pre-combiled Mac binaries produce pj_obj_create: Cannot find proj.db message

[adokter]

The pre-compiled binary for Intel Macs on CRAN causes the following message repeatedly:

pj_obj_create: Cannot find proj.db

[adokter]

I presume that this has something to do with the CRAN system build not including a proj.db file in the binary, @andershenja is proj.db a hard requirement for RAVE, can we suppress this message?

[iskandari]

Same behavior on ARM-based Mac M2. This only occurs when you install the vol2birdR binary from CRAN but not when installing from source locally.

[adokter]

Setting PROJ_LIB silences this message, see https://gis.stackexchange.com/questions/326968/ogr2ogr-error-1-proj-pj-obj-create-cannot-find-proj-db#327266

Sys.setenv(PROJ_LIB = "local directory containing proj.db")

In case of my homebrew install:

Sys.setenv(PROJ_LIB = "/usr/local/Cellar/proj/9.2.0_1/share/proj")

However this remains a hurdle for people installing a binary from CRAN. It seems sf/terra packages have a more seamless solution implemented r-spatial/sf#1933