They range from 2-digit, 10 km area grids to 6-digit, 100-metre-accurate positions on an unaided map. Using tools like the MicroDAGR GPS and Vector 21, you can go down to the metre with 10-digit grids, for those times you want to send a JDAM through a window. Most commonly, you will be giving the 6-digit figure.
The coordinates for any point on the map can now be expressed as an 8 digit number such as 09360215. The general expression in reference to reading these coordinates is RIGHT-UP. The first four numbers (read left to right) will locate the east-west position on a horizontal grid line. The last four numbers (read bottom to top) locate the north -Standards: Determine the six digit grid coordinates of the point identified on the map by: finding the coordinates of the grid square where the point is located and the 4 digit grid coordinates of the point, with or without a coordinate scale and protractor or plotting scale. Include the 100,000 meter square identifier with the grid coordinate.
Convert BNG to lat/long. Enter a British National Grid six or seven figure number for both easting and northing to return decimal latitude and longitude. For example, 429157, 623009 will return -1.54, 55.5 WGS84 (SRID 4326) Easting: Example 429157. Northing:
For example, an 8-digit UTM grid coordinate might look like this: 17TNE12345678. In this case, "17T" refers to the UTM zone (in this case, zone 17, which covers much of western North America), "NE" refers to a specific east-west grid cell within that zone, and "12345678" refers to a specific location within that grid cell. loXM7.