From 9e0148f844ab4d94542916d01ea5d4aac75cb28a Mon Sep 17 00:00:00 2001 From: Martin Dobias Date: Wed, 19 Feb 2020 23:00:52 +0100 Subject: Added more comments --- data/sql/grid_alternatives.sql | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'data/sql/grid_alternatives.sql') diff --git a/data/sql/grid_alternatives.sql b/data/sql/grid_alternatives.sql index 1c3f3f2e..1fbf61e3 100644 --- a/data/sql/grid_alternatives.sql +++ b/data/sql/grid_alternatives.sql @@ -2112,6 +2112,12 @@ INSERT INTO grid_alternatives(original_grid_name, NULL, NULL, NULL, NULL); -- Slovakia +-- +-- The definition of EPSG:8364 (JTSK03 to JTSK) uses NADCON method which is not supported by PROJ. +-- UGKK (Slovak Geodetic and Cartographic Institute) provides also NTv2 grid file in addition +-- to NADCON .las/.los files, so we define the NTv2 file here as an alternative. +-- The file is available at https://www.geoportal.sk/files/gz/slovakia_jtsk03_to_jtsk_ntv2.zip +-- but it does not have a confirmed license yet, so it is not available in proj-datumgrid-europe for now INSERT INTO grid_alternatives(original_grid_name, proj_grid_name, proj_grid_format, -- cgit v1.2.3