GIS System for Enumeration Areas Planning

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GIS Systemfor Enumeration Areas Planning
CSB of Latvia in cooperation with State Land
Service of Latvia European Forum for
Geostatistics 2008 Workshop Bled,
Slovenia October 1 3, 2008
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PROBLEM !

• Forthcoming Population Census 2011 in Latvia will
  be carried out in a classical way but using
  modern technology
• 2000 enumerators equipped with laptops will
  collect census data within 2000 enumeration areas
• How to split the territory of Latvia in 2000
  enumeration areas keeping in each area an exact
  number of people(1150 ) and avoiding natural
  obstacles (rivers, railways, motorways...)within
  the areas???

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• BASIC STATISTICAL INDICATORS
• Total area 64.6 thousand sq.km
• Population 2.3 million
• Districts 26
• Municipalities 530

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SOLUTION!

• Use GIS developed in accordance with the
  requirements elaborated by Experts of CSB
• Use standard commercial GIS tools for
  development
• Use data from existing information sources
  (administrative registers listed below)
  available and integrate it within the System
• Population Register
• State Address Register
• (adress data and administrative
  boundaries map)
• Real estate state cadastre information system
• (Building Part and Cadastral Map)
• State Maps with different scale for rural(10000)
  and urban(2000) areas

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Main requirementsfor the GIS development
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General requirements

• Multiuser system with user friendly interface
• System should be built up on the bases of GRID
  technology(definition of different cell size to
  be possible)
• System should Ensure
• Development , maintenance, upgrade of enumeration
  areas for population census as well as for the
  samples creation for social statistics needs,
• Quick recalculation of the areas on the user
  demand (in case of density changes)
• Linking one or several areas to an
  enumerator/interviewer
• Visual analysis of the enumeration/survey process

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System components functionality
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Addresses

• List of Addresses should be created and
  connected to the address points on the map
• Information from administrative sources to be
  used
• Address information from the list should appear
  by clicking to each adress point on the map
• It should contain information for the address
  points on the map (Name, personal ID, territory
  code, address code, Building ID code, status
  etc.)
• Filtering by each address field from the address
  list should be enabled

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Enumeration areas (1)

• The territory consisting from one or several grid
  cells which involves the set of addresses to be
  linked to one enumerator should be calculated
  taking into account requirements as follows
• Ensure automated grouping of the grid units thus
  making enumeration areas taking into account of
  natural obstacles like rivers, motorways,
  railways
• Administrative boundaries
• One of two exceeding of enumeration area
  limitations or population number limit,
  dependently which happens first,
• Warning message on the screen should be generated
  in case when number of people living in one
  building exceeds population number limit of the
  enumeration area

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Enumeration areas (2)

• System software should ensure both - transition
  from Vector map to Grid and vice versa
• Automatical assigning of the enumeration areas to
  particullar enumerators should be ensured taking
  into account address of the each exact enumerator
• Enumeration areas would be possible to reassign
  to other enumerator by drag and drop on the map
• Particular addresses can be taken out of one
  enumeration area and put into other area
• Particular addresses could be assigned to a
  particular enumerators no mater in which
  enumeration area the address was

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Visualisation

• Functionality of the component have to ensure
  visual presenting of information how samples made
  covers the enumeration areas. Sample coverage
  analysis is essential for social statistics
  sampling process
• Data must be viewable by using web browser thus
  not limiting number of system users to some
  desktop software
• By taking collection statuses from data
  enumerators fieldwork systems the System should
  show them on the map

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Data export

• Functionality of the component have to ensure
  export of the results enumerators linked to
  enumeration areas, addresses and people, with
  defined data structure as
• Tab delimited
• Text qualifier
• Columns in formats csv or mdb

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Work with maps

• System have to ensure automatic preparation of
  maps containing information for each of
  enumerators address points on the map, address
  details by clicking on the point.
• Zooming possibilities
• Maps should be saved as PDF files
• Maps should be printable from the screens
• Enumerator/interviewer have to be able add the
  current status of interview for each address on
  the map(new,disrupted, completed, ...)
• To have a possibility to add or dellete
  informative layers on the map

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System Platform

• Intergraph Geomedia
• Microsoft SQL server 2005

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THANK YOU FOR ATTENTION!

• Karlis Zeila - Vice President, CSB of Latvia
• Karlis.Zeila_at_csb.gov.lv
• Signe Rudzite Deputy Director, Department of
  Cadastre and Registers, SLS of
  Latvia
• Signe.Rudzite_at_vzd.gov.lv