VERTCON for Google Earth (VERGE)
This page describes a free application that runs in
Google Earth version 5.0 or later. Please install
Google Earth,
download
VERGE,
and return to this page to learn more.
VERGE is a graphical front end for the NGS online tool, VERTCON.
It eliminates the need to input geodetic coordinates and displays the converted
height and datum shift in a placemark balloon.
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Position the point of interest (POI) in the center of the view. One way to
do this is to double-click an unmarked location. To precisely position the
POI in the center of the view, add a placemark at the desired location;
then edit the properties of that placemark and reset the view.
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Check the box beside the Orthoheight Conversion network link.
A form will be presented with read-only coordinates corresponding to
the view center and input fields for height and datum. Converted height
and datum shift are displayed when the Convert button is pressed.
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On subsequent uses, reposition the POI and ensure that the network link
is checked and selected. Then choose Refresh from the Edit menu, or right-click
and select Refresh in the context menu.
Image NGS
Coverage is limited to the conterminous United States. Check the Extents polygon to
display the coverage area bounding box.
Note: To save VERGE results from one Google Earth session to another, right-click
on Saved Placemarks and select Copy; then right-click on My Places and
select Paste.
All data are retrieved from remote servers. Data errors,
accuracy, and availability are beyond the control of this application.
VERGE is a component of Earth Survey
© 2007-2010
Metzger & Willard, Inc.
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