2
votes
1answer
406 views

Lambert93 to WGS84, IGN algorithms, longitude problem

I'm looking for a Java-based solution to convert coordinates from Lambert93 to WGS84. I found this, "lambert-java", which is an implementation of the algorithms (PDF) published by IGN (French ...
3
votes
1answer
660 views

WGS84 - how to convert

I have multiple locations saved in WGS84 - it looks like e.g. latitude: 12345678 longitude: 87654321. I tried to search it on the map this way: 12.345678 87.654321, but it doesn't match the place it ...
1
vote
3answers
2k views

How to convert Lat & Long from Onemap.sg to Google Maps

I have a set of address for Singapore, I would like to take the Lat & Long from onemap.sg (SYV21: X, Y / Easting, Northing) and then store it in my databse , convert into (WGS84: Longitude, ...
11
votes
2answers
5k views

How do you compute the earth's radius at a given geodetic latitude?

(I see there is an equation on wikipedia that does exactly what I am asking but there is no references. I have no way of confirming the validity of this equation!) I already understand the difference ...