nearly-global free DSMs (SRTM and ASTER)
has been evaluated on the territories of four American States (Colorado, Michigan, Nevada, Utah) and one Italian Region (Trentino Alto-
Adige, Northern Italy) exploiting the potentiality of this platform. These are large areas characterized by different terrain morphology,
land covers and slopes. The assessment has been performed using two different reference DSMs: the USGS National Elevation Dataset
(NED) and a LiDAR acquisition. The DSMs accuracy has been evaluated through computation of standard statistic parameters, both at
global scale (considering the whole State/Region) and in function of the terrain morphology using several slope classes. The geometric
accuracy in terms of Standard deviation and NMAD, for SRTM range from 2-3 meters in the first slope class to about 45 meters in the
last one, whereas for ASTER, the values range from 5-6 to 30 meters.<br><br>
In general, the performed analysis shows a better accuracy for the SRTM in the flat areas whereas the ASTER GDEM is more reliable
in the steep areas, where the slopes increase. These preliminary results highlight the GEE potentialities to perform DSM assessment on
a global scale. |
| first_indexed | 2024-12-19T18:21:08Z |
| format | Article |
| id | doaj.art-5eec8374d1f94bf7808abea2fc2eea2f |
| institution | Directory Open Access Journal |
| issn | 1682-1750 2194-9034 |
| language | English |
| last_indexed | 2024-12-19T18:21:08Z |
| publishDate | 2017-05-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| spelling | doaj.art-5eec8374d1f94bf7808abea2fc2eea2f2022-12-21T20:10:58ZengCopernicus PublicationsThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences1682-17502194-90342017-05-01XLII-1-W162763310.5194/isprs-archives-XLII-1-W1-627-2017FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORMA. Nascetti0M. Di Rita1R. Ravanelli2M. Amicuzi3S. Esposito4M. Crespi5Geodesy and Geomatics Division, DICEA, University of Rome “La Sapienza”, ItalyGeodesy and Geomatics Division, DICEA, University of Rome “La Sapienza”, ItalyGeodesy and Geomatics Division, DICEA, University of Rome “La Sapienza”, ItalyGeodesy and Geomatics Division, DICEA, University of Rome “La Sapienza”, ItalyGeodesy and Geomatics Division, DICEA, University of Rome “La Sapienza”, ItalyGeodesy and Geomatics Division, DICEA, University of Rome “La Sapienza”, ItalyThe high-performance cloud-computing platform Google Earth Engine has been developed for global-scale analysis based on the Earth observation data. In particular, in this work, the geometric accuracy of the two most used nearly-global free DSMs (SRTM and ASTER) has been evaluated on the territories of four American States (Colorado, Michigan, Nevada, Utah) and one Italian Region (Trentino Alto- Adige, Northern Italy) exploiting the potentiality of this platform. These are large areas characterized by different terrain morphology, land covers and slopes. The assessment has been performed using two different reference DSMs: the USGS National Elevation Dataset (NED) and a LiDAR acquisition. The DSMs accuracy has been evaluated through computation of standard statistic parameters, both at global scale (considering the whole State/Region) and in function of the terrain morphology using several slope classes. The geometric accuracy in terms of Standard deviation and NMAD, for SRTM range from 2-3 meters in the first slope class to about 45 meters in the last one, whereas for ASTER, the values range from 5-6 to 30 meters.<br><br> In general, the performed analysis shows a better accuracy for the SRTM in the flat areas whereas the ASTER GDEM is more reliable in the steep areas, where the slopes increase. These preliminary results highlight the GEE potentialities to perform DSM assessment on a global scale.http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-1-W1/627/2017/isprs-archives-XLII-1-W1-627-2017.pdf |
| spellingShingle | A. Nascetti M. Di Rita R. Ravanelli M. Amicuzi S. Esposito M. Crespi FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
| title | FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM |
| title_full | FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM |
| title_fullStr | FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM |
| title_full_unstemmed | FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM |
| title_short | FREE GLOBAL DSM ASSESSMENT ON LARGE SCALE AREAS EXPLOITING THE POTENTIALITIES OF THE INNOVATIVE GOOGLE EARTH ENGINE PLATFORM |
| title_sort | free global dsm assessment on large scale areas exploiting the potentialities of the innovative google earth engine platform |
| url | http://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XLII-1-W1/627/2017/isprs-archives-XLII-1-W1-627-2017.pdf |
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