Axes conventions: what are your needs?

[Martin Desruisseaux]

Hello all

I committed a first proposal for an AxesConvention enumeration [1]. This 
enumeration is not part of any OGC/ISO standard. It does not provide any 
new functionality, but tries to make some common patterns easier to use.

The vast majority of Geographic CRS defined in the EPSG database use the 
(latitude, longitude) axis order with longitudes in the [-180 … +180]° 
range. However many developers and existing softwares prefer the 
(longitude, latitude) axis order. This mismatch occurs so often that it 
is worth to provide a mechanism telling "use the CRS as defined in the 
EPSG database except that axis order shall be (longitude, latitude) 
rather than (latitude, longitude)". This is the purpose of the 
RIGHT_HANDED enumeration value.

An other common pattern is "use the CRS as defined in the EPSG database 
except that the range of longitude values shall be [0 … 360]° instead of 
[-180 … +180]°". This is the purpose of the POSITIVE_RANGE enumeration 
value.

Does anyone has other common patterns that we could add in the 
AxesConvention enumeration, or any comment on the currently proposed 
patterns?

Martin


[1] 
https://builds.apache.org/job/sis-jdk7/site/apidocs/org/apache/sis/referencing/cs/AxesConvention.html