Geoid Sub-Grid Options

Before uploading to a field device, use these options to define a sub-area of a larger geoid file (sub-grid) to save upload time and field device memory. They are available in the Create Geoid Grid File dialog.


Options
Geoid file properties
Geoid	This displays the name of the geoid on which the sub-grid will be based.
File name	This displays the geoid's file name.
Suffix to append	Type text to attach to the end of the original geoid file name to identify the sub-grid.
Size (KB)coordinate	Shows the original geoid size until you draw the sub-grid. Then it shows the geoid sub-grid's size.
Sub-grid properties
First latitude First longitude	These display the coordinates of the first corner of the window you pick when drawing a sub-grid.
Second latitude Second longitude	These display the coordinates of the opposite corner of the window you pick when drawing a sub-grid.
Globe properties
Cursor latitude Cursor longitude	These display the coordinates of the current cursor location. If the cursor is not over the globe, they display the point at which the cursor left the globe.
US state borders	Uncheck this to hide state boundaries in the United States of America.
National borders	Uncheck this to hide boundaries of nations.
Major rivers	Uncheck this to hide major waterways.
Select button	Click this to activate the selection tool. Then click and drag to draw a window within the current geoid to define the opposite corners of a geoid sub-grid. Any portion of the sub-grid that you draw outside of the geoid boundary is ignored. Note: To erase a sub-grid, click anywhere off of the globe. Tip: After you window to create a sub-grid, you can click within the sub-grid to zoom in.
Pan/Move button	Click this to activate the pan tool. Then click and drag on the globe to move to different locations.
Zoom In button	Click this to zoom in to the extents of the geoid. Then click it again to zoom in by an increment (x2), or pick a point on the globe to center it and zoom in on that point.
Zoom Out button	Click this to activate the zoom out tool. Then click it again to zoom out by an increment (x2), or pick a point on the globe to center it and zoom out from that point.
Zoom to Normal button	Click this to zoom to the extents of the globe, and center the current geoid.