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Simplify or filter (on history and or location) possible transformations

P√•l_Herman_Sund

I did a small test on a set of images close to Oslo/Norway.

Image CRS: WGS84/EGM96
Project CRS: ETRS1989 UTM Zone 32N/NN2000

When setting up the "Coordinate System Transformation" user is presented with a list of (not less than) 50+ possible transformation paths(!). The list includes

"abandoned" CRS's like CRS's based on NGO1948, European1950 etc
non-Norwegian CRS's like Swedish, Finnish and Estonian
and of course comboes of the above (for example abandoned Swedish RT90)

As EPSG database will continue to grow, an idea could be to implement a filter for possible CRS's hence transformation paths? Like a spatial filter and possibly a "historical" filter?

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Under Consideration

Status: Under Consideration

Comments

P√•l_Herman_Sund

Thanks @AnthonyMason for considering this idea.