These are basic rules for drawing isolines:
Isolines connect points of equal value, and pass between points
with higher and
lower values.
•
• Isolines do not cross or touch other isolines.
.
Isolines do not branch or fork.
Scoring:
•
Isolines either form a closed shape within a map, or they extend to the edge of a map.
Excellent submissions (12-15 points): All required isolines are drawn with no technical errors. All isolines
are labeled. The work is clearly legible.
Good submissions (9-12 points): All required isolines are drawn, but several technical errors are present;
or, no technical errors are, present, but one required isolines is missing. All isolines are labeled. The work
is legible, but some problems with clarity may exist.
Poor submissions (0-9 points): Either multiple isolines are missing, or those present include many
technical errors. Some isolines may not be labeled. The work
has low clarity.