Home Map Help FAQ Trouble

Mouse over the image above for tips about the controls.

Search By

You can search for crime incidents using six different methods. These methods include by Address, Police Beat, Pod, School, Park, Ward, Community Area (Comm.) and the Map View.  If you don't know your police beat, ward or community area you can use your address and the application will determine the correct selection.  The application is limited to showing only 100 crimes at a time. This is done to improve performance. If your query has over 100 results you will see a warning suggesting that you reduce the time frame, apply a filter for time of day or location, or limit the number of crime types.

Date Between

You are limited to viewing two weeks worth of data at one time. This is done to reduce server load and make sure the map is more readable. The date range works with all the search types. After selecting your search type you can keep changing the dates and clicking the Apply! button to stay on the same location but change the time span. The date drop down has the two week limit highlighted using two color shades. The first 7 days are shaded one color of blue and the second 7 days are another shade of blue. If you change the date to a day outside the currently highlighted 2 week range the application will automatically adjust the dates to reflect a new 2 week period and highlight those dates. You can search a time span shorter than two weeks.

Address

You can use either a street address or an intersection. For the best results use a complete address like 5000 W Madison St. Leaving off the street type (St) or direction (W) might cause the application to not locate the address or match an incorrect address. Sometimes new addresses might not be in the system right away, but we are constantly updating the data to insure we have the most accurate address information. For an intersection, again use the most complete information you can provide and separate the two street names using an ampersand (&). For example N Clark St & W Addison St. Do not enter any house number information when searching for and intersection. Before clicking the Go! button make sure to select your search distance. You can select  a search distance of 1/8 mile, 1/4 mile, and 1/2 mile.  This will cause the application to locate and display all the crimes within the specified search distance for specified time period. The search distance will be denoted by a red circle. If you wish to stay on the same location but change the time frame simply change the dates and click the Apply! button next to the dates.

Beat / District

This function allows you to pick one police beat and it will locate and display the crime within that beat for the selected time frame. The beat boundary will be highlighted in red. You may also select a Police District. Note that a District is a large area and you may easily reach the 100 crime display limit. Try using a Filter when viewing crime at the District level.

Pod

This function allows you to pick a police camera pod and it will locate and display the crime within 330 ft. of that pod for the selected time frame. The 330 ft. boundary will be highlighted in red. The Pods are shown by a camera icon on the map with their number labeled. Select the pod number from the drop-down to zoom to and view crime information around that pod.

School

All schools are listed together in one drop down. Select a search distance and the school name and click the Go! button to display the crime around that location. The school will be highlighted in red along with the search distance.

Park

All the parks are listed in one drop down.  Select a search distance and the park name and click the Go! button to display the crime around that location. The park will be highlighted in red along with the search distance.

Ward

This function allows you to pick one ward and it will locate and display the crime within that ward for the selected time frame. The ward boundary will be highlighted in red. Since wards encompass such a large area it's likely that over 100 crimes will have occurred within the two-week time frame. Try selecting a shorter time period or reducing the number of crime types to reduce the results. You can also zoom in closer to a select part of the ward and this will likely limit the crimes to less than the 100 limit.

Comm.

This function allows you to pick one community area and it will locate and display the crime within that area for the selected time frame. The community boundary will be highlighted in red. Since community areas encompass such a large space it's likely that over 100 crimes will have occurred within the two-week time frame. Try selecting a shorter time period or reducing the number of crime types to reduce the results.

Map View

This function takes away any boundary restrictions and allows you to freely pan around the map viewing crime. The crimes are only shown when you are zoomed in close enough on the map. Typically, you need to be zoomed in close enough to see only a few city blocks.

Filter

This function allows you restrict the results of your query by the hours of the day and location codes. You can select multiple parameters by using the CTRL on your keyboard. Use this to help reduce the results of queries for large areas like Wards, Police Districts, and Community Areas.

Crime Types

The crime incidents are grouped together by the FBI's National Incident-Based Reporting System (NIBRS).  Click on the Details button for more information regarding the categories. The checkbox next to each crime time controls whether that crime category is displayed. If the box has a check that category is displayed. The map will refresh each time you click a checkbox. To make more than one change at a time before the map refreshes, hold down the SHIFT key while clicking the checkboxes than release the SHIFT key to have the map refresh.

Index

This button allows you to quickly select the crime types that are consider more serious.

Non-Index

This button allows you to quickly select the crime types that are consider less serious.

Label

While points are displayed on the map the user can also have labels placed next to each point. The label drop-down allows for labeling by any column. Simply select the column name and the labels will appear on the map. There is a limit of 50 labels allowed for display. If there are more than 50 points displayed on the map the labels will automatically turn off. This restriction helps the map from becoming too cluttered and unreadable. Some labels will overlap because points are close together. In such cases zooming in closer is the only way to remove any overlap.

Graph

While viewing crime information you can see a simple bar graph of the information by using the graph drop down located at the bottom of the page. This can be helpful for summarizing crime. The graph is dynamic and will change automatically as the data changes either because of a new location or time period. As you mouse over the various graph values the corresponding points will be highlighted on the map by a red circle. Clicking on the graph value will create a print page with those matching points circled.

Zoom

There five zoom controls. The In tool allows you to click once on the map to zoom in or click-hold-drag a zoom box. The map will zoom into the location of the box when the mouse button is released. The Out tool works in the opposite manner allowing the user to zoom out on the map. The Pan tool allows the user slide around the map by clicking and holding down the mouse button and sliding a direction and then releasing the button. The map will refresh after the mouse button is released. The Back button acts like the back button on a web browser. It remembers the last location you were viewing and zooms back to that location when the button is pressed. The zoom bar allows you to zoom to a certain level by clicking on one of the boxes. The closer the box is to the In tool the closer it will zoom in on the map. The bottom box will zoom out to the entire City. The current zoom level will be indicated by the box colored red.

View

The View buttons control the display of some additional map layers . The buttons acts as toggles and repeatedly clicking the button will turn the layer on and off. The Wards button controls the ward map, the Comm. button controls the community area layer and the Photo button controls the display of aerial photography. The Pods button controls the display of the Police Department cameras. Pods are noted on the map by a camera icon and a pod number label. The Inset button controls the display of the inset map where the current map view is highlighted by a red square.

Tool

Draw Shape

This tool allows the user to define their own geographic restriction by drawing a shape on the map and viewing only those points that fall within the boundaries of that shape. The Draw Shape tool has 3 selection methods. Point Selection works by double-clicking the left mouse button once while over the map. Points within 660 ft. are selected. Line Selection works by single-clicking once, moving the mouse and double-clicking to complete the line. Points around the line are selected. Polygon Selection works by single clicking multiple times and ending with a double-click. This method limits the user to 10 vertices per polygon. The polygon will auto-complete after the double-click. Do NOT try to close the polygon. Click Map View button to remove drawn boundary.

Email

Map Link

Clicking this button will open a new browser window with a URL link that can be emailed or shared by various electronic means. The URL encoded within the link stores the current map parameters and will open a new map window covering the exact same area with the same crime types displayed. This feature can help facilitate discussion about crime in a particular area of the City.

Print

Clicking the Map button will open a separate window with a map suitable for printing on a portrait  8.5” x 11” page. It includes the inset map and a legend. Clicking the Table button opens a separate window with the data table and selected parameters. Both of these features require that any pop-up blockers be turned off.