Click here to see the SAS code.
Click here to see the example.


In order to annotate markers at the desired location on a map,
you have to start with an unprojected long/lat map, so that you can
line up your annotated red markers in the right positions, and also
the annotated long/lat gridlines.  You then project everything as
one combined dataset, and separate the map from the annotate after
you've done the gprojection.  

The hardest part about this map was finding the long/lat locations
of all the ice-core drilling.  I had to do much web-searching, and
many times it only turned up the name of a mountain range or glacier.
Sometimes I could only get a general long/lat location (but that is
"close enough" for this world-level map).

The marker I used is a special character 'e1'x of the "webdings"
font - this is a thermometer.  I thought it kinda looks like a
drill-bit going down into a hole, which makes a nice mnemonic
representation of ice-core drilling.

When you click on the markers, it does a "drilldown" to a google
search on that ice-core drilling project.
Note that when you're showing the entire world (which is a globe)
on a flat page, the extreme north & south areas get "spread out"
(that's why antarctica and greenland are so big-looking).

Note that this is not an exhaustive list of all the ice-core 
drilling sites - just all that I could find in a few hours of
looking on the internet.

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