Opening Layers¶
Layers display geographic information on a map. The layers are displayed in different formats, shapes or icons such as images, text, tiles, etc. Layers control the way a user sees different classes of information.
Basemap and open weather layers are built dynamically based on what's available through the map service provider. In the lower right corner of the grid, there are active links provided with information about map data and Esri services.
Other layers in the application are used to monitor, track and provide visualization on what's happening around the city. It also provides information about the area where the layer overlays.
To apply a layer on the map, hover over the layer icon on the grid; a list of layer categories will appear, select a layer category type which will collapse and expose all category types.
Available Layers¶
Each layer has a different significance and level of importance to specific departments. Each section collapsed has a list of available layers that relates to its category.
- Base Layers - Displays different views that can be applied on a map.
- Streets
- Black and White
- Aerial
- Transportation Layer - Provides layers based on city transportation.
- Railroads
- Streets
- Metra Stations
- Metra Lines
- CTA Stations
- CTA Lines
- Bicycle Racks
- Bicycle Routes
- Pedway
- Numbered Poles
- O'hare Taxiways
- ORD CAD
- Facilities - Displays city services that are provided to the public throughout the city.
- Parcels
- City Parcels
- Police Stations
- Hospitals
- Fire Station
- Post Office
- Ward Office
- Schools
- Technology sites
- Day Care Center
- Recycling Drop-off Sites
- Libraries
- CDPH Health Centers
- Colleges
- Human Services Centers
- Senior Centers
- Park Land
- CDOT Dumps
- CDOT Kronos
- CDOT Plants
- CDOT Yards
- S&S Dumpsites
- S&S Parking
- S&S RWIS Sensors
- DSS Lots
- CDWM Dump Sites
- Airports
- DGS Facilities
- Fleet Car Washes
- Fleet Fuel Sites
- Park Art
- Park Buildings
- Park Facilities
- Cemeteries
- Forest Preserve
- Chicago Cameras
- Snow
- Main Snow Routes
- S&S 4x4 Routes
- CMAT\_SNOWPLOWS
- CTA\_SNOW\_ROUTES
- Snow Districts
- Snow District Sections
- Inside Snow Route Areas
- Events - Possible event occurring throughout the city.
- Chicago Marathon
- Historic Preservation - Layers across the city.
- Chicago Historic Resource Survey
- Chicago Landmarks
- Chicago Historic Districts
- National Register of Historic Places
- Street Closures - Layer of street closures through out the city.
- StreetClosures\_P30
- StreetClosure\_Partial\_P7
- Partial Closures Today
- STREETCLOSURE\_PTODAY
- StreetClosure\_L30
- StreetClosure\_Partial\_L7
- Partial Closures Today Line
- STREETCLOSURE\_LTODAY
- Districts - Layers of public services, neighborhoods, government and other city layers.
- Police Area
- Police Beat
- Police District
- Precincts
- Wards
- Wards 2003
- IL Senate
- IL House
- US Congress
- Community Areas
- Neighborhoods
- Zipcode
- Census Blocks
- Census Tracts
- NSEW Grid
- Sections
- CDOT Electric Grid
- CDOT Asphalt Districts
- Forestry Grid
- Forestry Districts
- Graffiti Districts
- Garbage Pickup
- DSS Sanitation Districts
- DSS Sanitation Divisions
- Recycling Pick-up Schedule
- Water Districts
- Revenue Zones
- CPS Elementary School Attendance Boundary
- CPS High School Attendance Boundary
- Fire Battalions
- Fire Districts
- Zones - Layers are used for planning and development.
- TIFS
- Industrial Corridors
- Enterprise Community
- Empowerment Zone
- Enterprise Zones
- Special Service Areas
- MLC Packaged Goods Restriction
- MLC Tavern Restriction
- Vote Dry Precinct
- Central Business District
- CPS Safe Passage Route
- CPS Safe Passage
- Others - Displays miscellaneous data.
- City Boundary
- Fire Hydrants
- Open Weather Layers - Visual representation of weather data layered on a map. Weather layers include current and historical information.
- Cloud Cover
- Quantity of Precipitation
- Sea Level Pressure
- Temperature
- West Nile Virus - Layer that represents the intensity of infected mosquitoes by census tract. The layer provides displays current or historical information.
- West Nile Vector Map
- Generated Layers - Are specialized layers derived from an executed quick search or advanced search. The generated layer/s allows the executed data to behave as a layer like being removed from the grid by deselecting the dataset name.
- Data
- Heatmap
- Tilemap
Map/Base Layers¶
The layers’ icon displays multiple basemap views and open weather layers. The list is built dynamically based on what's available through the map service provider. In the lower right hand corner on the grid, there is information and active links provided about the map services. The initial launch page displays the default basemap called street view.
- Street View - Is the default view of the map that is displays in the initial launch page.
- Grayscale View - Displays the grid in black, white and gray tones.
- Aerial View - Displays the map in birds eye view.
Open Weather Maps¶
Open weather layers are weather data that includes information about the climate. Weather maps are layered on top of existing base map and available via web apps and mobile devices. Weather layers can be applied to basemap without an executed query. To add a weather layer -> expand the layers icon; click on open weather layers and select a weather type.
- Cloud Cover - Overcast by clouds covering the sky.
- Quantity of Precipitation - Responsible for depositing fresh water on the planet by rain, sleet, snow or any act of liquid forms.
- Sea Level Pressure - The level of the ocean's surface between high and low tides that measures heights and depths. Sea level changes regularly with the tides and irregularity due to wind and currents.
- Temperature - Displayed in heat matrix of degree of hotness and coldness on a map.
Retrieving Information from Layers¶
To obtain information about a layer; hover over a layer on the map within the selected area when the mouse cursor turns into a pointing hand; simply click on the layer and the information from that layer will appear on the grid.
Community Area Layer