projsync

Added in version 7.0.0.

Tool for synchronizing PROJ datum and transformation support data.

Synopsis

projsync
[--endpoint URL]
[--local-geojson-file FILENAME]
([--user-writable-directory] | [--system-directory] | [--target-dir DIRNAME])
[--bbox west_long,south_lat,east_long,north_lat]
[--spatial-test contains|intersects]
[--source-id ID] [--area-of-use NAME]
[--file NAME]
[--all] [--exclude-world-coverage]
[--quiet | --verbose] [--dry-run] [--list-files]
[--no-version-filtering]

Description

projsync is a program that downloads remote resource files into a local directory. This is an alternative to downloading a proj-data-X.Y.Z archive file, or using the on-demand networking capabilities of PROJ.

The following control parameters can appear in any order:

--endpoint URL

Defines the URL where to download the master files.geojson file and then the resource files. Defaults to the value set in proj.ini

--local-geojson-file FILENAME

Defines the filename for the master GeoJSON files that references resources. Defaults to ${endpoint}/files.geojson

--user-writable-directory

Specifies that resource files must be downloaded in the user writable directory. This is the default.

--system-directory

Specifies that resource files must be downloaded in the ${installation_prefix}/share/proj directory. The user launching projsync should make sure it has writing rights in that directory.

--target-dir DIRNAME

Directory into which resource files must be downloaded.

--bbox west_long,south_lat,east_long,north_lat

Specify an area of interest to restrict the resources to download. The area of interest is specified as a bounding box with geographic coordinates, expressed in degrees in a unspecified geographic CRS. west_long and east_long should be in the [-180,180] range, and south_lat and north_lat in the [-90,90]. west_long is generally lower than east_long, except in the case where the area of interest crosses the antimeridian.

--spatial-test contains|intersects

Specify how the extent of the resource files are compared to the area of use specified explicitly with --bbox. By default, any resource files whose extent intersects the value specified by --bbox will be selected. If using the contains strategy, only resource files whose extent is contained in the value specified by --bbox will be selected.

--source-id ID

Restrict resource files to be downloaded to those whose source_id property contains the ID value. Specifying ? as ID will list all possible values.

--area-of-use NAME

Restrict resource files to be downloaded to those whose area_of_use property contains the NAME value. Specifying ? as NAME will list all possible values.

--file NAME

Restrict resource files to be downloaded to those whose name property contains the NAME value. Specifying ? as NAME will list all possible values.

--all

Ask to download all files.

--exclude-world-coverage

Exclude files which have world coverage.

-q / --quiet

Quiet mode

--verbose

Added in version 8.1.

Verbose mode (more than default)

--dry-run

Simulate the behavior of the tool without downloading resource files.

--list-files

List file names, with the source_id and area_of_use properties.

--no-version-filtering

Added in version 8.1.

By default, projsync only downloads files that are compatible of the PROJ_DATA.VERSION metadata of proj.db, taking into account the version_added and version_removed properties of entries in files.geojson. When specifying this switch, all files referenced in files.geojson will be candidate (combined with other filters).

At least one of --list-files, --file, --source-id, --area-of-use, --bbox or --all must be specified.

Options --file, --source-id, --area-of-use and --bbox are combined with a AND logic.

Examples

  1. Download all resource files

projsync --all

  1. Download resource files covering specified point and attributed to an agency

projsync --source-id fr_ign --bbox 2,49,2,49