Access to and use of spatial data from the National Survey and Cadastre in Denmark

Access to and use of spatial data from the National Survey and

Cadastre in Denmarkby

Michael Berg RasmussenStatistics Denmark

Spatial data from the National Survey and Cadastre

• Rational and methodical mapping have been carried out in Denmark since 1757

• In 1989 all mapping activities were gathered together in the newly established Danish National Survey and Cadastre (KMS)

• In the middle of 1990’s KMS started to digitalized their spatial data

Statistics Denmark use of spatial data from the National Survey and Cadastre

2000-2008(1)• In 2000 Statistics Denmark (DSt) got digitalized

administrative maps (counties, municipalities and parishes) on payment of a yearly charge to KMS - mostly used for promotion purposes.

• In 2006 DSt started a particular cooperation free of charge with KMS concerning the census on urban areas. KMS delivers the demarcations of the built-up areas every year.


2000-2008(2)

• …but to use other form of spatial data from KMS was

very expensive!!


2009 (1)• But the Danish Government wanted to modernize

and digitize the public sector…• …so a new financial model for obtaining access to

the spatial data was made.• On January 1 2009 a new governmental

agreement came into force, which…• …means, that governmental authorities,

educational institutions, state museums and common public portals are secured freely access to use spatial data and related services from KMS.


2009 (2)• Access to a wide range of KMS’ products• The products can be used free of charge, when

the purpose are internal affairs and official statistics imposed by the authorities

• For external purposes (e.g. customised tasks) a charge must be paid to KMS

Spatial data in DSt from KMS(1)

• DAGI-maps = Danish administrative borders– Regions, provinces

and counties– Municipalities– Postal areas and

parishes– Constituencies


• Detailed topographical vector spatial data in 1:10,000 - Kort10 (Map10)– Built-up areas– Buildings– Hydrographical

conditions– Culture– Nature– Technique– Traffic– Place names

Themes in Map10 (1)

Built-up areas• Town centre• High built-up areas• Low built-up areas• Industry

Themes in Map10 (2)

Buildings• Buildings• Greenhouses• Tank/silo

Themes in Map10 (3)

Hydrographical conditions

• Bathing jetty• Ditches• Harbours• Groynes• Coast lines• Lakes• Stream banks• Streams• Pipe fitted streams• Land

Themes in Map10 (4)

Culture• Relics of the past• Cemeteries• Recreational areas• Sport centres

Themes in Map10 (5)

Technique• Reservoirs• Fence• High-voltage

transmission lines• Parking areas• Technically areas• Television pylons• Windmills

Themes in Map10 (6)

Nature• Boundaries of use• Dams and embankments• Dikes• Market gardens and

nurseries• Moor• Quickset hedge• Triangulation point• Gravel pits• Sand and dunes• Forests and woods• Cliffs• Groves• Wetland

Themes in Map10 (7)

Traffic• Bus lane• Railroad• Motorway• Stops and halts• Paths• Roads (3-6 m broad)• Roads (>6 m broad)• Other roads


• Another generalized topographical vector spatial data in 1:10,000 in accordance with FOT– Spatial data made as

combination of data from KMS and the local municipalities

– Same themes as in Kort10(Map10)


• Generalized topographical vector spatial data in 1:500,000– Cities and towns– Main roads– Forests– Streams


• The Danish Cadastre– The basis for all land registration in Denmark

consisting of:• An official cadastral register• A countrywide cadastral map


Addresses and their x,y-coordinates


• The Digital Map Supply– Receipt of

topographical maps via internet servers

• WMS-service• WFS-service

Use of KMS-data in DSt

• All received spatial KMS-data are stored in both shape-format for ArcGIS and in an Oracle-database

• Official statistics– Areas of parishes– Census and areas on

the Danish islands

• Statistics for sale

Renewed statistics of the parish areas (1)

• For many years the area-statistics was built on a surveying made by KMS in the 1950’s

• Lack of areas in the old market towns• Other places the areas were published as the sum

of more parishes together• Every year the areas of some parishes are

changed. Information about that are given from the Ministry of Ecclesiastical Affairs and manual changed in DSt’s calculation errors were made and accumulated through the years

• A renewal of this statistics were needed


• The Danish Cadastre contains an information about parish membership

• A statistics of the parish areas can be made by writing a simple SQL-expression up against the Oracle database:


• …to be put in the periodical and the databank.

Municipality no. Municipality Parish no. Parish

Sum of the

cadastras area

825 Læsø Kommune 8437 Byrum 61281809825 Læsø Kommune 8438 Hals 23814101825 Læsø Kommune 8439 Vesterø 33296230

Parish areas

• An easy and quick way to make a statistic…

Some things to be aware of when using the Danish Cadastre (1)

• A great deal of parishes are partial parishes – i.e. they are situated in more then one municipality

• The SQL-expression takes allowance for these special conditions


• Some places the lakes are registered in the Danish Cadastra and some places they are not!


• The municipality of Copenhagen doesn’t register certain areas as streets, railway tracks, newly reclaimed land and graveyards as cadastre The parish areas in Copenhagen are underestimated.


• In south-western part of Denmark are the Wadden Sea – a tidal area. These areas are already registered as cadastres although half time under seawater The parish areas in these areas are overestimated.


• In creating the new statistics some parish areas may show a markedly difference from the old calculation

• In some cases the cause are an adjustment of the border between two parishes

• In other cases it can simply not been explained!

Renewed statistics of the Danish islands (1)

• Population on the islands have been counted regularly since 1901

• Since 1976 the population on the Danish islands have been calculated by:– manual demarcating the parishes that belongs to

the islands– manual demarcating which roads, that are

belonging to the islands…– …and then in the Central Population Register (CPR)

find out how many person are living on these roads

• A comparatively safe method but…• From 2011 this method is supplied by GIS


• The land-theme from Kort10 can be subdivided into single island-polygons

• Every inhabited access address are provided with x,y-coordinates and placed relative to the island-polygons

• Number of persons on the access-addresses are sum up The population on the islands

• New method has not completely replaced the old because also here there can be some mistakes in the x,y-coordinates


• A couple of new inhabited island were found and put into the census!

• For the moment the island-census is therefore a combination of a register-method and a GIS-method.


• The area-statistics of the islands was built on a surveying made by KMS in the 1950’s

• Perhaps not a big problem but…– Some places land is reclaimed from the sea e.g.

• expansion of a harbour • building of a new bridge

– Coastal processes are active• The coast lines are undermined• Calm sea areas are sanded up

• A new area estimation for the islands were needed


• From the land-theme in Kort10 the islands were isolated and their areas were calculated…


• …and in a quick and easy way a new statistics of the islands have been created.

Future work in DSt involving KMS-data

• A new estimation of the Danish coastline distributed over Danish provinces

• Peoples proximity to nature (forests, parks, beaches etc.)

Documents

Access to and use of spatial data from the National Survey and Cadastre in Denmark