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STATVIEW represents a useful open source tool that can be conveniently shared among NSOs for analysing, visualising and sharing cartographic data in a machine-readable format.
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1. AN INNOVATIVE WEBGIS SYSTEM FOR DISSEMINATION AND
VISUALIZATION OF OFFICIAL STATISTICS AND GEOSPATIAL ANALYSIS
Emanuela Recchini, Alessandro Capezzuoli
www.statview.eu
Conference of European Statistics Stakeholders
Budapest, 20-21 October 2016
2. Official statistics: solicitations from ESS Vision 2020
3
5
2
1
4
Concluding remarks
A webGIS system for visualization, dissemination and geospatial analysis
Data visualization, webGIS and statistical data
Formats, standards and methods for data dissemination
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
3. 1. Official statistics: solicitations from ESS Vision 2020
1
Official statistics, characterized by the highest quality possible inasmuch as they are produced in
compliance with the UN Fundamental Principles of Official Statistics and the European Statistics Code of
Practice, play an essential role in supporting analysis and decision making.
Information and knowledge are
fundamental building blocks
for all modern societies
Quality is an overarching
element in the statistical
production process
Solicited by ESS, National Statistical Offices (NSOs) have started exploring new technology-driven areas when dealing with
very large amount of data and are developing suitable tools for the integration of different types of information and its
dissemination, i.e. platforms for data storage, analysis and visualization.
The ESS Vision 2020 recognizes:
• the importance to complement existing data derived
from traditional sources, with newer emerging ones,
including geospatial and big data
• the relevance and the opportunity of sharing tools
within the ESS
• the usefulness of proper dissemination channels that
meet the needs of as many people as possible.
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
4. eXtensible Markup Language
relies on the use of a Service Oriented Architecture - SOA
W3C open standard formats: XML vs JSON
2. Formats, standards and methods for data dissemination
Javascript Object Notation
relies on the use of a Resource Oriented Architecture - ROA
- is not a standard, is just an
architecture style for designing
networked applications
- is a lightweight alternative to
mechanisms like RPC (Remote
Procedure Calls) and Web
Services (SOAP, WSDL, etc.)
- is a service concept that may
be summarized by the CRUD
principles
REPRESENTATIONAL STATE TRANSFER (REST)
2
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
5. RESTful – Systems conforming to the
REST constraints
SOAP – Simple Objects Access Protocol
REST WEBSERVICES
Architectures for data visualization
Can be used as
Application Programming Interface
(API)
3
2. Formats, standards and methods for data dissemination
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
6. The Italian National Institute of Statistics (Istat) uses several channels for data
dissemination:
The Istat experience
Data dissemination in Official statistics
The single exit point for exchanging and supplying data to Eurostat and other
institutional subjects through the SDMX format
I.STAT, a web channel allowing data downloading in several formats
(csv, excel, etc.)
A set of API REST to disseminate data in the JSON-stat format
3. Data visualization, webGIS and statistical data
Istat, like other NSOs, uses the JSON-stat format for its data dissemination
4
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
7. An example of JSON-STAT output
3. Data visualization, webGIS and statistical data
5
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
8. The JSON-stat format is a simple lightweight JSON format for data
dissemination. It is based on a cube model that arises from the evidence that
the most common form of data dissemination is the tabular form.
JSON-STAT, SDMX, ODATA
The JSON-stat format
In this cube model, datasets are
organized in dimensions. Dimensions
are organized in categories.
JSON-stat has been the starting point
for the development of StatVIEW
3. Data visualization, webGIS and statistical data
6
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
9. JSON-STAT, SDMX, ODATA
WebGIS and statistical data platform
➢ Data dissemination and cartographic visualisation
➢ Dynamic territorial analysis
➢ Production of ad hoc applications for analysis and
treatment of specific phenomena
➢ Data integration using REST (or SOAP) webservices and
a standard for data representation (e.g. JSON-STAT),
differently usable by a relational database designed on
the basis of an Entity–Relationship model.
➢ Reaching a wider and more diversified audience, in as
much as they satisfy numerous needs of analysis
3. Data visualisation, webGIS and statistical data
7
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
10. 4. A webGIS system for visualization, dissemination and geospatial analysis
StatVIEW is a web GIS and statistical data platform comprising:
1) Map Server and a geospatial database (Geoserver, Postgres, PostGIS)
2) Different data sources (datawarehouse, webservices, database, etc.)
