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This section of the toolkit helps to develop a spatial
understanding of your site and how this can be linked to identifying
potential problem
areas. As you
are likely to know your site in detail already, the aim of this
chapter
is
not
to tell
you what
you
already
know, but
instead to provide a systematic framework for surveying problems on your
site as
part of the process of spatial
analysis. The purpose of the site survey is to overcome any preconceptions
that you may have built up about the site by reviewing it afresh in a systematic
way.
Collecting your data
Things you will need:
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A map of the site
A floor plan of the building
You will be using these maps to identify locations that
are vulnerable on your site, so the level of detail you need
depends upon the types of crime that your building faces. For
example, in a hospital where most crime happens inside the building
you might need a fairly detailed floorplan with some description
of major furnishings. In a building where the majority of crimes
take place on the grounds you would need a more detailed site
map.
You may have copies of the floorplan in your record office,
otherwise consult your architect. For site maps the following sources may be useful:
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Coloured pens and pencils For marking the
locations and key issues. |
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A camera For taking photos for reference
purposes |
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A legend of symbols
As you walk the site make
notes on your plans to visualise how various conditions on
your site relate. You can add symbols to your legend to
show more issues which are appropriate to your site. |
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Download suggested legends
External Evaluation The
external evaluation is used to identify how well movement is controlled
into and out of the site as well as natural surveillance
of the site. Uncontrolled and unobserved entry or exit points may
pose crime risks.
What to look for:
Formal access points
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Can people access and leave the site from these entrances
unobserved by staff members?
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What physical control measures are in place
and are they being used?
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Is the main entrance clearly visible – can
people find their way to the main entrance?
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Can visitors to the site get into the site
from entrances other than the main entrance and do staff
members oversee these entrances?
Informal access points
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Are the fences high enough to prevent uncontrolled
access? Weldmesh to a height of 1.8 meters is recommended
minimum as suitably robust. Planning permission is required for
anything
above 1.8m. Consult your local planning authority for
advice.
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Are there any breaks in the fence or barrier?
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Are there any objects surrounding the fence
/ barrier that can people can use to get over the fence
and access the site?
Natural surveillance
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Which buildings overlook the site – are the
buildings residential or commercial properties?
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Which parts of the site cannot be overseen
by these properties?
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What routes surround the site, are there any
footpaths that run adjacent to the site?
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Is there surveillance of the site from surrounding
movement routes? (i.e. from vehicular traffic, pedestrians
or cyclists etc?)
How to walk the external site:
There are
four stages to assessing the external site. We have used examples
from Case Study A, a primary school, to illustrate
the procedure.
Stage 1: Assessing the site surroundings

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Starting at the main external entrance to
the site, walk around the EXTERNAL PERIMETER, identifying
the issues raised above.
Some specific issues to look out for on the boundary include:
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Any routes that lead to the site or close to the site
such as any alleyways or footpaths
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The land uses that are close by, including any transport
facilities (means by which people can access the site),
any attractors such as shops or off-licences as well
as land uses such as residential units.
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Any incidences of graffiti, litter, crimes or antisocial
behaviour surrounding the site.
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Stage 2: Assessing the internal
perimeter
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Starting again at the main external entrance to the site,
walk around the INTERNAL PERIMETER of the site identifying
the issues raised above.
This should include identification of issues including:
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Identify the locations and types of fences and any
breaks in the fence or other vulnerable locations on
the site again using the key provided.
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Identify any locations where illegitimate users have
accessed the site in the past or areas that are known
to be vulnerable.
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Any incidences of graffiti, litter, crimes or antisocial
behaviour on the site boundary.
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Identify for all formal access points, the field of
view – can staff members oversee the access point
and are there any blockages to view?
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Stage 3: Assessing the grounds and building
exterior
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Finally, you will need to survey the grounds themselves
and the outside of the buildings on the site to identify
the opportunity to survey spaces as well as the control of
movement around the site and into the buildings themselves.
This should identify issues including:
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The level of surveillance over grounds - use a different
colour code for: staff surveillance; surveillance from
outside the site; and areas where surveillance is restricted.
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Any buildings, structures or landscaping that will block
views
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The location of bins and furniture on the site – are
they fixed or moveable? Could someone use these to climb
onto the building or easily set fire to them?
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All building entrances with information on when they
are open and when they are in use.
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The type of access control method used on the doors
(yale locks, bolts, card access etc.)
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The locations of windows on the ground floor – and
the types of locks present
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Identify any locations where illegitimate users have
accessed the building or areas within the site where
they were known to have been. Additionally, identify
any areas that are known to be trouble spots (i.e. where
pupils have been caught smoking or vandalising property
in the past)
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Any incidences of property damage, graffiti, litter,
crimes or antisocial behaviour within the site or onto
the buildings.
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Stage 4: Combine your information

