Extract Layer Information from QGIS Project

Reads a QGIS project file (.qgs or .qgz) and extracts layer metadata, including menu name, provider, data source, and layer name.

Usage

ngr_spk_q_layer_info(path, attrs = c("id", "name", "source", "providerKey"))

Arguments

path

character A single file path to a QGIS project file. Must end with .qgs or .qgz.

attrs

character Optional. A character vector of XML attribute names to extract from each layer node. Defaults to c("id", "name", "source", "providerKey").

Value

A tibble::tibble with one row per layer, including extracted attributes, plus computed layer_name and time_exported, sorted alphabetically by name.

Details

If the input is a .qgz file, it will be unzipped to extract the internal project.qgs. The function then parses the XML structure of the project to extract layer information from <layer-tree-layer> nodes.

Returned columns include:

• name_menu: layer name as displayed in the QGIS menu

• provider: data provider key (e.g., ogr, gdal)

• source: absolute or relative path to the data source

• layer_name: the internal layer name string

• id: QGIS-assigned layer id

• time_exported: timestamp in format yyyymmdd hh::mm when the function was run

See also

Other spacehakr: ngr_spk_gdalwarp(), ngr_spk_join(), ngr_spk_layer_info(), ngr_spk_odm(), ngr_spk_poly_to_points(), ngr_spk_rast_ext(), ngr_spk_rast_not_empty(), ngr_spk_rast_rm_empty(), ngr_spk_res()

Examples

if (FALSE) { # \dontrun{
res <- ngr_spk_q_layer_info(
  "~/Projects/gis/ng_koot_west_2023/ng_koot_west_2023.qgs",
  attrs = c("id", "name", "source", "providerKey")
)
} # }