Investigation of Terrain Elevation Estimation of GEDI Spaceborne Laser Altimeter

Ömer Gökberk Narin; Mustafa Yilmaz

Article Details

Investigation of Terrain Elevation Estimation of GEDI Spaceborne Laser Altimeter

Authors:

Ömer Gökberk Narin | Mustafa Yilmaz

Publisher:

Afyon Kocatepe University

Main Topics:

Fotogrametri ve Uzaktan Algılama

Journal:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.24 Issue 1, pp.85-89

Document Type:

Article

Publication Date:

2/2024

Document Language:

Turkish

Document ID (Org No.):

2001312350

pISSN:

2149-3367

Keywords:

Abstract:

 Global Ecosystem Dynamics Investigate GEDI is a space-based laser altimeter system used for Earth observation in many areas such as forest cover, water level and land elevation estimation. GEDI data is affected by atmospheric effects due to the sensor used during the observation. In our study, 55 control points within GEDI points were compared in the borders of Afyonkarahisar province located in the west of Turkey. In addition, a comparison was made according to solar_elevation and slope in order to examine the sensitivity of GEDI data in more detail. Root Mean Squared Error RMSE was used as the accuracy metric for comparison. As a result, it was observed that the accuracy of GEDI data increased at night and in areas with low slope. In our study, GEDI data showed a success of 2.79 m in determining the height of the land for 55 points, and 2.34 m at 30 points with low slope at night, according to RMSE.

 Global Ecosystem Dynamics Investigate GEDI is a space-based laser altimeter system used for Earth observation in many areas such as forest cover, water level and land elevation estimation. GEDI data is affected by atmospheric effects due to the sensor used during the observation. In our study, 55 control points within GEDI points were compared in the borders of Afyonkarahisar province located in the west of Turkey. In addition, a comparison was made according to solar_elevation and slope in order to examine the sensitivity of GEDI data in more detail. Root Mean Squared Error RMSE was used as the accuracy metric for comparison. As a result, it was observed that the accuracy of GEDI data increased at night and in areas with low slope. In our study, GEDI data showed a success of 2.79 m in determining the height of the land for 55 points, and 2.34 m at 30 points with low slope at night, according to RMSE.

 Global Ecosystem Dynamics Investigate GEDI is a space-based laser altimeter system used for Earth observation in many areas such as forest cover, water level and land elevation estimation. GEDI data is affected by atmospheric effects due to the sensor used during the observation. In our study, 55 control points within GEDI points were compared in the borders of Afyonkarahisar province located in the west of Turkey. In addition, a comparison was made according to solar_elevation and slope in order to examine the sensitivity of GEDI data in more detail. Root Mean Squared Error RMSE was used as the accuracy metric for comparison. As a result, it was observed that the accuracy of GEDI data increased at night and in areas with low slope. In our study, GEDI data showed a success of 2.79 m in determining the height of the land for 55 points, and 2.34 m at 30 points with low slope at night, according to RMSE.

 Global Ecosystem Dynamics Investigate GEDI, orman örtüsü, su seviyesi ve arazi yüksekliği tahmini gibi birçok alanda yeryüzünün gözlemlenmesi için kullanılan uzay kaynaklı bir lazer altimetre sistemidir. GEDI verileri, gözlem sırasında kullanılan sensör nedeniyle atmosferik etkilerden etkilenmektedir. Çalışmamızda Türkiyenin batısında yer alan Afyonkarahisar ili sınırları içerisindeki 55 kontrol noktası ile GEDI noktası karşılaştırmıştır. Ayrıca çalışmada GEDI verisinin hassasiyetinin daha detaylı incelenmesi için solar_elevation ve eğime göre karşılaştırma yapılmıştır. Karşılaştırma için doğruluk metriği olarak Karesel Ortalama Hata KOH kullanılmıştır. Sonuç olarak GEDI verisinin gece zamanlarında ve eğimin düşük olduğu alanlarda doğruluğunun arttığı görülmüştür. Çalışmamızda 55 nokta için arazi yüksekliği belirlemede GEDI verisi KOHa göre 2.79 m, gece ve düşük eğimli 30 noktada ise 2.34 m başarı göstermiştir.

Article Details

Investigation of Terrain Elevation Estimation of GEDI Spaceborne Laser Altimeter

Authors:

Ömer Gökberk Narin | Mustafa Yilmaz

Publisher:

Afyon Kocatepe University

Main Topics:

Fotogrametri ve Uzaktan Algılama

Journal:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.24 Issue 1, pp.85-89

Document Type:

Article

Publication Date:

2/2024

Document Language:

Turkish

Document ID (Org No.):

2001312350

pISSN:

2149-3367

GEDI

GNSS

Terrain height

Satellite AltimetryUydu Altimetresi

GEDI

Arazi yüksekliği

GNSS

Issues

Article Details

Authors: Ömer Gökberk Narin | Mustafa Yilmaz

Publisher: Afyon Kocatepe University

Main Topics: Fotogrametri ve Uzaktan Algılama

Journal: Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.24 Issue 1, pp.85-89

Document Type: Article

Publication Date: 2/2024

Document Language: Turkish

Document ID (Org No.): 2001312350

pISSN: 2149-3367

Issues

Authors:

Ömer Gökberk Narin | Mustafa Yilmaz

Publisher:

Afyon Kocatepe University

Main Topics:

Fotogrametri ve Uzaktan Algılama

Journal:

Afyon Kocatepe Üniversitesi Fen Ve Mühendislik Bilimleri Dergisi Vol.24 Issue 1, pp.85-89

Document Type:

Article

Publication Date:

2/2024

Document Language:

Turkish

Document ID (Org No.):

2001312350

pISSN:

2149-3367