up until now we have been using EPSG:25832 (UTM Zone 32N) as our standard Coordinate system. Recently however after we aquired a new project area and consequently new software, I have to display data with EPSG:32632. Looking at the definitions, it seems the only difference is between the extents and the Datum. EPSG:25832 is based on the "European_Terrestrial_Reference_System_1989" using the spheroid "GRS 1980" and EPSG:32632 uses the datum "WGS_1984" with the spheroid of the same name – This means the Semi-major axis are the same but the Semi-minor axis has a difference of 2 meters. All other parameters are the same.
So now the question….can I use them interchangeably on a regional scale? meaning I will not be using them to control satellite systems or aircraft flight paths.
Best Answer
The EPSG registry describes the two CRS as very similar and in some areas interchangeable. In "Area of use" section:
EPSG: 32632. Between 6 ° E and 12 ° E, northern hemisphere between equator and 84 ° N, onshore and offshore. Algeria. Austria. Cameroon. Denmark. Equatorial Guinea. France. Gabon. Germany. Italy. Libya. Liechtenstein. Monaco. Netherlands. Niger. Nigeria. Norway. Sao Tome and Principe. Svalbard. Sweden. Switzerland. Tunisia. Vatican City State.
EPSG: 25832. Europe between 6 ° E and 12 ° E: Austria; Belgium; Denmark - onshore and offshore; Germany - onshore and offshore; Including Norway - onshore and offshore; Spain - offshore.
So, with regard to Europe, I'd use both systems for regional maps of Austria, Denmark, Germany or Spain; while for parts of Europe such as Italy or Switzerland I'd recommend the EPSG:32632.
For all other non-European areas I'd use always the 32632.