Possible breaking changes needed for v1.0.0 about mocpy HOT 6 OPEN

Here is a list (to be completed if I forgot something) of the new features of v0.12.0

1. +, |, -, &, ~ operators redefinition for union, union, difference, intersect and complement respectively.

moc1 + moc2

and

moc1 - moc2

2. a rapid display of the mocs is now callable with

moc.display_preview()

3. WCS now finds automatically the center and size of the mocs for an automatic plot when the users don't provide these parameters

# example to write here

4. add MOC.barycenter and MOC.largest_distance_from_coo_to_vertices of a moc

from mocpy.

Since MOCPy has been partly developed on European projects (@bmatthieu3 ?) and relies on MOC Lib Rust which has also been partly developed on the ESCAPE European projects, (another one before @bmatthieu3 ?), we probably should add an Acknowledgements section.

For ESCAPE it would be (see MOC Lib Rust):

This work has been partly supported by the ESCAPE project.  
ESCAPE - The **E**uropean **S**cience **C**luster of **A**stronomy & **P**article Physics **E**SFRI Research Infrastructures -
has received funding from the **European Union’s Horizon 2020** research and innovation programme under **Grant Agreement no. 824064**. 

from mocpy.

Citations infos ?

from mocpy.

To be discussed:

• order of a moc is called depth, max_depth, max_order, order or max_norder (and there is also nside) depending of the method. This is nightmare-ish.

from mocpy.

My suggestion: stick to the vocabulary of the MOC standard (ie order). MOCLibRust has introduced depth which is used nowhere else to my knowledge.

from mocpy.

depth is a very common term in generic tree data structures, see e.g here, or this O'Mullane paper.
I introduced it when I was working on abstract quad-tree indexation schemes (possibly implemented by HTM, HEALPix, HEAZIP I thought I invented but that was already existing (I do not remember the original name: depht 0 cells are made of 3 depth 1 zones + an upper triangle, at depth 2 each zone is then defided into 4 sub-zones while the upper triangle is divided into 3 sub-zones + an upper triangle, and so on), ...).
But I agree that the common term in the HEALPix ecosystem is order probably since the NESTED indexation scheme is based on the Z-order curve.

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