Abstract
This paper proposes a novel algorithm for converting XYZ Tiles (Slippy Maps) to World Grid Square tile for a given Z value by merging several XYZ Tiles and cutting them into several pieces of World Grid Square tiles. We propose a framework to analyze XYZ Tiles with World Grid Square statistics beyond different scientific disciplines. In other words, we can perform statistical analysis on cartographic images. This paper describes the conversion of XYZ-based map tiles into World Grid Square tiles. We will examine the size of the actual World Grid Square area and the World Grid Square tile made from XYZ Tiles. As an example of analysis, we calculate the number of people affected by the tsunami by combining Grid Square statistics created from the XYZ Tiles published using the Web API with existing Grid Square statistics. Finally, as a case study, we will calculate the number of people affected by the tsunami by combining the World Grid Square tile converted from the XYZ Tiles published using the API with existing World Grid Square statistics.