[Proj] New release of libproj4
Clifford J Mugnier
cjmce at lsu.edu
Sat Feb 5 12:23:26 EST 2005
Round-trip precision of 0.1 mm is considered standard for geodetic
transformations. (X,Y -> Lat,Long -> X,Y)
19th Century precision was considered standard (at the time) at 0.1 meters.
That's why a lot of old projection equations need an iterative loop for the
Release 050204 is now available on:
About 10 new projections. Also added a list of modification dates
of individual modules (from ident) to the web page.
As an aside: I looked into adding a "configure" setup but was completely
overwhelmed by its complexity. After spending about 8 hours pouring
documentation that pales the most complex programming language I finally
gave up. Nice idea but far beyond the capabilities of this frumpy,
PS2: recent events caused me to check the performance of the "sterea"
projection on CA maritime province usage. PEI appears to work OK except
for a 1-2mm error on a few test points. Not sure of the pedigree of
points so I do not know who or what to blame. This brings up another
what precision is necessary for geodesic, cadastral and other projection
Jerry and the low riders: Daisy Mae and Joshua.
"The whole religious complexion of the modern world is due to the
absence from Jerusalem of a lunatic asylum." Havelock Ellis, 1914
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