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Edmonton Police Service

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Help with Crime Mapping

The Edmonton Police Service is committed to innovative and responsive community policing, which is why we have developed this Neighbourhood Crime Mapping tool.

Select a neighbourhood by ‘clicking’ on the city map, select a date range, and then one, some or all of eight crime groups to plot on the map.


Why can’t I find my community?
Our crime mapping application is based on crime that has occurred at the neighbourhood level. We recognized some people may not know the name of their neighbourhood, or may be more familiar with a community name, so we have built intelligence into our map so you can click anywhere on the city map and the neighbourhood name and boundaries will display.
Why are some map points shown as multiple occurrences at one location?
In order to avoid having map points overlapping each other, we have grouped any map point within 0.0005 degrees of a longitude and latitude as a multiple occurrence point. This is reflective of the description, “x number of crimes occurred ‘near’ this point.”
What kind of crime data is being reported here?
Many police agencies map their ‘calls for service’ data. In order to provide our community partners with the most timely crime data possible, the EPS is using the occurrence crime type selected by our officers on the street, when they have completed their initial investigation.
How current is the crime mapping data?

You can look at the crime types for a number of time periods: 

  • Yesterday 
  • Last 7 days 
  • Last 30 days 
  • Last 60 days and 
  • A custom date range that you select, going back 90 days.
Do the “dots” show the exact location that was reported for a crime?

No.

To protect the privacy of the citizens involved, including the victims of crime, the locations shown on the map are near but are not the exact locations that were reported to the police. The “dot” is approximately 1 block either north, south, east or west from the location that was reported.

Attempts to use the latitude and longitude coordinates to identify the street address WILL NOT give the address that was reported for the crime.

Why are some “dots” outside the neighbourhood boundaries?

The locations shown on the map have been shifted so they are near but are not the exact locations that were reported to the police. Some of these shifts will place the “dot” outside the neighbourhood boundaries.

But even though they may look like they are not in the neighbourhood, the location that was reported to the police IS in the neighbourhood.

What crime types can I map?
For the purposes of measuring performance, the Edmonton Police Service tracks eight indicators of crime: assaults, robberies, sexual assaults, homicides, break and enters, thefts from vehicle, thefts of vehicle, and thefts over $5,000.
Is this neighbourhood crime data different from what was previous posted on the EPS website?

Yes. We previously posted Uniform Crime Reporting (UCR) data, which included all violations that happened during any one occurrence. For example, if an assault occurred at the same time as a break and enter, both violations were posted.

We changed from reporting all UCR violations per occurrence to the most serious crime per occurrence to provide immediate crime information and to be consistent with the Canadian Centre for Justice Statistics which collects and published statistics for all Canadian policy agencies.

While uniform crime reporting is the most accurate data available in policing, it is not timely enough for daily reporting. In order to provide the most timely crime data possible, the EPS is using the occurrence crime type selected by our officers on the street when they have completed their initial investigation.

The occurrence crime type provides the best balance between timeliness and data reliability.

How accurate is the crime data that is displayed?

Crime mapping tools depend on linking locations to mapping coordinates. This process is called geo-coding.

In 2002, crime mapping agency geo-coding standards were reported at 85%, that is, 85% of the occurrence addresses link to related mapping coordinates. On average, the EPS data used for crime mapping has a geo-coding rate of 95.5%, which is well above the noted industry standards.

So, on average, 4.5 per cent of the addresses do not link to a mapping coordinate, so they will not be shown on the map. As an example, for the eight crime indicators that we are tracking in 2008, there were 31,000 occurrences, and 1,500 occurrences out of that total did not link to a mapping coordinate.

Are there limitations to the amount of data that can be displayed?
Yes, this application will only return a maximum of 500 points of data. In excess of that number, you will be asked to limit the date range to a smaller amount of time.