manage BD Topo

Management of BD Topo database

BD Topo is a DB that describes the lad use in France in a vector format. Current version is 3.0. It has many layers, all of them are interesting, but are not treated in floodam.data.

There are 3 formats for the archives :

• SHP, normally this format can be handled by floodam.data but it is no more a priority
• GPKG, which is the one that should be treated by floodam.data
• SQL, not handled at the moment in floodam.data (and not a goal for version 1.0.0.0)

BD Topo can be downloaded from IGN or from data.cquest :

• https://geoservices.ign.fr/bdtopo gives the link to archives for IGN. It is not clear if all releases are available. Apparently, one per year, at least.
• https://data.cquest.org/ign/bdtopo/ gives the link to archive without restriction in terms of date. It is organized by release in terms of date (one release, one folder).

Functions/dataset to be added

• download_bd_topo
  • description download the data from official repository (and data.cquest as it is by far more reliable...)
  • adaptation of download.bd_topo
  • use new journal (add_log_info)
  • output archive in original version
• adapt_bd_topo
  • description format the data from official repository in aimed data based on scheme_bd_topo_3_0
  • should be something that encapsulates extract_building, extract_dwelling
  • define first all layers of interest and the view needed (complete the lis, we will decide fater if included in version 1.0.0.0 or later)
    • extract_building_agriculture
    • extract_road
  • use new journal (add_log_info)
  • output: archive in formatted version
• scheme_bd_topo_3_2
  • description global data to be used for formatting data
  • verification of what has already be done in scheme_bd_topo_3 (that should be replaced)
  • it could be interesting to complete scheme with former version also !
• analyse_bd_topo
  • description some analyses to be performed after downloading and formatting.
  • should be something that encapsulates analyse_dwelling and further analyses.
• vignettes/bd_topo_fr
  • description presentation of the data in French
  • complete what has already be done
• vignettes/bd_topo_en
  • description presentation of the data in English
  • complete what has already be done, from tanslation of bd_topo_fr when it is done

For each function/dataset. Please follow this procedure

• creation of function
  • code of function
  • documentation of function
  • example for function
  • test for function
• creation of dataset
  • script for creation of "raw" data (if needed)
  • storage of raw data in ascii format, normally in inst/extdata
  • script in to maintain data in /data-raw
  • documentation of data