A couple of years ago I posted a method to get seamless topo
map coverage as an overlay in Google Earth. The method presented
there (topomaps.kmz) no longer works, but I've found a
replacement. Go to
<https://productforums.google.com/forum/?fromgroups#!topic/gec-dynamic-data-layers/spApcsugU4g>
and get the new file exolife.kml (_not_ the attachment at the end of
the message!). It may install itself into Google Earth automatically
if GE is open; otherwise, just click on the file once you have it,
then right click on it in Google Earth and go to Properties. Under
the Refresh tab, change View-Based Refresh to After Camera Stops,
with a time delay of 4 seconds. This speeds up loading time for
regular views since the topo maps are not constantly trying to
download when you're just moving around. Drag the topomap overlay
from Temporary Places to My Places so that you will not have to load
and configure it next time you want to use it.
This works by linking to a server of topo maps; the actual
maps are not downloaded to your computer except for the view you have
up on the screen, so it does not take up a lot of memory or storage
space. It creates an image overlay of the appropriate topo map on
top of the normal Google Earth satellite view. It works in
combination with any other image overlays you may have, like the .kml
file for a cave line plot (exportable from Compass). You can vary
the transparency of overlays from invisible to opaque using a slider,
so you can have as dark or light amount of topo info as you want, or
you can turn that layer off altogether. This doubles as a way to
have seamless topo map coverage of the entire country. Very handy!
Mark
Please reply to mmin...@caver.net
Permanent email address is mmin...@illinoisalumni.org
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