most accurate. adding a grid latitude orientation maximum minimum significant values longitude
DESCRIPTION
Great Circles Which are great circles, latitude or longitude?TRANSCRIPT
Most accurate
Adding a grid Latitude
Orientation
Maximum
Minimum
Significant values
Longitude
Great Circles Which are great
circles, latitude or longitude?
Magnetic declination True (geographic)
North Geomagnetic
North
Mercator Pros Cons
Gnomonic Pros Cons
Conic Pros Cons
TOPOGRAPHIC MAPS
TOPOGRAPHIC MAPS
Check out your favorite topo map Topo maps
Making a cross section1) Line strip up with target cross section path2) Make small “tic” marks where each contour
line touches the edge of your paper strip.3) Label each mark with the elevation of the
matching contour line4) Number the lines on your paper starting at
the top with one number higher than the highest number on your strip and going down to one lower than your lowest number
5) Put your strip along the lines on the paper marking dots on the matching lines
6) Smoothly connect the dots
Rough approximation of method9200____________________9000____________________8800____________________8600____________________8400____________________8200____________________8000____________________7800____________________
Making a topo map from measured elevations
NOTES: 10 ft contour line is easiest, have students start with highest point then higest line is multiple of ten just below that highest number, Lines tend to be circles within circles even if they run off the page, lines separate numbers above that of the line from those below, label lines to keep track. Notice no 40 line since never go below 40 ft. Real maps tend to be made from a few measure points plus an understanding of the “lay of the land”. This process mimics that.
Topo Tales write a story as if you were taking a trip along the land portrayed on the map.
Need:1) Starting elevation2) Uphill or down3) Steepness4) Scenery5) Ending elevationBe creative but make sure your story
is consistent with the map