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Illinois Oil and Gas Resources (ILOIL) Internet Map Service

The Illinois Oil and Gas Resources Web mapping project enables on-line access to the large petroleum database of over 180,000 Illinois well records. This database has been in development for many years by the Oil and Gas Section of the Illinois State Geological Survey. Traditionally, these well records have only been available during regular business hours at the Geological Records Unit in Champaign, Illinois.

Notes for Interactive Mapping

Your browser must have Frames and JavaScript enabled.
The Web interface is best viewed using Internet Explorer.
It is not possible to bookmark map views. Instead, bookmark this access page.

Instructions for accessing Illinois Oil and Gas well data, a screen shot of the Interactive Mapping Web Interface, and descriptions of the navigational tools of the Interactive Mapping Web Interface are detailed below.

Open the ILOIL Interactive Mapping Web Interface

Instructions for Accessing Illinois Oil and Gas Resources Data

Map manipulation tools are offered on the left side of the interface. currently selected tool will be outlined in red, as the "Zoom In" tool is outlined in the screen shot shown below. Data layer visibility and activation control is located on the right side of the interface. The visitor must set desired "Active" layer combinations and then implement "Refresh Map" in order to create a custom map view.

Step 1: Enlarge an appropriate area.
The "Zoom In" tool is the default tool upon launch of the Interactive Mapping Interface.
Step 2: Set to "Visible" any data layers you wish to enable.
Data layers are listed in order by geologic time period. By default, the "Oil Fields" data layer is set to "Visible." Any combination of data layers can be set to "Visible."
Step 3: Click the "Refresh Map" button.
The "Refresh Map" button is listed below all data layers and will complete alterations to the selection of "Visible" layers. Data layers "Wells", "Counties", and "Oil Fields Data" are set to "Visible" in the screen shot shown below.
Step 4: Access Data
To use the "Select Multiple" rectangle tool, first set the "Active" layer to the desired data layer by clicking the corresponding radio button. The "Wells" data layer is set as "Active" in the screen shot shown below.

screen shot

Navigational Tools of the ILOIL Interactive Mapping Web Interface
	Overview Map	Turn the Overview Map displayed in the upper left corner of the map frame on or off.
	Zoom In	Enlarge the map image by clicking on a spot or dragging a rectangle around the area of interest.
	Zoom Out	Reduce the map image by clicking on a spot or dragging a rectangle around the area of interest.
	Pan Map View	Drag the map image so that the area of interest is shifted within the view.
	Previous Extent	Return the map view to the previous zoom level and location.
	Zoom to Full Extent	Zoom the map view out to the the fullest extent of all data layers, in this case, the boundary of the state of Illinois.
	Select Within	Graphically select multiple records by dragging a rectangle around the area of interest. Features in the rectangle will be selected and highlighted in light blue. A table of information pertaining to the active layer will appear. The user MUST specify the "active layer" to the desired data layer county.
	Identify	Identify a selected feature. A table of information for the selective feature and within the active layer will appear.
	Measure	Click on the map to create line segments. Distance (in miles) for each line segment and the total of all segments will be displayed.
	Buffer	First, use the "Select Within" tool to select multiple records. Features in the rectangle will be selected and highlighted in light blue. Use the "Buffer" dialog box to highlight features from a specified data layer within a specified distance (in miles).
	Clear Selection	Unselect all previously selected features.
	Print Map View	The user is prompted to submit a map title. The user types and submits the title, a new window opens that contains a formatted title, map image, and legend suitable for printing. Use the browser "Print" button to print the map.
	Legend or Layers	Toggle between the layer list and the map legend. The layer list enables the user to set the active data layer and also set the display of individual data layers to be on or off. The legend is a graphical representation of the symbology of all visible map layers.