Martin, Surprisingly, coordinate order is a tricky issue. Your description is well written.
George On Jan 10, 2014, at 5:06 AM, Martin Desruisseaux <[email protected]> wrote: > 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 > George Percivall [email protected] http://www.linkedin.com/in/gpercivall @Percivall on Twitter +1-301-560-6439 http://www.opengeospatial.org/ OGC -- Making Location Count
