Calculation with WorldBiG grid density selection (side square from 64 km to 1/1024 km)
The *.xlsx file contains columns: Group, Latitude, Longitude and possibly Value (absence [Group] recalculates the area itself).
When the loaded file contains a Value column, then WorldBiG always uses its data for calculations:
Enter the latitude and longitude (in degrees) of the nearest point for the area under study.
This point will be the central point of the grid with a maximum span of 1024 × 1024 km.
Latitude:
Longitude :
The programme will generate a grid best suited locally to the Earth's surface for a variable R-radius.
If you do not select the variable R, the average for the Earth is R=6371 km (slightly inaccurate, but according to Google Earth calculations).
Variable R-radius
Side of the square
64 km
32 km
16 km
8 km
4 km
2 km
1 km
1/2 km
1/4 km
1/8 km
1/16 km
1/32 km
1/64 km
1/128 km
1/256 km
1/512 km
1/1024 km