Assessment of shuttle radar topography mission elevation data based on torographic maps in Turkey

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Küçük Resim

Tarih

2009

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

Depending on scale, topographic maps depicting the shape of the land surfaces of the Earth are produced from different data sources. National topographic maps at a scale of 1:25 000 (25K maps) produced by General Command of Mapping are used as the base map set in Turkey. This map set, which consists of approximately 5500 sheets, covers the whole country and is produced using photogrammetric methods. Digital Elevation Models (DEMs) created from these maps are also available. Recently, another data source, Synthetic Aperture Radar (SAR) interferometric data, has become more important than those produced by conventional methods. The Shuttle Radar Topography Mission (SRTM) contains elevation data with 3 arc-second resolution and 16 m absolute height error (90 percent confidence level). These data are freely available via the Internet for approximately 80 percent of the Earth's land mass. In this study, SRTM DEM was compared with DEM derived from 25K topographic maps for different parts of Turkey. The study areas, each covering four neighboring 25K maps, and having an area of approximately 600 km2, were chosen to represent various terrain characteristics. For the comparison, DEMs created from the 25K maps were obtained and organized as files for each map sheet in vector format, containing the digitized contour lines. From these data, DEMs in the resolution of 3 arc-second were created (25K-DEM), in the same structure as the SRTM DEM, allowing the 25K-DEMs and the SRTM DEM to be compared directly. The results show that the agreement of SRTM DEM to the 25K-DEM is within about 13 m, which is less than the SRTM's targeted error of 16 m. The spatial distribution of the height differences between SRTM-DEM and the 25K-DEM and correlation analysis show that the differences were mainly related to the topography of the test areas. In some areas, local height shifts were determined.

Açıklama

Anahtar Kelimeler

Accuracy assessment, Digital elevation model, Interferometric synthetic aperture radar, SRTM, Topographic maps, Topography, Dijital yükseltme modeli, İnterferometrik sentetik açıklıklı radar, Topografik haritalar, Topografya, Doğruluk değerlendirmesi

Kaynak

Cartography and Geographic Information Science

WoS Q Değeri

Scopus Q Değeri

Q1

Cilt

36

Sayı

1

Künye

Bildirici, İ. Ö., Üstün, A., Selvi, H. Z., Abbak, R. A., Buğdaycı, İ. (2009). Assessment of shuttle radar topography mission elevation data based on torographic maps in Turkey. Cartography and Geographic Information Science, 36(1), 95-104.