Comparison of the elevation accuracies of different period topographic maps under various land cover types

Arif Oguz Altunel; Oytun Emre Sakıcı

Makale detayları

Comparison of the elevation accuracies of different period topographic maps under various land cover types

Yazarlar:

Arif Oguz Altunel | Oytun Emre Sakıcı

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Orman Ürünleri Transportu ve Ölçme Bilgisi

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.9 Issue 2, pp.22-32

Belge Tipi:

Makale

Yayın Tarihi:

1/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001298342

pISSN:

1309-856X

Anahtar kelimeler:

Özet:

 Depending upon the technological advancements, many differently scaled topographical maps were manufactured and put into service in Türkiye. In this particular study, the elevation values of 1:25.000 scaled topographic maps produced with analogue means in 1992-1993 period were compared to later produced, digital means integrated 2009-2010 period maps through precisely measured CORS-GPS ground control points over three different land cover types agriculture, partial-forest, and forest. 615, 3688 and 1739 systematic ground control points were respectively used inside, agriculture, partial forest and forest designated study sites. Comparisons were made over four different surface models produced from the same topographic maps: purpose-cut topographic sheets KS, entire topographic sheets TP, 10 m and 30 m resampled entire topographic sheets R10 and R30. The results showed that digitizing the map production means and techniques really improved the elevation accuracies of 1:25.000 scaled topographic maps. Elevation accuracies between analogue and digital means produced maps were distinct in agriculture-designated site however, they were not as easily identifiable in partial-forest and forest designated sites. Besides, it was obvious that a resampling algorithm applied to the raster surface models produced using these maps would certainly improve their elevation accuracies.

 Depending upon the technological advancements, many differently scaled topographical maps were manufactured and put into service in Türkiye. In this particular study, the elevation values of 1:25.000 scaled topographic maps produced with analogue means in 1992-1993 period were compared to later produced, digital means integrated 2009-2010 period maps through precisely measured CORS-GPS ground control points over three different land cover types agriculture, partial-forest, and forest. 615, 3688 and 1739 systematic ground control points were respectively used inside, agriculture, partial forest and forest designated study sites. Comparisons were made over four different surface models produced from the same topographic maps: purpose-cut topographic sheets KS, entire topographic sheets TP, 10 m and 30 m resampled entire topographic sheets R10 and R30. The results showed that digitizing the map production means and techniques really improved the elevation accuracies of 1:25.000 scaled topographic maps. Elevation accuracies between analogue and digital means produced maps were distinct in agriculture-designated site however, they were not as easily identifiable in partial-forest and forest designated sites. Besides, it was obvious that a resampling algorithm applied to the raster surface models produced using these maps would certainly improve their elevation accuracies.

 Depending upon the technological advancements, many differently scaled topographical maps were manufactured and put into service in Türkiye. In this particular study, the elevation values of 1:25.000 scaled topographic maps produced with analogue means in 1992-1993 period were compared to later produced, digital means integrated 2009-2010 period maps through precisely measured CORS-GPS ground control points over three different land cover types agriculture, partial-forest, and forest. 615, 3688 and 1739 systematic ground control points were respectively used inside, agriculture, partial forest and forest designated study sites. Comparisons were made over four different surface models produced from the same topographic maps: purpose-cut topographic sheets KS, entire topographic sheets TP, 10 m and 30 m resampled entire topographic sheets R10 and R30. The results showed that digitizing the map production means and techniques really improved the elevation accuracies of 1:25.000 scaled topographic maps. Elevation accuracies between analogue and digital means produced maps were distinct in agriculture-designated site however, they were not as easily identifiable in partial-forest and forest designated sites. Besides, it was obvious that a resampling algorithm applied to the raster surface models produced using these maps would certainly improve their elevation accuracies.

 Ülkemizde, teknolojik gelişmelere bağlı olarak 1950lerin sonlarından günümüze kadar farklı ölçeklerde birçok topografik harita üretilmiş ve hizmete sunulmuştur. Bu çalışmada, 1992-1993 yıllarında analog imkanlar çerçevesinde üretilmiş 1:25.000 ölçekli topografik haritalardan elde edilen yükseklik değerleri ile haritacılık sektöründeki teknolojik gelişmelere paralel olarak yakın geçmişte 2009-2010 dijital imkanlarla üretilen topografik haritalardan elde edilen yükseklik değerleri üç farklı arazi örtüsü tipi ziraat, parçalı orman ve orman üzerinden CORS-GPS kullanılarak elde edilmiş yersel referans verilerine ziraat formundaki çalışma sahasında 615 adet, parçalı orman formundaki sahada 3688 adet ve orman sahasında 1739 adet dayalı olarak karşılaştırılmıştır. Karşılaştırmalarda, raster verilerin doğrudan kullanıldığı iki yöntem Kesilmiş pafta KP ve Tam pafta TP yöntemleri ve yeniden örnekleme ile elde edilen raster verilerin kullanıldığı iki yöntem 10 m mekansal çözünürlükle yeniden örnekleme R10 ve 30 m mekansal çözünürlükle yeniden örnekleme R30 yöntemleri olmak üzere dört farklı raster yüzey modelinden elde edilen yükseklik değerlerinden yararlanılmıştır. Çalışma sonuçları, dijitalleşmenin topografik haritaların yükseklik hassasiyetleri üzerinde olumlu katkılar sağladığını göstermiştir. Analog ve dijital teknikle üretilen haritalar arasındaki yükseklik hassasiyetlerindeki farklılık ziraat arazi örtüsü tipinde oldukça belirgin iken, parçalı orman ve orman alanlarında dijitalleşme ile hassasiyet artışının daha düşük seviyelerde kaldığı belirlenmiştir. Ayrıca, raster veri üretiminde yeniden örnekleme yoluna gidilerek yükseklik değerleri tahmininde daha başarılı sonuçlar elde edilebileceği sonucuna ulaşılmıştır.

Makale detayları

Comparison of the elevation accuracies of different period topographic maps under various land cover types

Yazarlar:

Arif Oguz Altunel | Oytun Emre Sakıcı

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Orman Ürünleri Transportu ve Ölçme Bilgisi

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.9 Issue 2, pp.22-32

Belge Tipi:

Makale

Yayın Tarihi:

1/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001298342

pISSN:

1309-856X

Land cover/land use

map making

raster surface models

resamplingArazi örtüsü/kullanımı

Harita üretimi

Raster yüzey modeli

Yeniden örnekleme

Sayı

Makale detayları

Yazarlar: Arif Oguz Altunel | Oytun Emre Sakıcı

Yayıncı: Cankiri Karatekin University

Ana Başlıklar: Orman Ürünleri Transportu ve Ölçme Bilgisi

Dergi: Anadolu Orman Araştırmaları Dergisi Vol.9 Issue 2, pp.22-32

Belge Tipi: Makale

Yayın Tarihi: 1/2024

Belge Dili: Türkçe

Document ID (Org No.): 2001298342

pISSN: 1309-856X

Sayı

Yazarlar:

Arif Oguz Altunel | Oytun Emre Sakıcı

Yayıncı:

Cankiri Karatekin University

Ana Başlıklar:

Orman Ürünleri Transportu ve Ölçme Bilgisi

Dergi:

Anadolu Orman Araştırmaları Dergisi Vol.9 Issue 2, pp.22-32

Belge Tipi:

Makale

Yayın Tarihi:

1/2024

Belge Dili:

Türkçe

Document ID (Org No.):

2001298342

pISSN:

1309-856X