Aufeis of the North-East of Russia: GIS catalogue for the Chukotka region
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2020
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| _version_ | 1867169142775218176 |
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| author | Makarieva, Olga Shikhov, Andrey Ostashov, Andrey Nesterova, Nataliia Semakina, Anastassiya |
| author_facet | Makarieva, Olga Shikhov, Andrey Ostashov, Andrey Nesterova, Nataliia Semakina, Anastassiya |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The GIS database contains the data of aufeis (naled) in the Chukotka region from historical and nowadays sources, and complete ArcGIS 10.1/10.2 and Qgis 3* projects to view and analyze the data. All data and projects have WGS 1984 coordinate system (without projection). ArcGIS and Qgis projects contain two layers, such as Aufeis_kadastr (historical aufeis data collection, point objects) and Aufeis_Landsat (satellite-derived aufeis data collection, polygon objects). Historical data collection is created based on the Cadastre of aufeis (naled) of the North-East of the USSR (1958). Each aufeis was digitized as point feature by the inventory map (scale 1:2 000 000), or by topographic maps. Attributive data was obtained from the Cadastre of aufeis. According to the historical data, there were 2024 aufeis with a total area 2976.9 km² within the studied area. Present-day aufeis dataset was created by Landsat-8 OLI images for the period 2013-2019. Each aufeis was delineated by satellite images as polygon. Cloud-free Landsat images are obtained immediately after snowmelt season, to detect the highest possible number of aufeis. Critical values of Normalized Difference Snow Index (NDSI) were used for semi-automated aufeis detection. However, a detailed expert-based verification was performed after automated procedure, to distinguish snow-covered areas from aufeis and cross-reference historical and satellite-based data collections. According to Landsat data, the number of aufeis reaches 2758, with their total area about 1147.1 km². The difference between the Cadastre (1958) and the satellite-derived data may indicate significant changes of aufeis formation environments. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_925440 |
| institution | PANGAEA |
| language | en |
| publishDate | 2020 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Aufeis of the North-East of Russia: GIS catalogue for the Chukotka region Makarieva, Olga Shikhov, Andrey Ostashov, Andrey Nesterova, Nataliia Semakina, Anastassiya aufeis; Chukitka; Chukotka_area; Historical Cadastre; Landsat; MULT; Multiple investigations; Penzhina_area; Russia The GIS database contains the data of aufeis (naled) in the Chukotka region from historical and nowadays sources, and complete ArcGIS 10.1/10.2 and Qgis 3* projects to view and analyze the data. All data and projects have WGS 1984 coordinate system (without projection). ArcGIS and Qgis projects contain two layers, such as Aufeis_kadastr (historical aufeis data collection, point objects) and Aufeis_Landsat (satellite-derived aufeis data collection, polygon objects). Historical data collection is created based on the Cadastre of aufeis (naled) of the North-East of the USSR (1958). Each aufeis was digitized as point feature by the inventory map (scale 1:2 000 000), or by topographic maps. Attributive data was obtained from the Cadastre of aufeis. According to the historical data, there were 2024 aufeis with a total area 2976.9 km² within the studied area. Present-day aufeis dataset was created by Landsat-8 OLI images for the period 2013-2019. Each aufeis was delineated by satellite images as polygon. Cloud-free Landsat images are obtained immediately after snowmelt season, to detect the highest possible number of aufeis. Critical values of Normalized Difference Snow Index (NDSI) were used for semi-automated aufeis detection. However, a detailed expert-based verification was performed after automated procedure, to distinguish snow-covered areas from aufeis and cross-reference historical and satellite-based data collections. According to Landsat data, the number of aufeis reaches 2758, with their total area about 1147.1 km². The difference between the Cadastre (1958) and the satellite-derived data may indicate significant changes of aufeis formation environments. |
| title | Aufeis of the North-East of Russia: GIS catalogue for the Chukotka region |
| topic | aufeis; Chukitka; Chukotka_area; Historical Cadastre; Landsat; MULT; Multiple investigations; Penzhina_area; Russia |
| url | https://doi.org/10.1594/PANGAEA.925440 |