How we calculate the ratings

Three colours and a grey

Each section of the report has a rating:

• Favourable (green): no problems emerge at this point for that topic.
• Worth considering (yellow): there is something to look into, for example a hazard area nearby or a medium seismic zone.
• Critical (red): the figure needs attention before you decide, for example a parcel in an area that floods frequently.
• Informational (grey): the section describes without judging, like the cadastral parcel or the population.

We do not give an overall score: risks, services and prices cannot be added together.

Landslides

What counts is the most severe hazard level on the parcel and, with less weight, in the surrounding 100 metres. Very high (P4) and high (P3) hazard areas on the parcel give a critical rating; medium (P2), moderate (P1) and attention areas lead to "worth considering". Landslides recorded in the IFFI inventory that touch the parcel or the surrounding 100 metres also lead to "worth considering".

Flooding

What counts is the most frequent flood scenario affecting the parcel: frequent floods (P3) give a critical rating, less frequent (P2) and rare (P1) floods lead to "worth considering". A scenario that only affects the surrounding 100 metres carries less weight. The meaning of the levels is explained in Flood zones P1, P2 and P3.

Earthquakes

What counts is the higher of the municipality's seismic zone and the expected ground acceleration at the point (PGA), using the same thresholds as the zones: above 0.25 g counts as zone 1, between 0.15 and 0.25 g as zone 2, between 0.05 and 0.15 g as zone 3.

Services and transport

For services, what counts is the distance to the nearest one in each category: close if it is within 500 metres, less close if it is within 1 kilometre. For transport, what counts is the stops within 500 metres and the type of lines.

When a figure is missing

If a source does not cover the address (for example cadastral maps in the province of Bolzano, or timetables in a city without open data) the section says "not available" and explains why. We do not fill the gaps with estimates.

Updates

Each source has its own schedule: cadastral maps every six months, local prices twice a year, street numbers and services every month. The date of each figure is shown under the section. The full list is on Where the data comes from.

Thresholds may change when the sources change: if that happens, we update this page.