KAJIAN PEMBUATAN ACCURACY MASK CITRA DAN KORELASINYA DENGAN KONDISI TOPOGRAFI

Andri Suprayogi; Bandi Sasmito

doi:10.14710/elipsoida.2019.6441

DOI: https://doi.org/10.14710/elipsoida.2019.6441

KAJIAN PEMBUATAN ACCURACY MASK CITRA DAN KORELASINYA DENGAN KONDISI TOPOGRAFI

Andri Suprayogi¹ , Bandi Sasmito¹

¹Departemen Teknik Geodesi-Fakultas Teknik Universitas Diponegoro, Indonesia

²Departemen Teknik Geodesi-Fakultas Teknik Universitas Diponegoro

Received: 22 Nov 2019; Published: 22 Nov 2019.

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Abstract

Peta dasar dengan skala besar didapatkan salah satunya dengan penegakan kondisi geometrik citra satelit beresolusi tinggi untuk menghilangkan pergeseran pada hasil perekaman yang disebabkan oleh bervariasinya tinggi permukaan bumi. Representasi kualitas geometrik citra dengan nilai RMS bersifat keseluruhan sebagai rerata (means) dengan nilai akurasi masing-masing titik ICP. Representasi ini menunjukkan adanya kemungkinan perbedaan tingkat akurasi dari masing-masing piksel penyusun citra. Penelitian ini ditujukan untuk mengkaji pembuatan geometric accuracy mask dari citra yang dapat digunakan untuk memprediksi kualitas hasil-hasil digitasi dengan penentuan korelasi spasial antara layer kesalahan dengan kondisi topografi area studi sebagai sumber utama kesalahan pergeseran relief. Kesalahan ICP memiliki variasi yang berkisar antara 1.05 hingga 1,83 meter dimana hasil interpolasi IDW dari titik kesalahan menunjukkan nilai sebaran grid yang secara umum memiliki nilai antara titik-titik ICP. Nilai dari piksel yang berada di luar basis antar titik ICP diekstrapolasi dan dapat menunjukkan perubahan yang semakin besar, atau semakin kecil tergantung gradasi dari interpolasi antar titik. Diperoleh pula bahwa terdapat korelasi lokal yang lebih besar antara nilai kesalahan citra dengan nilai ketinggian dibanding terhadap nilai kelerengan.

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In Vol 2, No 02 (2019): Volume 02 Issue 02 Year 2019

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