3) Interrogation engine and user interface
WMS
WFS
WCS
StatVIEW:
• Highly scalable system
o Supports different data sources (database, files, webservices)
o Supports different models for open data sources (SDMX, DDI, JSON-STAT)
o Supports different formats for open data sources (XML, JSON)
• Source output in JSON-stat format
8
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
11. JSON-STAT, SDMX, ODATA
StatVIEW (www.statview.eu) allows users
to carry out operations normally included in
GIS Desktop and WebGIS systems:
● Buffering
● Network analysis
● Topology Overlay
9
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
12. 10
MICROSERVICE
Architecture
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
13. 4. A webGIS system for visualization, dissemination and geospatial analysis
A density map for vehicles
involved in road accidents
DENSITY MAP
Representation type
(cartography, graphic, table)
Customize the
research
arch
Dimensions associated
to the dataset
11
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
14. A dynamic graph for vehicles involved
in road accidents
DYNAMIC GRAPH
12
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
15. A table for vehicles involved in road accidents
realized with JSON-stat Table Browser
TABLE
13
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
16. By selecting the layers and, for example, a different base map, or a
different color shade, or a different partition (quartile, quintile), it is
possible to get a different visualization, leading to a different
interpretation of the phenomenon.
The customization depends on the layers available in the chosen map.
OVERLAY: Map - residence permits of non-EU citizens
Another layer creates, via a
geospatial query, a bubble chart
representing the number of the
georeferenced organizations
active in the territory
One layer contains the
georeferenced organizations
providing assistance to migrants
14
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
17. By using an OSRM (Open Source Routing Machine) routing algorithm, it is possible to obtain
the shortest route to a geo-localised point in the map server used by StatVIEW (e.g. hospital,
police station, etc.) from any point in the map, as well as the respective travel time.
Routing
15
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
18. It is possible to set the maximum distance
or the distance range for the desired flows.
For example, we may be interested in
visualizing the flows within 100 km from a
given Province, or within a distance
ranging 100-300 km.
Changes of residence for foreign
citizens to and from Italian Provinces
It is possible to represent inflows and
outflows to and from a given territorial
border.
The dimension of the arrows gives an idea
of volumes: the thicker the arrow, the
greater the flow.
INTERNAL FLOW
16
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
19. This example shows the
evolution of employment data
at the regional level
ITALIAN REGIONS
17
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
20. This example shows the Romanian
citizens who are resident in the Italian
Lazio Region at the municipal level
ITALIAN MUNICIPALITIES
18
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
21. In the example a pyramid graph
showing the age of foreign citizens
resident in Italy, compared to that of
resident Italian citizens
The standardization of the sources’
output allows the creation of ad hoc
plugins for the generalized visualization
of multi-source graphs or dashboards.
PYRAMID GRAPH
19
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
22. The case of management of immigration
centres provides an example of how StatVIEW,
thanks to the support of geospatial database,
allows users to develop ad hoc applications.
The map indicates the position of immigration
centres.
The colours indicate the number of available
accommodations (red = no accommodation
available; orange = few accommodations
available; green = many accommodations
available).
By clicking on the marker of an immigration
centre, an interested user (like, for example, a
Prefecture) can book a certain number of
accommodations, in order to equally distribute
immigrants.
In a reserved area, it is possible to insert a new
immigration centre (e.g. Via Diego Cadello, 9,
Cagliari, Italy, Lat 39.238140, Lng 9.118743)
that, thanks to the geospatial database, will be
immediately visualized on the map.
AD HOC WEB APPLICATION
20
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
23. HEATMAP
21
Heatmap of private museums, monuments and archeological areas in Italy
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
24. CLUSTERING
22
Marker clusters of private museums, monuments and archeological areas in Italy
4. A webGIS system for visualization, dissemination and geospatial analysis
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016
25. With the support of StatVIEW, it is easier for research work to
analyze a specific phenomenon, overlay different layers to
describe several phenomena as a whole and quickly monitor
the evolution of different phenomena at the same time.
5. Concluding remarks
This helps to highlight the possible connections between
phenomena or the impacts that the phenomena under
investigation have on each other, thus facilitating the analysis and
the drafting of proper and early-warning advice for decision
making.
According to the ESS Vision 2020, developing an ESS that engages users
proactively and meets their demands in a cost-efficient and responsive manner is
one aim of the EU agenda. A webGIS system such as StatVIEW is along these
lines. In providing high quality information, StatVIEW is time saving and cost-
effective. It represents a useful open source tool that can be conveniently
shared among NSOs for analyzing, visualizing and sharing statistical and
cartographic data in a machine-readable format.
23
An innovative webGIS system for dissemination and visualization of official statistics and geospatial analysis
Emanuela Recchini, Alessandro Capezzuoli – Conference of European Statistics Stakeholders, Budapest, 20-21 October 2016