GEOID09 for Google Earth (GeoidGE)
This page describes a free application that runs in
Google Earth version 5.0 or later. Please install
Google Earth,
download
GeoidGE,
and return to this page to learn more.
GeoidGE is a graphical front end for the NGS online tool, GEOID09.
It eliminates the need to input geodetic coordinates and displays the converted
height and geoid separation 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 Ellipsoid Height Conversion network link.
A form will be presented with read-only coordinates corresponding to
the view center and input fields for height and type. Converted height
and geoid separation 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 includes the conterminous United States, Alaska, Hawaii, Puerto Rico,
the Virgin Islands, American Samoa, Guam, and the Northern Mariana Islands.
Check the Extents folder to display the coverage area bounding boxes.
GEOID09 does not currently support Puerto Rico or the Virgin Islands
(PR/VI). Until the 2009 modeling is completed, queries in the PR/VI area will be
directed to GEOID03.
Note: To save GeoidGE 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.
GeoidGE is a component of Earth Survey
© 2007-2010
Metzger & Willard, Inc.
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