In this section you will find the list of categories and information about its calculation, the data source is also reported.

For this page in Italian. Click Here

#	Name	Data Source	Level	Unit	Coverage	Grouped by Administrative Units
1	Accomodation	OSM november/2019	EXACT	Number	*	**
2	Amenity	OSM november/2019	EXACT	Number	*	**
3	Education	OSM november/2019	EXACT	Number	*	**
4	Food	OSM november/2019	EXACT	Number	*	**
5	Health	OSM november/2019	EXACT	Number	*	**
6	Bank/Exchange	OSM november/2019	EXACT	Number	*	**
7	Shop	OSM november/2019	EXACT	Number	*	**
8	Sport	OSM november/2019	EXACT	Number	*	**
9	Tourism	OSM november/2019	EXACT	Number	*	**
10	Transport	OSM november/2019	EXACT	Number	*	**
11	Italian Population (total population by sex and age)	ISTAT 2011	CENSUS DISTRICT	Number	ITALY	Yes (Municipality)
12	Italian Average Age	ISTAT 2011	CENSUS DISTRICT	Number	ITALY	Yes (Municipality)
13	Foreigners+Apolides resident in Italy	ISTAT 2011	CENSUS DISTRICT	Number	ITALY	Yes (Municipality)
14	Italian Families	ISTAT 2011	CENSUS DISTRICT	Number	ITALY	Yes (Municipality)
15	Homes in Italy	ISTAT 2011	CENSUS DISTRICT	Number	ITALY	Yes (Municipality)
16	Residential Buildings in Italy	ISTAT 2011	CENSUS DISTRICT	Number	ITALY	Yes (Municipality)
17	Italian Income	MEF 2017	MUNICIPAL	Euros	ITALY	Yes (Municipality)
18	Italian Income	MEF 2018	MUNICIPAL	Euros	ITALY	Yes (Municipality)
19	England/Wales Population	ONS 2011	CENSUS DISTRICT	Number	ENGLAND/WALES	(Yes) District
20	England/Wales Average Age	ONS 2011	CENSUS DISTRICT	Number	ENGLAND/WALES	(Yes) District
21	UK Crime	POLICE UK 2018	EXACT	Number	UK	(Yes) England/Wales: district. Scotland: surburb. North Ireland: electoral division
22	French Population (total population by sex and age)	INSEE 2016	MUNICIPAL	Number	FRANCE	Yes (Municipality, arrondissement for Paris,Marseille and Lyon)
23	Switzerland Population (total population by sex and age)	STATPOP 2018	MUNICIPAL	Number	SWITZERLAND	Yes (Municipality)
24	South Africa Population (total population by group, by income and education level)	STATS SA 2011	WARDS	Number	SOUTH AFRICA	(Yes) Local Municipalities

(*) Iso4app covered countries

(**) Yes if the isoline is claculated in one of the following countries: Italy, France, Switzerland, UK, South Africa

Calculation logic based on level

EXACT

  Each datum is memorized with the relative GPS coordinate, so the calculation is exact.

CENSUS DISTRICT

The census district is the minimum unit managed by ISTAT. Having demographic data, these are stored with BUILD LINKING logic (see below).

WARDS

In South Africa, wards are geopolitical subdivisions of municipalities used for electoral purposes.

MUNICIPAL

The data at the municipal level, being referable to the population, are placed on the map according to the population calculated at the census district level, so also the data at the municipal level acquire a good accuracy.

BUILD LINKING

For each census district, from the map the residential buildings are read and their size are estimated. At the end of this calculation each building will have a weight in relation to the other buildings of the same census district.

In addition, on all residential areas, the system creates fictitious buildings equally distributed in it.

Having the population data for the census district this will be distributed on the buildings in relation to their weight.

Given that by now the cartography reports with good accuracy the buildings on the territory this methodology gives an excellent precision. In the case in which the census district indicates a population, but for the same the cartography does not show any building (it can happen in isolated areas of the countryside) the system, in order not to lose these values, creates fictitious buildings equally distributed in the census district.

As you can see in the following example image the areas with fewer houses, parks or squares, are those with a lighter color, so with low population density.