Comparison of the Karney Polygon Method and the Shoelace Method for Calculating Area

Vikky Aprelia Windarni; Adi Setiawan; Atina Rahmatalia

doi:10.30812/matrik.v23i1.2929

Vikky Aprelia Windarni Universitas AMIKOM, Yogyakarta, Indonesia
Adi Setiawan Universitas Kristen Satya Wacana, Salatiga, Indonesia
Atina Rahmatalia Universitas AMIKOM, Yogyakarta, Indonesia

DOI: https://doi.org/10.30812/matrik.v23i1.2929

Keywords: Google Earth, Karney Method, Latitude – Longtitude, Shoelace Method

Abstract

In calculating the area of an area, latitude and longitude coordinates are based on data from Global Administrative Region Database and Google Earth can be used. The aim of this research is to calculate the area. This research uses the Karney and Shoelace method to determine its accuracy based on Median Absolute Percentage Error in calculating the area of an area. Median Absolute Percentage Error results use data based on Global Administration The Regional Database by applying the polygon method proposed by Karney is 18.73%, and the percentage is 18.19% by applying the Shoelace method. Based on Google Earth data, implementation the method proposed by Karney obtained a percentage of 19.14%, and the application of shoelaces method obtained a percentage of 19.72%. In this case, Karney polygons and the Shoelace method has good accuracy because the value is below 20%. The proposed Shoelace method is easier to perform understand compared to the Karney method for calculating land area because it uses the Universal Transverse Mercator coordinate system, which projects points on the Earth's surface onto a flat plane.

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