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Igor Kuzma, Statistical Office of the Republic of Slovenia
Tomaž Žagar, Geodetic Institute of Slovenia
GIS Portal – dissemination of geostatistics
Overview
Dissemination system
- data
- spatial resolution
- confidentiality & terms of use
KASPeR…
Perspectives & conclusions
EFGS - Lisboa 2011 2
Overview
Geostatistics of higher resolution since Census 1971
Practically applicable since 1981 (Registers)
- mostly point located
- various methodologies
- grid data
National grid system
- D48/GK & D96/TM
- smallest grid 100 m X 100 m
EFGS - Lisboa 2011 3
Overview
National grid system
- defined in D96(ETRS89)/TM
- reprojected to D48/GK
- linked by cell IDs
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Overview
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Overview
x,y x,yx,y - false coordinate
- covering the same area
- no overlapping problem
- applicable to old datasets in D48/GK
- regular square gird cell for data presentation
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Dissemination system - data
Population - number, sex, age groups, activity (yes/no), education (3 levels)
Households - number, size
Dwellings - number, area (classes)
Buildings - number, age (classes)
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Building an Interactive Mapping Atlas 8
Register of Spatial Units
Register of Real Estate
Tax RegisterBussines Register
Statistical Registerof Employment
Register of Dwellings
Central PopulationRegister
CensusesStatistical surveys
Dissemination system - data
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Dissemination system – spatial resolution
Administrative units
- Cohesion regions (NUTS 2)
- Statistical regions (NUTS 3)
- Municipalities (LAU 2)
- Settlements
Grids
- 10km, 5km, 2.5km, 1km, 500m, 100m
Other
- e.g. areas defined in municipial spatial plansEFGS - Lisboa 2011 9
Dissemination system – confidentiality & terms of use
no suppression for current variables
free access and download
source should be acknowledged
high spatial resolution friendly data suppression
grid dissemination rules applied to „other areas“
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KASPeR
Web mapping application for visualization of (statistical) data by selecting spatial units in combination with various cartographic layers from the Google Maps tool.
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KASPeR - features
Powered by Google• Google maps
cartographic layers• Google maps search
feature
...
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KASPeR - features
Spatial levels
• Automatic zoom option
• Extendable (new levels can easily be added)
• Input file formats:– ESRI Shapefiles *.shp
– Google Earth *.kml
– Geography Markup Language (*.gml)
...
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Kasper - features
Content• Extandable menu• Input file formats:
– ESRI shape files (*.dbf)– PC-Axis (*.px)– Comma-separated
values (*.csv)... (spatial units – defined in
spatial levels file – have to be reffered by variables to be shown on the map)
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KASPeR - features
individual values for selected variables are obtained by moving the mouse over the spatial unit
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KASPeR - features
Adjustable legend classes
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KASPeR - features
Adjustable transparency of the data layer
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KASPeR - features
Charts are shown when clicked on the spatial unit.
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KASPeR - features
Explanatory data can be added to individual variables and/or to group of variables.
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KASPeR - featuresScreen data can be exported to PDF.
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Dissemination system in practiseK
AS
PeR
- b
ackg
roun
d
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Perspectives & conclusions
KASPeR
- time slider
- optional view function
- automatic upload & update from SI-STAT database
(*.px files)
- various colour schemes in the legend
- classification scheme
- „hide“ navigational/info window
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Perspectives & conclusions
User response
- foreign users prefer administrative units
- decision makers prefer grids to support various
strategic plans (spatial patterns, clusters)
- municipial spatial planners use 100m grid or areas
defined in municipial spatial plans
- media & conferences
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Perspectives & conclusions
INSPIRE
- INSPIRE grid
- metadata etc.
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Th
ank yo
u!
http://www.gis.si/kasper/en/index.html
http://www.stat.si/GIS/baza.aspx?lang=en
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