VISUALISASI PETA KONTUR DALAM SUDUT PANDANG TIGA DIMENSI
DOI:
https://doi.org/10.9744/informatika.7.2.pp.%2077-84Keywords:
contour map, earth's coordinate, convert, mesh polygon, three dimensions.Abstract
A Contour map is commonly displayed in two dimensional view, where the earth's contours captured from above the earth. A Two dimensional contour map often difficult to express the earth's surface velocity. The problem arose when trying to visualize a contour map in three dimension environment, is about how to connect each contour lines that exist within the two dimensional contour map. In order to solve that problem, writer creates an algorithm that able to convert earth's coordinate data into a collection of polygonal mesh data. Conversion process is done by using a square polygon web. At the beginning, the square polygon web was set flat at the height of 0 meter. Then, every vertex on the square polygon web must be altered to the same height as the height of the contour map at the same coordinate. Experiments conducted shows that the square polygon web, which the height has been altered, able to display earth's contours in three-dimensional view. Abstract in Bahasa Indonesia : Pada umumnya peta kontur disajikan dalam sudut pandang dua dimensi, dimana kontur dilihat dari atas permukaan bumi. Penyajian peta kontur secara dua dimensi sering kali sulit memberikan gambaran mengenai ketinggian dari permukaan bumi yang sedang diamati. Permasalahan yang muncul ketika akan melakukan visualisasi peta kontur secara tiga dimensi adalah bagaimana cara menghubungkan garis kontur yang satu dengan yang lain. Permasalahan tersebut muncul karena sering kali data peta kontur yang didapat hanya berupa data koordinat bumi dari tiap kontur yang ada. Untuk memecahkan permasalahan tersebut, penulis membuat sebuah algoritma yang dapat meng-konversi kumpulan data koordinat bumi menjadi kumpulan data koordinat mesh polygon yang merupakan komponen penyusun objek tiga dimensi. Pembentukan data koordinat mesh polygon dilakukan dengan memanfaatkan sebuah jaringan poligon bujur sangkar yang menutupi seluruh daerah peta kontur. Pertama-tama, jaringan poligon bujur sangkar diletakkan mendatar pada ketinggian 0 meter. Kemudian tiap vertex pada jaringan poligon bujur sangkar akan diubah ketinggiannya sesuai dengan ketinggian peta kontur pada koordinat sumbu X dan Y yang sama dengan koordinat X dan Y vertex. Hasil pengujian menunjukkan bahwa jaringan poligon, yang ketinggian tiap vertexnya telah disesuaikan dengan ketinggian peta kontur, dapat menggambarkan kontur permukaan bumi secara tiga dimensi. Kata kunci: peta kontur, koordinat bumi, konversi, mesh polygon, tiga dimensi.Downloads
Published
2007-02-01
How to Cite
Jimmy, J. (2007). VISUALISASI PETA KONTUR DALAM SUDUT PANDANG TIGA DIMENSI. Jurnal Informatika, 7(2), pp. 77–84. https://doi.org/10.9744/informatika.7.2.pp. 77-84
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