What is WorldBiG?
It is a grid system that allows for progressive (binary) sorting of the locations of objects and their features depending on their position in the field. Thanks to the use of binary grid densification algorithms, it is possible to quickly and accurately select the size of its squares. The maximum size of the grid has a side equal to 1024 km, and based on this size, the coding of squares is determined from 64 km, 32 km, 16 km, gradually down to 1/1024 of a kilometer. The purpose of the PolBiG binary grid proposed in the article, which is a special case of the generally defined WorldBiG grid, was the precise and simple determination of field areas in any arbitrarily set density of squares, a natural way of coding (labeling), ease of moving between reference systems (Earth-related and Cartesian), and finally, facilitated implementation of the grid in future practical applications that "differentiate" spatially.
- WorldBiG grids are characterized by the fact that the square of the side length of such a grid determines a surface area of that exact value in the field. The construction of the grid is based on the Lambert azimuthal equal-area projection.
- An 8×8 km binary grid designates fields with an area of 64 km2. A 1×1 km grid corresponds to exactly 1 km2 in the real world.
- WorldBiG grids can be densified indefinitely. The only limitations are GPS measurement precision and terrain topography (especially in mountainous areas).
- The grading of the binary grid densification is very small. During a single densification step, the side becomes half as large and the area decreases fourfold.
- The range of the WorldBiG binary grid is extensive. The central point of the grid can be chosen freely, limited only by its maximum dimensions. We only determine the choice between a constant radius R=6371 km in accordance with the PolBiG grid and Google Earth, or more accurately with a variable R, according to precise measurements of GIS programs (e.g., QGIS).
