[OSRS-PROJ] Prime Meridian Support in PROJ.4
gerald.evenden at verizon.net
Thu Oct 3 21:36:53 EDT 2002
Frank Warmerdam wrote:
> Gerald Evenden wrote:
> > Just as an aside from the original author of proj.4: prime meridian has no place
> > in proj.4. Any offsets in longitude due to variations in coordinate system "prime
> > meridian" should be taken care of externally with adjustments to "lon_0"
> > parameter.
> > I know my advice will be ignored but I could not resist expressing my displeasure
> > with the inclusion of PM code within the proj.4 library. PMS, if you will.
Sorry, but I could not resist "Prime Meridian Syndrome." :-)
> Well, the corruption started when I introduced support for converting
> between different datums. At that point I was trying to make PROJ.4 into
> a coordinate system conversion library rather than just a projections
> library. I can see why you feel that is a perversion of the original vision
> of PROJ.4, and the focus of it's role, but that is the danger of open source.
> Your work can be adopted an taken in directions you never intended.
> That said, I think PROJ.4 is serving an important function for lots of other
> projects by taking on the larger role of coordinate systems conversion and
> that integrating that task in one library rather than two layered libraries
> has some benefits.
> Your advice isn't exactly disregarded ... your vision messages cause me lots of
> angst! It just that user demand (and my own needs) has led me to take PROJ.4
> in a different direction than originally intended. Obviously we all owe you
> alot as you did all the hard work ... the stuff that I am far from competent
> to do. But in the end, I will still pursue the features I think are useful
> and needed,
I generally remain silent on changes to proj.4 and try to limit comments to
places where I feel things are going a little too astray. But in all cases, please
take the comments as friendly suggestions. I consider the version of proj.4
you and your group is distributing yours and these suggestions are only to remind
you that I'm still looking over your shoulders.
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