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HS Gridder for MapInfo
by Portolan Technology
is a MapBasic tool to assist with the spatial and temporal analysis
of crime locations within MapInfo Professional.
HS Gridder uses kernel density methods to identify and map crime
hotspots (clustering). HS Gridder first applies a Nearest Neighbour
Index (NNI) analysis to the data, to test for statistical significance.
If clustering is detected, analysis is completed on the data. The
output is provided in a MapInfo grid file (.mig), which is typically
a very small file size, and can be made to appear translucent in
the map window.
HS Gridder also performs temporal analysis on crime data, counting
records by day of week, hour of day, or a combination of these.
HS Gridder uses the aoristic method when analysing times, so that
'From' and 'To' times are considered. Output is provided in graphs/charts.
HS Gridder - The Solution
The HS Gridder tool
enables the quick and easy production of hotspot mapping. Originally
developed for the Victoria Police Force in Australia, the software
has since been deployed to other Police Forces including Surrey
Police in the UK. The tool was designed to be 'police proof' and
adopts the 'big button' approach to very quickly generate a hotspot
map in seconds
Version 2.0 offers settings and preferences to be made, larger
datasets to be processed and the ability to automate HS Gridder
via MapBasic and a settings file.
Users are able to select an entire table or a sub-selection
of point data to perform a hotspot analysis. Prompts are given to
save the resultant MapInfo Grid (mig) file, followed by the option
of Simple or Advanced settings. Most users will opt for the default
values presented but the Advanced settings allow for further options
to produce Full Surface maps, Smoothed or Raw Values, Equal Interval
or Incremental Mean Ranges.
The time and date of an offence are likely to be relevant to most
crime and disorder analysis. It is important to look at when an
offence or cluster of offences takes place. HS Gridder offers the
Day of Week - Chart of the Count of records based on the
day of week they occurred.
Hour of Day - Chart of the Count of records based on the hour
of day they occurred.
Day + Hour - Chart of the Count of records based on which
hour in which weekday they occurred.
HS Gridder costs £325.00 + VAT for a single user with options
The upgrade cost from v1.5 is £150.00 + VAT for a single
Minimum System Requirements
1.4 GHz or faster processor
Windows 2000/XP operating system
MapInfo Professional version 9 or higher
CDR Group is pleased to be working within a partnership
agreement with Portolan Technology to offer this software and related
support services. Additionally, CDR offers a consultancy service
to assist clients in achieving the best results from their data.
For further information, please contact John Ievers
at CDR Group on 01433 621282.
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