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The information you have gathered during these stages
can then be combined into a single map to highlight
where problems are concentrated. The output of the site
survey of Case Study A is
shown here with all the information overlaid on a single
map. Some of the main issues around the site are
outlined below.
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The main entrance gate to the school is not aligned with
the entrance. This means that visitors to the school can
stray into the grounds without having seen the reception,
and those
entering the premises are not be seen by staff. |
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Litter is strewn on the footpath past the playing fields.
This is a sign of anti-social behaviour. |
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There are many breaks in the fence beside the playing
fields, allowing both pupils and other intruders out of school
hours informal access to the site. |
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There are
several areas with very restricted visibility around the
site |
top of page Interior Evaluation The interior evaluation is used to identify how people
move around the building interior and how well the layout supports
or hinders
the control of movement and natural surveillance. What to look for:
Access and Movement
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Where
are the public areas?
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Where
are the private areas?
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How
do people access private areas?
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Are
these locations controlled through access control measures?
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Are
these areas overseen by staff?
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Are
there any attractions and where are these located (such
as vending machines, computing equipment)?
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Are
these attractions accessible from public areas?
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Are these attractions overseen?
Natural surveillance
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Which
areas are overseen by staff?
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Which
areas can be overheard by staff?
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Are
these areas surveyed constantly , or less regularly?
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Which
other areas are staff present?
top of page
How to walk the building interior
There are four main stages to assessing the internal site. We
have used examples from examples
from Case Study C, a hospital
A&E department, to illustrate each stage.
Start at the main entrance to the building then walk through
all parts of the building that you are evaluating both looking
at circulation routes as well as the individual teaching
or clinical rooms.
Stage 1: Assessing area uses
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Mark on your map treatment/teaching rooms, and
staff bases. You should also identify locations of any goods
or equipment that may be attractive to vandalism or theft
such as vending machines, computers, staff lockers etc. |
Stage 2: Assessing
access routes
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Identify all the access control measures in place within
the building and identify at what time these are in place
and the type of measure in place (card access, key access
etc.)
Identify where doors are propped open – where will
access control not work?
Enter the building from the main entrance – identify
the routes available to you and identify what wayfinding
support is provided – can you see a reception desk & staff,
is there clear signage to tell you where to go?
Enter the building from the other entrances – again
identify the routes that are available to you and identify
what level of control is provided? Can you access the building
freely? Is there any signage or wayfinding support provided?
Can you see or access reception or other staff members easily?
What other rooms can you access without being overseen by
staff members?
Are there any locations where you see people getting lost or where they are
in a place that they shouldn't be?
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Stage 3: Assessing surveillance
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Mark on the map which circulation areas can be easily
and regularly overseen from staff-manned locations such
as the reception area. You should also identify:
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Incidents of vandalism, graffiti or litter.
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Areas where concern has been raised by staff members
or other building users.
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Stage 4: Combine your information

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The information you have gathered during these stages
can then be combined into a single map which will enable
you to see where problems are likely to occur. The interior
evaluation map of Case Study C is shown
here with all
the
information
overlaid on a single map. Some of the main issues are outlined
below. |
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The main entrance is less visible than the paramedic entrance,
a situation which is not helped by the lack of clear signage.
Additionally the view to the main entrance is further blocked
if one or more ambulances stand in front of the paramedic entrance |
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The paramedic entrance is more clearly visible on approach
to the hospital. With the lack of access control measures,
there is heavy use of this entrance by staff and the public. |
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Staff surveillance: there are several important areas
which cannot be overseen by staff which were highlighted
by walking the
building
interior.
These include the paramedic entrance, key clinical areas
such as resus, public telephones and the vending machines.
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There are also several important wayfinding
points without signage which could result in visitors becoming
disorientated and more anxious. There is no access control
at the paramedic entrance resulting in staff and patients
frequently entering this area and thus losing their way.
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top of page Checklist
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Have you:
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Assessed the boundary of your site?
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Assessed the building interior?
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Created two separate maps clearly identifying the issues
you found?
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Marked each plan with the date of the survey and details
of the person who undertook the survey?
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View a document
containing all the checklists from this toolkit (PDF 310kB)
Click here for a text-only version of the checklist
Available Downloads
Download
guidelines to walking the exterior site (PDF 518 kb)
Download
guidelines to walking the interior site (PDF 2.9Mb
- contains large images)
Achievements from this step
The output of the site survey is a map or plan showing issues
that you have recorded. The map should provide more information
on the vulnerabilities of your site both internally and externally.
It would be useful at this stage to ensure that all plans are signed
and dated to ensure that a full log can be created to ensure any
changes to the building or crime occurrences can be added to the
maps that you create. By walking the site, you
should now have a very clear overview of how the site works as
a whole.
To support this further, the next stage is to undertake a desktop
assessment of the level of natural and artificial surveillance
that the site and building support, which when combined with the
data you have just collected will begin to highlight problem areas
and inform the strategies to improve them.
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