the large-scale reference database (lrd) · the large-scale reference database (lrd) liesbet de...
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www.vlaanderen.be\informatievlaanderen
the uniform topographical referencevoor geo-information in Flanders
The Large-scaleReference Database (LRD)
Liesbet De Wolf
Hendrik Van Hemelryck
FlandersInformation
Agency
308 municipalities
2068 private
partners
978 public
partners
6,4 M citizens
3 regions
Federal government
> Large-scale Reference Database
Geographical Base map of Flanders
Object oriented database
Authentic data source since 1/1/2016
What is the LRD?
What is the LRD?
The LRD contains among others :
4.300.000buildings
64.000km roads
4.700.000parcels
40.000km curbstones
1.300.000poles
1.000.000manholes
20.000km canals
11.000bus shelter
> Public-private partnership
Flemish government - utility companies
50/50 financing
Production cost: about 93 million Euro
Update cost (annually): about 7 million Euro
> LRD-decree (2004)
Management and update
Financing
Mandatory use and error reporting for public bodies
What is the LRD?
LRD-product
Error reporting and update
> Localisation of errors or missing objects
reported by external users7160
10072
14472 12985
0
2000
4000
6000
8000
10000
12000
14000
16000
2013 2014 2015 2016
Number of errors reported by external users / year
LRD-product
Error reporting and update
> Localisation of errors or missing objects
reported by external users
detected during internalcontrol processes
> Validation
> Validated errors drive different interlockingupdate processes
LRD update processes
…
UPDATED
Update processes
Update public domain Update private domain
As-built drawingsAlignment parcels -buildings
Update parcels
Screening + update public domain
• public domain + 20m
• field measurements
• every 6 months - 1 year
• areas notaccessible forsurveyors
• photogrammetricmeasurements
• every 2 - 3 years
• public domain + 20m
• screening forerrors + update
• field measurements
• every 4 years
• topologicalalignment of buildings andparcels
• update of parcels
• merge, split, redivision
• every year
• at the end of road works
• mandatory forthe promotor of public works
Update processes
1.700
24.000
370.000
88.000
57.000
900.000
20151.400
26.000
190.000
85.000
55.000
510.000
2016
new building, demolished building, renovated building by surveyors
road-related changes (eg new pole, new bus shelter, …)
km construction and reconstruction of roads
new building, demolished building, renovated building by photogrammetry
merge, split, redivision of parcels
topological alignment of buildings- parcels
Situ
atio
n0
5/0
9/2
01
6
Distribution
• GIS-format (shp, gml)
• CAD-format (dxf)
• 3D buildings (shp, kml)
• WMS• one layer/object• base map• base map grey• selection• 3D buildings
• WMTS
• WFS• Central portal forgeographical information
• Online viewer (www.geopunt.be)
DO
WN
LOA
D
SER
VIC
ES
VIE
W
INSPIRE compliant
Met
adat
a IN
SPIR
E co
mp
lian
t
> Every day new version of the LRD
> WMS en WFS deliver most up-to-date information
> WMTS (map tile service)
intelligent change detection system
> for updating and deleting of cached files
timeshift between WMS and WMTS is minimal
> Monitoring and logging services
Webservices
Update proces LRD webservices
Available for free (use and re-use)
Registration necessary
The LRD is Open Data
0
500
1000
1500
2000
2500
3000
3500
Number of orders / month
number of orders increased from 600/month to 2500/month on average
LRD Open data
User applications and examples (1)
LRD as a uniform reference for
mapping underground cables and
pipes
Platform for exchange of plans of
underground infrastructure
between utilities companies and
contractors
User applications and examples (2)
Online application to
request for a building
permit
LRD parcel and building
geometry are selected and
can be downloaded using
WFS to make a site plan
User applications and examples (3)
GIS analyses: e.g. calculation
of evacuation zone when a
freight train loaded with
toxic chemicals derailed on
04/05/2013
User applications and examples (4)
Used by police services as a reference background to make accident reconstruction
drawings
User applications and examples (5)
Real estate platform, trying
to quantify housing and
neighbourhood parameters
Using LRD cadastral
information (parcels and
buidings) to make rough
estimates about real estate
value
Parcels
Registries contains core information
Different registries work together
From the LRD to base registries
> 2015: project ‘(geographical) base registries’
Buildings
RoadsAddresses
From the LRD to base registries
Modelling based on well-known
business processes and rules
Validated by stakeholders
Semantic compliance with INSPIRE
data specifications allows for data
harmonisation
Coordination on an interfederal
level between Flemish Region,
Walloon Region, Brussels-Capital
Region and federal entities
Registries contains core information
Different registries work together
Persistent identifiers and well defined lifecycle
Compulsory use and error reporting
Free open data
Combination of centralized and decentralized
management
From the LRD to base registries
> 2015: project ‘(geographical) base registries’
design
authorised
underconstruction
functional
decommissioned
demolished
LRD
From the LRD to base registries Authorized users can add registry objects and update attribute information
When present on the terrain, the LRD will provide the most accurate geometry for each object
ParcelsBuildings
RoadsAddresses
Questions?
https://www.agiv.be/international/en/products/grb-en