Please note that rgdal will be retired by the end of 2023, plan transition to sf/stars/terra functions using GDAL and PROJ at your earliest convenience.

Version 1.5-31 (development, rev. 1172-)

• unescape underscores in help pages

Version 1.5-30 (development, rev. 1166-1171)

• restore PROJ path assignment for PROJ >= 6 not using PROJ_LIB (was used for PROJ 6 but not > 6) https://github.com/rsbivand/rgrass/issues/52

• Update src/Makevars.win to GDAL 3.4.1 for R < 4.2 https://github.com/r-spatial/sf/pull/1919

Version 1.5-29 (2022-03-15, rev. 1159-1165)

• also convert BOUNDCRS to PROJCRS by default in OGRSpatialRef() and getProjectionRef()

• test for chunks table in cache.db in vignette

• quietening tests only differing by proj.db version.

Version 1.5-28 (2021-12-15, rev. 1157-1158)

• Adapting to R 4.2 Windows UCRT

Version 1.5-27 (2021-09-16, rev. 1149-1156)

• Correcting logic error in check for MXE UCRT builds (temporary)

Version 1.5-26 (2021-09-15, rev. 1141-1148)

• Mute use of PROJ CDN for MXE UCRT builds (temporary)

• Run autoupdate on configure.ac to handle obsolete AC_HELP_STRING etc.

Version 1.5-25 (2021-09-08, rev. 1122-1140)

• Add environment variable access to –with-data-copy by PROJ_GDAL_DATA_COPY (https://github.com/r-spatial/sf/issues/1605)

• Adaptations for PROJ 8.

• Handle mixed 2D/3D in readOGR(): (https://github.com/r-spatial/sf/issues/1683)

• Add tweak for UCRT builds.

• Thin examples for spTransform().

Version 1.5-23 (2021-02-03, rev. 1120-1121)

• Further fallout after removing valgrind issues.

Version 1.5-22 (2021-02-02, rev. 1106-1119)

• Attempt to remove further valgrind leak in proj6.cpp: PROJcopyEPSG() and in ogr_proj.cpp, both wrongly placed object destructors.

• Modified roundtripping all declared projections in ?project examples because some listed projections for PROJ >= 5 provoke valgrind leakages by returning very large out-of-scope values for input coordinates (0, 0); inversion of these is not attempted; some listed projections are not projections.

Version 1.5-21 (2021-01-27, rev. 1093-1105)

• Suggest rgeos to write pre-SFS multipolygon objects to avoid unpleasant workaround.

• Try to eliminate current valgrind leaks, starting from (https://github.com/r-spatial/gstat/issues/82).

• Try to increase robustness to installation with early PROJ 6 versions, which often lack functionality found necessary later (for example visualization order); the code had assumed that this function always was available and behaved as it now does. There are now graceful failures when not available.

Version 1.5-19 (2021-01-05, rev. 1083-1092)

• Dan Baston: raster speedups

• PROJ 7.2.1 includes a bug-fix for +proj=ob_tran cases that required changes in detection and handling of target/source CRS reversal, https://lists.osgeo.org/pipermail/proj/2020-December/009999.html

Version 1.5-18 (2020-10-13, rev. 1071-1082)

• condition tests/test_enforce_xy.R on PROJ >= 6 and GDAL >= 3 (email BDR, I forgot to re-check with PROJ-5.2.0/GDAL-2.2.4).

• Adaptation to EPSG 10 database format started (from PROJ 7.2); choose DB columns by name not number in vignette.

Version 1.5-17 (2020-10-08, rev. 1051-1070)

• "CRS" instantiation now prefers PROJ: use rgdal::set_prefer_proj(FALSE) to return to earlier behaviour. It seems that access from C/C++ code to mechanisms in PROJ offers more depth than going through GDAL to PROJ. This "CRS" instantiation in sp and raster; Proj4 and WKT2 strings may differ depending on whether instantiation is straight from PROJ or goes via GDAL. Confirmed with multiple reverse dependency checks over almost 900 CRAN packages.

• By default use PROJ function to extract the source CRS from a "BOUNDCRS". When +towgs84= is given, PROJ and GDAL see the apparent source Proj4 string as implicitly implying a coordinate operation transforming to target WGS84, leading to the WKT2 representation being a "BOUNDCRS", not a "PROJCRS" or "GEOGCRS", and thus causing misunderstandings later in searching for the most accurate coordinate operation for a transformation. May be controlled by setting the get_source_if_boundcrs= in sp::CRS() from sp 1.4-4 (2020-10-07). Confirmed with multiple reverse dependency checks over almost 900 CRAN packages.

• Add support for instantiating from "OGC:CRS84" to provide a guaranteed GIS/visualization axis order WGS84 instantiator (preferred to "EPSG:4326").

• Permit empty string in SRS_string= argument to sp::CRS() and functions called by it.

• Use GDAL ORSIsProjected() instead of simply looking for "+proj=longlat" in the Proj4 string representation where possible.

Version 1.5-16 (2020-08-07, rev. 1047-1050)

• Typo in C code; use try() around Area-of-Interest calculation for coordinate operations (email BDR, I forgot to re-check with PROJ-5.2.0/GDAL-2.2.4).

Version 1.5-15 (2020-08-04, rev. 1020-1046)

• Add support for instantiating from "ESRI:".

• Add Area-of-Interest to coordinate operation search (reduces the number of candidates found in many cases), and use in rgdal::spTransform() by default (use_aoi=FALSE to suppress); illustrate in vignette https://cran.r-project.org/web/packages/rgdal/vignettes/CRS_projections_transformations.html.

• Harden to condition on PROJ functions only available from 6.2.0; block "+proj=ob_tran tests for PROJ 6.0.0-6.1.1.

• Support PROJ CDN https://cdn.proj.org for on-demand download of transformation grids if requested by user; document in vignette https://cran.r-project.org/web/packages/rgdal/vignettes/CRS_projections_transformations.html.

Version 1.5-12 (2020-06-26, rev. 1007-1019)

• Further corrections to configure.ac for older PROJ/GDAL versions

Version 1.5-10 (2020-06-09, rev. 991-1006)

• Corrections to configure.ac for older PROJ/GDAL versions

Version 1.5-8 (2020-05-28, rev. 846-990)

• Released to match sp 1.4.0 (2020-02-21) to 1.4-2 (2020-05-20) following months of development adapting to breaking changes in the external libraries used here: PROJ and GDAL; see also https://cran.r-project.org/web/packages/sp/news.html.

• Expose options("rgdal_show_exportToProj4_warnings"="none") to mute Proj4 string degradation warnings.

• Add new vignette https://cran.r-project.org/web/packages/rgdal/vignettes/CRS_projections_transformations.html.

• CRAN Windows binary uses PROJ >= 6 and GDAL >= 3

• Add PROJ-based CRS comparison: compare_CRS().

• project() and spTransform() use WKT2 comment if available, fallback to Proj4 representation if not.

• List coordinate operations (based on pyproj code): list_coordOps().

• Add enforce_xy= arguments to try to ensure that only GIS/visualization axis order is present.

• Add "CRS" object comment carrying WKT2 (2019) multiline string representation on read operations.

• Use "CRS" object comment carrying WKT2 (2019) multiline string representation on write operations.

Versions 1.4-7 and 1.4-8

• Fixed configure issue for R 4.0.0

• Fixed length of class() errors for matrices becoming arrays in R 4.0.0

Version 1.4-6 (Final pre-WKT2 release)