Map GPS Coordinates - GPS Map Coordinates ... - Global Mapper

OVERLAY CONTROL CENTER
This section describes the Overlay Control Center dialog (pictured below). This dialog serves as the central
control center handling all currently loaded data sets (overlays).
Currently Opened Overlays
Global Mapper User's Manual
This is a list of the all currently opened overlays. You can select an overlay by clicking on its name. Multiple
overlays can be selected using the shift and control keys while clicking on overlays in the list. If the overlay is
currently hidden, it is indicated to the left of the overlay description. Double-clicking on a layer automatically
brings up its Options dialog. If you hold down the 'M' key while double-clicking the Metadata dialog for the
layer will be displayed instead.
You can right click on the list of currently opened overlays to display a list of options available to perform on
the selected overlays. Examples of available options include the following:
• Create Elevation Grid from 3D Vector Data - This allows you to create an elevation grid from part or
all of any vector features in the selected overlays that contain elevation data.
• Modify Image Position - This allows you to reposition imagery and vector data that was not correctly
positioned when loaded, including imagery that was manually rectified. See the option below if you
just want to shift an entire layer by some distance.
• Setup What Zoom Levels to Display Selected Layer(s) At - This option allows you to control what
zoom levels/scales that the selected layer(s) will display at. You can choose to have layers only
display below a certain zoom scale or between scales, or when the map is a certain percentage of the
map display size or the map resolution reaches a certain level.
• Shift Selected Layer(s) a Fixed Distance - This option provides a quick way to shift any layer some
fixed distance in any direction. When selected a dialog is presented allowing you to specify the
distance to shift the selected layers in the X and Y direction or some distance along a particular
bearing.
• Scale Layer Based on Actual Length of Selected Line - This option allows you to scale a selected
layer based on a user-specified length of a selected line feature in that layer. This is useful if you
know the actual length of a line feature in a vector layer and want to scale the layer so that the line
length is correct without caring about where on the earth the layer is placed. The line that you know
Map GPS Coordinates - GPS Map Coordinates - GPSCoordinates Map 131