Home Map Help FAQ Trouble

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Search By

You can search for registered sex offenders using six different methods. These methods include by Address, Police Beat, School, Park, Ward, Community Area (Comm.), Name 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 offenders at a time. This is done to improve performance. If your query has over 100 results you will see a warning suggesting that you apply a filter for gender or age range, or limit the offender types.

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 offenders within the specified search distance. The search distance will be denoted by a red circle.

Beat / District

This function allows you to pick one police beat and it will locate and display the sex offenders within that beat . 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 offender display limit. Try using a Filter when viewing sex offenders at the District level.

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 sex offenders 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 sex offenders 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 sex offenders within that ward. The ward boundary will be highlighted in red. Since wards encompass such a large area it's likely that over 100 sex offenders will reside within the ward boundaries. Try using the Filter control to reduce the results. You can also zoom in closer to a part of the ward and this will likely limit the sex offenders to less than the 100 limit.

Comm. (Community Area)

This function allows you to pick one community area and it will locate and display the sex offenders within that area. The community boundary will be highlighted in red. Since community areas encompass such a large space it's likely that over 100 sex offenders will reside within the community boundaries. Try using the Filter control to reduce the results.

Name

This function allows you to use a first and last name to query the data. Partial names are permissible. An all inclusive wildcard parameter is put on the end of every name query. So, you can search for First Name: M Last Name: Jones. To remove the Name query restriction on the result set click the MapView button (see below).

Map View

This function takes away any boundary restrictions and allows you to freely pan around the map viewing sex offenders. The sex offenders 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. This button also stops the search for offenders by a particular name when using the Name search by function.

Offender Types

The sex offenders are denoted on the map by two symbols, one symbol for offenders whose victim was a minor and another for offenders whose victim was adult. The checkbox next to each type control the display of that offender type.

Offender Filter

The results of a sex offender query can be filtered using gender and age range. By default no filters are applied to the query. Using a filter can help reduce the number of results when viewing a large geographic area. The mapping application limits the number of returned records to 100 for performace reasons. If you see a warning that the total number of offenders is greater than 100, use a filter to limit the results.

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 selected columns. 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 sex offenders 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 the information. The graph is dynamic and will change automatically as the data changes because the user moved to view a new location . 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 MapView 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 sex offenders types displayed. This feature can help facilitate discussion about sex offenders 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.