Show Bounding Box: This property is set to True by default to display a bounding box along the edge of the grid.Set it to False to hide the intersections. Show Intersections: This property is set to True by default to display crosshairs at grid line intersections.Set it to False to hide the inner grid lines. Show Grid Lines: This property is set to True by default to display the inner grid lines.Y Spacing: The spacing of grid lines in the Y-direction, in the units of the current coordinate system.X Spacing: The spacing of grid lines in the X-direction, in the units of the current coordinate system (for example, in meters for a UTM projection).Refer to the Select Coordinate Systems topic for further instructions. To change to a different coordinate system, click the white space in the Coordinate System field. Coordinate System: The coordinate system associated with the grid lines.Update the following properties as needed. Properties of a grid line layer are displayed beneath the Toolbox in the lower-right corner of the ENVI application. The following figure shows an example of displaying State Plane coordinates (yellow) along with Geographic WGS-84 latitude and longitude coordinates (pink): A new Grid layer for that projection is added to the Layer Manager. After choosing a new projection and clicking OK, the new grid lines will overlay the original grid lines. Click the Annotations drop-down list and select Grid Lines again to display the Select Coordinate System dialog. You can also add multiple sets of grid lines, each in a different coordinate system. To remove grid lines from the view, right-click on the Grid layer in the Layer Manager and select Remove. The grid line properties are displayed below the ENVI Toolbox. The Layer Manager lists a new Grid layer. Coordinate labels also display along the edge of the grid in the default units of the coordinate system. Or, right-click on a View layer in the Layer Manager and select New > Grid Lines Layer.Ī default set of grid lines displays in the view. Note: You can also select File > New > Grid Lines Layer from the menu bar. Once a view contains a base projection from displaying a raster, vector, or other projected layer, click the Annotations drop-down list in the ENVI toolbar and select Grid Lines. You can also write a script to overlay grid lines using the ENVIView::CreateGridLinesLayer method and the ENVIGridLinesLayer routine. This topic describes how to work with grid lines. If a view contains a standard, RPC, or pseudo spatial reference, you can overlay grid lines in that view.

Grid overlay image