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[
[ Nuggets revisits a topic that appeared
[ two years ago. Partly this is to correct
[ some changed URLs; it also allows us to
[ announce the new "Maps" Theme Page on our
[ companion Website, http://www.cln.org.
[
*** [[[ LATITUDE AND LONGITUDE ON THE WEB ]]] ***
Teachers armed with textbooks, globes and maps do a
good job of teaching latitude and longitude in the upper
elementary grades. This Nugget suggests how the Web
can augment traditional teaching.
1. Regional Map Creation
Sites like http://www.aquarius.geomar.de/omc from
Germany accept a set of latuitudes and longitudes,
then draw a downloadable map for that region in a
variety of map projections. Fast internet connection
is recommended.
2. Four-decimal-place Accuracy
Some websites give you the latitude and longitude
of any individual building or house. There is a bit
of a learning curve, and after that, students in cities
can distinguish the co-ordinates between one house and
another, or between a school's front and back doors.
Canada (urban areas, four decmial places):
Canada (towns and rural areas, two decimal places):
United States (four to five decimal places anywhere):
3. Location-Based Activities.
Once you have exact local latitude and longitude,
other web activities are feasible. Nuggets has
mentioned these before.
Sunrise-Sunset tables for your exact location:
Satellite-spotting or identification. The International
Space Station and Iridium flares are now the brightest
objects in the night sky. This website uses your exact
latitude and longitude to predict their appearance
overhead:
4. Degree-Minute Conversions.
Some sites require degrees-minutes-seconds. Others
ask for decimal degrees. You can teach the conversion
tricks, or just have students use an online calculator
like one of these:
The websites are from government or academic
institutions, with little or no advertising.
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