From 964569728722e9e91f152410a4747a0ba078bd84 Mon Sep 17 00:00:00 2001 From: Even Rouault Date: Tue, 14 Apr 2020 17:17:55 +0200 Subject: tmerc/utm: add a +algo=auto/evenden_snyder/poder_engsager parameter The default remains +alg=poder_engsager. This default value can be changed in proj.ini +algo=auto will use Evenden Synder implementation if the error in doing so remains below 0.1 mm on Earth-sized ellipsoid --- data/proj.ini | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'data') diff --git a/data/proj.ini b/data/proj.ini index c9e29e52..067f0170 100644 --- a/data/proj.ini +++ b/data/proj.ini @@ -14,3 +14,11 @@ cache_enabled = on cache_size_MB = 300 cache_ttl_sec = 86400 + +; Transverse Mercator (and UTM) default algorithm: auto, evenden_snyder or poder_engsager +; * evenden_snyder is the fastest, but less accurate far from central meridian +; * poder_engsager is slower, but more accurate far from central meridian +; * default will auto-select between the two above depending on the coordinate +; to transform and will use evenden_snyder if the error in doing so is below +; 0.1 mm (for an ellipsoid of the size of Earth) +tmerc_default_algo = poder_engsager -- cgit v1.2.3