Regards all

Quick question. Please could someone confirm where on a runway do the published latitude and longitude coordinates refer to, eg, where on EGSS runway 040 are the points, 51.87505 and 0.219836 ?

I'm thinking the centre of the threshold point, but I've struggled to find this confirmed.

Regards

It will be at the point that marks the intersection of the runway centerline with the threshold. In the case of EGSS runway 04, which has a displaced threshold, it is the point where the runway surface begins, not the landing threshold.

If you have coordinates in decimal degress as you show above, you can type them into the search window of Google Maps, with latitude first, then a comma, then longitude - i.e. 5187505, 0.219836 - keeping in mind that south latitudes and west longitudes are negative. 

1 hour ago, JRBarrett said:

It will be at the point that marks the intersection of the runway centerline with the threshold. In the case of EGSS runway 04, which has a displaced threshold, it is the point where the runway surface begins, not the landing threshold.

If you have coordinates in decimal degress as you show above, you can type them into the search window of Google Maps, with latitude first, then a comma, then longitude - i.e. 5187505, 0.219836 - keeping in mind that south latitudes and west longitudes are negative. 

Many thanks for the reply, Jim.

I didn't know that I could enter coordinates into Google maps ! I've also just found out that if I right click on the map, then select, "What's here ?", Google maps will display the exact coordinates. Tried it at EGSS, and sure enough, I can find a match for the above coordinates.

Everyday's a school day...

Regards

Gary