Questo layer mostra il tempo di viaggio via terra, in minuti, da ogni pixel alla città più vicina con almeno 50.000 abitanti. È derivato dal dataset 'Accessibility to Cities' dell'Oxford Malaria Atlas Project (Oxford/MAP/accessibility_to_cities_2015_v1_0) su Google Earth Engine, a una risoluzione di circa 1 km per l'anno di riferimento 2015. I valori bassi (verde) indicano aree urbane e periurbane ben collegate, mentre i valori alti (rosso) indicano località remote e difficili da raggiungere.
The indicator measures the shortest land-based travel time (in minutes) from each location to the nearest city of 50,000 or more inhabitants. It is read directly from the Oxford Malaria Atlas Project global 'Accessibility to Cities' product, which combines a global friction surface (road networks, terrain, and land cover) with a least-cost path algorithm over urban destinations. It is a static 2015 snapshot.
| Code | Provider | Resolution | Year |
|---|---|---|---|
| Oxford/MAP/accessibility_to_cities_2015_v1_0 | Oxford Malaria Atlas Project (via Google Earth Engine) | ~1 km | 2015 |
Method: The 'accessibility' band is clipped to the area of interest, reprojected, and sampled at 1 km scale; per-geometry statistics (minimum, maximum, and mean travel time in minutes) are computed over valid pixels, with negative values treated as no-data. The colour ramp runs from green (short travel time, accessible) through yellow to red (long travel time, remote), normalised over 0 to 360 minutes.