Calculates the sheetnumber of TK25 maps from latitude and longitude.
tknr = get_tkblattnr(long, lat)
geographic longitude
[decimaldegreed]
geographic latitude [decimaldegree]
sheetnumber of the TK25, integer
This function calculates the relevant topographic map
(Topographische Karte TK25) number from given geographic coordinates
[decimaldegree]
.
The size of a TK25 map is defined as 10 geografic minutes in width and 6 geografic minutes in height.
(matrix aware)
No warranty, there are no input checks.