## 2 CLARA WebGIS: Data Sources
### Open Data  
Open data from the following three sources was used: (i) Regional Spatial Data Infrastructure of the Basilicata Region (RSDI) [55], (ii) OpenData (OD) Matera [56], and (iii) Italian National Institute of Statistics (ISTAT) [57]. RSDI is the main channel of the Basilicata Region for disseminating updated territorial information with technical and thematic cartographic production. OD Matera is a catalogue that allows users to search, access, download, and preview open data relative to the city of Matera through a single access point. ISTAT is a public research organization producing official statistics and operating in tandem with the academic and scientific communities. Two shapefiles from RSDI (original names: 'edifici_is' and 'unita volumetrica'), one from OD Matera portal (original name: rmc_4326.shp), and two from ISTAT (original names: 'R17_11_WGS84' and 'R17_indicatori_2011_sezioni') were downloaded and used for CLARA WebGIS. From the merging of the data contained therein, it was possible to obtain a new shapefile consisting of 4043 buildings, each with information relating to building typology (Figure 1A; masonry, reinforced concrete moment-resisting frame buildings, etc.), year of construction (Figure 1B), use and state of conservation (Figure 1C), and (eaves and maximum) heights (Figure 1D). ISTAT shapefiles contain a series of census variables, the municipal administrative limits, and the census sections of the study area, from which the SASSI area has been excluded (Figure 1).  
For the 2648 buildings reported in OD Matera portal, there is a prevalence of reinforced concrete (~70%) compared to masonry (~27%) (Figure 1A). In general, a good (~51%) and very good (~42%) state of conservation is reported for residential buildings, with few buildings in poor and mediocre condition (~7%), which often corresponds to those of older construction (as of last release, 14 February 2018) (Figure 1B,C). The ISTAT data aggregated by neighbourhood allow us to make considerations and assessments on a territorial scale., i.e., the historic districts of the city (Piccianello, Historical Centre, Cappuccini-Agna) mainly consist of masonry dwellings, while the more recently urbanized districts show a prevalence of reinforced concrete moment-resisting frame buildings with a better state of conservation (Figure 2).  
\begin{table}
\begin{tabular}{c c c c} \hline
**CLARA** & **Vector Geometry** & **\#** & **Download** \\ \hline Geology & polygon & 13 & - \\ \hline MOPS & polygon & 52 & - \\ \hline Building resonance level & polygon & 4043 & - \\ \hline Building frequency & polygon & 4043 & - \\ \hline Soil softrequency map & polygon & 7652 & - \\ \hline Soil isoamplitude map & polygon & 7652 & - \\ \hline DSM m (Orthometric Heights) & raster & - & - \\ \hline DSM blg Height & raster & - & - \\ \hline \end{tabular} \({}^{1}\) * and ** indicate pre-existing and new geological/geophysical downloadable data, respectively.  
\end{table}
Table 1: Cont.  
Figure 1: Spatial distribution of building characteristics: (**A**) building typology; (**B**) year of construction; (**C**) state of conservation; (**D**) height max (m). The black dashed line encloses the ‘SASSI’ area (not included in this study). The red dashed line delimits the urban area on which the study is focused.