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2021-07-22GeoTIFF grid reading: perf improvements (fixes #2785)Even Rouault
With this commit, and the 2 previous ones, given mytest.cpp ``` int main() { PJ* pj = proj_create(nullptr, "+proj=vgridshift +grids=us_nga_egm96_15.tif"); for( int i = 0; i < 5*1000*1000; i++) { PJ_COORD coord; coord.lpz.lam = 0; coord.lpz.phi = 0; coord.lpz.z = 0; proj_trans(pj, PJ_FWD, coord); } return 0; } ``` we get a x2 speedup Before: ``` $ PROJ_LIB=data:$HOME/proj/PROJ-data/us_nga LD_LIBRARY_PATH=src/.libs hyperfine --warmup 1 'taskset -c 11 ./mytest' Benchmark #1: taskset -c 11 ./mytest Time (mean ± σ): 1.950 s ± 0.014 s [User: 1.945 s, System: 0.005 s] Range (min … max): 1.937 s … 1.971 s ``` After: ``` $ PROJ_LIB=data:$HOME/proj/PROJ-data/us_nga LD_LIBRARY_PATH=src/.libs hyperfine --warmup 1 'taskset -c 11 ./mytest' Benchmark #1: taskset -c 11 ./mytest Time (mean ± σ): 984.4 ms ± 3.1 ms [User: 977.0 ms, System: 7.2 ms] Range (min … max): 979.3 ms … 990.5 ms ```
2020-05-09scripts/fix_typos.sh: fix URLs to dictionaries, and fix typos spottedEven Rouault
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