SW Nepal Address is an experimental addressing system for Nepal which provides an encoded address using latitude and longitude. It is not a new concept but tried to put it in simple way so that it can be communicated easily. Example. 20. 33947. 69263 np = 85. 33947e, 27. 69263n. 20 - Is the grid zone number. Each grid of 1 x 1 degree is assigned a number. Nepal has 28 zones.