Addressing System for Africa: GIS as a Tool for City Management Iris Knabe UNHABITAT

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Addressing System for Africa GIS as a Tool
for City Management Iris KnabeUN-HABITAT
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Addressing System for Africa GIS (Geographical
Information System) as a Tool for City
Management

• Addressing System for African Towns how do they
  look like?
• Country Experience Kenya Introducing GIS as a
  tool for town
• planning
• Country Experience Lessons Learned
• UN-Habitat 1000 Cities GIS Programme

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Addressing System for Africa GIS as a Tool for
City Management

• Addressing System for African Towns how do they
  look like?
• African Towns look very different
• in different countries and
• within one country and within one town

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Addressing System for Africa GIS as a Tool for
City Management
Addressing System for African Towns how do
they look like?
Nairobi Planned area Unplanned area
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Addressing System for Africa GIS as a Tool for
City Management
Addressing System for African Towns how do
they look like?
Planned area with roads and square plots
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Addressing System for Africa GIS as a Tool for
City Management
Addressing System for African Towns how do
they look like?
Unplanned area without roads
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Addressing System for Africa GIS as a Tool for
City Management
Addressing System for African Towns how do
they look like?
Well planned housing
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Addressing System for Africa GIS as a Tool for
City Management
Addressing System for African Towns how do
they look like?
Mixture of different structures within one town
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Addressing System for Africa GIS as a Tool for
City Management
Addressing System for African Towns how do
they look like?
How do we plan roads and an addressing system?
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Addressing System for Africa GIS as a Tool for
City Management
2. Country Experience Kenya Introducing GIS
as a tool for town planning
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Country Experience Kenya Introducing GIS as a
tool for town planning

• Town Planning in Naivasha
• An up-to-date map of the town area was missing.
• How to plan roads, water pipes, drainage, land
  use
• without a basic map?
• Producing an accurate digital map using
• an aerial photo.

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Country Experience Kenya Introducing GIS as a
tool for town planning

• Town Planning in Naivasha
• Producing an accurate digital map using an
  aerial
• photo
• Base map development and classifying roads
• Introducing a numbering/coding system for plots

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Country Experience Kenya Introducing GIS as a
tool for town planning

• Town Planning in Naivasha
• First Step Digitising and Classifying the ROADS
• Highways
• Main Roads
• Roads
• Feeder Roads
• Foot Paths
• (Railroads)

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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Area
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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Road Network Railroad Highway Main
Roads Roads Feeder Roads Foot Paths
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Country Experience Kenya Introducing GIS as a
tool for town planning
How do you NAME the roads? Should ALL the roads
be named? Which kind of STREET ADDRESSING
system?
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Country Experience Kenya Introducing GIS as a
tool for town planning

• Town Planning in Naivasha
• How do you NAME the roads?
• Should ALL the roads be named?
• Which kind of STREET ADDRESSING
• system?
• a more detailed map is needed

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Country Experience Kenya Introducing GIS as a
tool for town planning

• Town Planning in Naivasha
• Dividing the town area into different BLOCKS.
• Dividing the Blocks into different SECTIONS.
• Digitising plots using the aerial photo and
  maps.
• Numbering/coding the plots according to the new
  system.
• A plot number consists of
• Block Number (01)
• Section Number (01)
• Plot Number (001)
• 0101001

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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Area, Blocks
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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Area, Blocks
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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Area, Blocks and Sections
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Country Experience Kenya Introducing GIS as a
tool for town planning

• Naivasha Town Area,
• Blocks and Sections
• Coding System
• Block 01,
• Section 01
• 0101

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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town, Digitising Plots
Coding (Block ID, Zone ID, Plot ID) 01 02 479
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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town (Final Output) Blocks, Sections
and Plots
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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Different Sections within a Block
with numbered Plots
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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Plots as per development plan and
the reality with crossing feeder roads and
footpaths
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Country Experience Kenya Introducing GIS as a
tool for town planning

• Naivasha Town
• Unplanned settlements
• Houses on road reserves
• Feeder Roads
• Large plots

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Country Experience Kenya Introducing GIS as a
tool for town planning
Naivasha Town Unplanned settlements Houses on
road reserves
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Country Experience Kenya Introducing GIS as a
tool for town planning
Short term solution Security Sections
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Addressing System for Africa GIS as a Tool for
City Management
3. Country Experience Kenya Lessons Learned
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Country Experience Kenya Lessons Learned

• No addressing system without proper town planning
• Different solutions for different areas
• ? different areas can easily be
  identified on aerial or satellite images
  especially of high resolution (if the local
  knowledge is not sufficient or the town is too
  big)
• ? after identifying, the areas can be
  classified and different systems can be assigned
  to the different areas
• We need more than a simple road map
• ? we need the borders of the plots to
  address them properly
• ? we do not get the borders of the plots
  without files of land ownership, local
  knowledge, development plans or others

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Country Experience Kenya Lessons Learned

• No addressing system without proper town planning
• We need a participatory process
• We have to find a solution for problem
  cases like houses on road reserves. Do we have
  to demolish those houses? Are the planned roads
  not important for the inhabitants of those areas?
• All the described issues (which are far from
  being complete) need a process of meetings,
  surveys and town planning.
• Development plans have to be adjusted.
• Political systems and local preferences play a
  key role in developing street addressing systems,
  especially in developing countries.

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Country Experience Kenya Lessons Learned

• No addressing system without proper town planning
• By introducing a GIS, we can also easily
• identify the owners, the tenants, the number of
  people living there,
• the use of the plot (industrial, residential),
• the status of infrastructure like water supply,
  waste management,
• sanitation etc.
• . and use this information for town planning
  issues as well as for improving the status of our
  information about our towns (file management) and
  make use of this information for tax collection.

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Country Experience Kenya Lessons Learned