How do you read the location data and its colours?
Each location figure stands on its own, next to its reference: the region, Italy or, for air, the World Health Organization’s guideline values. A figure has a colour only if there is an average next to it and the direction is clear: green if it is at least 15 % more favourable, red if it is at least 15 % less favourable, orange in between. The dossier does not add up the colours and does not score the area.
Which figures there are
- The nearest railway station, in a straight line, and the bus and tram stops within 500 m.
- Services within 500 m in fourteen fixed categories (supermarkets, pharmacies, doctors, schools, parks and more), even when there are none.
- Offences reported per 100,000 inhabitants in the province, next to Italy (Istat).
- The share of the municipality’s residents in P3-P4 landslide areas, next to the region and Italy (ISPRA).
- PM2.5, PM10 and NO₂ as annual averages on a 1 km grid (European Environment Agency), next to the WHO guideline values (2021) and the European Union’s limits for 2030.
- The zone’s OMI range and the number of flags found for the location, with a link to their section.
Other data often matter for the same property too, such as the municipalities most exposed to landslides and the municipality’s seismic zone. You can see how a dossier brings them together in the sample dossier.
Which figures have a colour
Only two figures have a comparison with a clear direction: reported offences (the province next to Italy; fewer is more favourable) and residents in landslide areas (the municipality next to the region; fewer is more favourable). The others have no colour: prices are neither better nor worse, the counts of services and the distances have no average next to them, and air stands next to guideline values, not an average.
How the 15 % threshold works
The dossier compares the figure with its reference. An example: if 10 % of the region’s residents live in P3-P4 landslide areas, a municipality with 8 % is 20 % more favourable and turns green; a municipality with 11 % is 10 % less favourable and stays orange; with 12 % or more it turns red. When the figure and the reference are both very small (under 1 % for landslides), there is no colour: a tiny difference would say nothing.
Next to every colour there is a word, also on a black-and-white PDF: ‘better than the regional average’, ‘around the regional average’, ‘less favourable than the regional average’, or the national one.
Offences: a figure for the province
The number of offences is that of the province: it does not describe the address, the street or the neighbourhood. It counts the offences reported by the police to the judicial authority in the year, not the offences committed, and it is calculated on residents, while people who work in or pass through the province may also report or be involved. That is why the word next to the colour says ‘provincial figure’, and the dossier draws no conclusion about the area from it.
What it is not
It is not a score of the location and it does not say whether the area suits you: a nearby station can be handy if you work in town and noisy if you want quiet. Services and stops come from OpenStreetMap, a map made by volunteers: what is not mapped there counts as zero. Go and see the area in person, in the evening too.
What you find in the dossier
The Location data section opens with the figures side by side and below gives every item with its source and year.
See the location data in the sample dossier
Does red for offences mean the street is dangerous?
No. It is a figure for the province next to the Italian average: it says nothing about the street or the neighbourhood.
Why does air quality have no colour?
Because it stands next to the WHO guideline values and the European limits, not an average: with that reference almost every address would be red.
Does the dossier add the colours up into a mark?
No. Each colour applies to one figure only; there is no total.
Sources
- Istat: offences reported by the police
- ISPRA, IdroGEO
- European Environment Agency: air quality maps
- © OpenStreetMap contributors
Dossier Immobile is a private service by SRI Group BV (VAT BE1037052239), not connected to any public authority: it brings together public data, with the source and date of every item.
Updated on