Outputs

All results are written under %LocalDataProjDir%. Intermediate results use the GeoDMS .fss format, which is fast to read and write but only usable inside GeoDMS. Deliverable results use GeoTIFF for grids and shapefile for polygons, both readable in any GIS.

Intermediate results

Path	Contents
RegionFiles/<date>_<region>.fss	OSM lines per Geofabrik region, read once from .pbf
Network_Setup/<continent>/Linkset_O-..._D-....fss	the initial link set of a continent
Network_Setup/<continent>/Final_Nodeset_O-..._D-....fss	the compressed node set
Network_Setup/<continent>/Final_Linkset_O-..._D-....fss	the compressed link set
Network_Setup/<continent>/Linkset_..._Pop-.fss	the change tracker linking original to final links

Next to the source data, in %NetworkModelWorld_DataDir%, the preparation steps also write Regions/fss/Countries.fss, Regions/fss/sep_units.fss, the land cell file next to the population raster, and the settlement centroid files per settlement type.

Deliverable results

Path	Format	Contents
Settlement_Hierarchy/<set>/<continent>.shp	shapefile	settlements with their hierarchy rank Maxl
Settlement_Catchments/<set>/<variant>/<continent>/<country>.shp	shapefile	catchment polygons with population and centre label
Settlement_Catchments/<set>/<variant>/mozaik/all_ran.shp	shapefile	all available country catchments in one file
Settlement_Accessibility/<set>/<continent>/<country>/tt/<variant>.tif	GeoTIFF	travel time in minutes to the nearest destination
Settlement_Accessibility/<set>/<continent>/<country>/td/<variant>.tif	GeoTIFF	network distance in km to the nearest destination
Functional_Rural_Areas/<set>/Base_<threshold>/<variant>/<continent>/<country>.shp	shapefile	functional rural areas
Functional_Rural_Areas/<set>/Base_<threshold>/mozaiks/<variant>.shp	shapefile	the same, mosaicked across countries
Distances_Travelled_Proxy/<pop>/<decay>/<continent>/<zone>/pot_ai.tif	GeoTIFF	potential accessibility per origin cell
Distances_Travelled_Proxy/<pop>/<decay>/<continent>/<zone>/av_di.tif	GeoTIFF	average network distance per origin cell
Distances_Travelled_Proxy/<pop>/<decay>/<continent>/<zone>/100m/flow.tif	GeoTIFF	modelled flow per 100 m cell
Distances_Travelled_Proxy/<pop>/<decay>/<continent>/<zone>/flow_<class>.tif	GeoTIFF	the same, split by road class
Distances_Travelled_Proxy/<pop>/<decay>/global_results/*.tif	GeoTIFF	global mosaics of the above
RoadLengths/<continent>/<class>.tif	GeoTIFF	road length per cell by road class
RoadLengths/_all/*.tif	GeoTIFF	global mosaics of the road lengths

Grids and projections

Two output grids are used, and it matters which is which.

• Results derived from the population grid, that is accessibility, potential accessibility and average distance, are on the population raster in World Mollweide at 1000 metre resolution. This is an equal area projection, so a cell is a cell everywhere and summing population over cells is correct.
• Results derived from road geometry, that is modelled flows and road lengths, are on the 100 metre WGS84 raster derived from built_s_wgs84_v1.tif. Cells here are not equal in area, which matters when comparing totals between latitudes but not when comparing flow to road length within a cell.

Accessibility grids are cut to the bounding box of their country, which keeps the files small but means they have to be mosaicked before global use.

Metadata

Every stored item is accompanied by an XML metadata file, generated from ExportSettings/MetaInfo. It records the GeoDMS version, the full name and expression of the item, the machine and user, the run parameters, and the output of git describe, git status and git rev-parse HEAD for the configuration. A result whose metadata shows uncommitted changes was produced by a configuration that no longer exists in the history, which is worth knowing when a number cannot be reproduced.

Reference data

The README of the repository lists download locations for prepared settlement, region and population data. The OSM .pbf files are available on request; they come from Geofabrik and take up tens of gigabytes even compressed.