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path: root/data/sql/conversion_triggers.sql
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2019-04-22Database: make conversion & helmert_transformation updatable viewsEven Rouault
- Transform conversion as a view, and when inserting into it, actually insert into 3 tables: conversion_table, conversion_method and conversion_param, so that method and parameter names are not repeated each time. - Similarly for helmert_tranformation, insert into helmert_transformation_tabl and coordinate_operation_method. This reduces the db size from 6 344 704 bytes to 5 853 184 bytes, without significant slowdown for queries.
2018-11-14Implement RFC 2: Initial integration of "GDAL SRS barn" workEven Rouault
This work mostly consists of: - a C++ implementation of the ISO-19111:2018 / OGC Topic 2 "Referencing by coordinates" classes to represent Datums, Coordinate systems, CRSs (Coordinate Reference Systems) and Coordinate Operations. - methods to convert between this C++ modeling and WKT1, WKT2 and PROJ string representations of those objects - management and query of a SQLite3 database of CRS and Coordinate Operation definition - a C API binding part of those capabilities This is all-in-one squashed commit of the work of https://github.com/OSGeo/proj.4/pull/1040