The Maidenhead locator system allows expressing a latitude and longitude as a compact series of letters and numbers, and was adopted in 1980. A Maidenhead locator is typically expressed as two or three groups of two characters each; if higher precision is required, four groups of two characters each can be used. Groups alternate between letters and numbers; for example BL (field), BL11 (square), BL11BH (subsquare), or BL11BH16 (extended square).

6 questions
Filter by
Sorted by
Tagged with
2k views

### Is there a public standard for 8 and 10 character grid locators?

We have a question about the algorithm for conversion from coordinates into grid squares here, and this is an extension of that. I've noticed that there are several web-sites (for example here, or ...
• 2,873
1 vote
815 views

### Lat/Long to Maidenhead Locator in PHP

Looking for some PHP code to convert decimal lat and long to maidenhead locator/grid square. I saw one answer on here for the match, but I think there was an error in it so I can't trust it. I am ...
1 vote
90 views

### Mobile Phone offline maindenhead or mgrs web app [closed]

I read an article in a magazine or online about a (.gov, I think) site which showed two, four to six character sequences in a mobile phone browser window. The letters from left to right indicated ...
• 111
2k views

### How can one convert from Grid Square to Lat/Long?

Can someone explain how can get the Lat/Lon of a given Grid square? (the middle of the grid would be the best). I've looked at this (that does the "reverse"...from lat/lo to grid"): How can one ...
3k views

### Convert maidenhead grid square to lat/long in Excel?

I have a list of maidenhead grid squares in an Excel sheet that I want to convert to latitude and longitude. I want to keep it as simple as possible. Does anyone know of a formula to convert from ...
• 41