topic: mapping fields
Post on 24-Feb-2016
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Topic: Mapping Fields
Fields –
Think of a football field
The numbers represent distance
to goal
What is the distance to the goal at this point?
What is the distance to the goal at this point?
Isoline
Isoline "iso-" means "equal."
Isoline -
Types of Isolines Isotherm – Isobars – Contour Lines –
Rules for drawing Isolines1) __2) ___Example:
•13°C
•13°C •13°C
•11°C •11°C
•11°C
3) __
•5
•2
•3
•3
•2
•1
•4
4) ___
•12°C
•11°C•12°C
•13°C•12°C
•13°C
Example:
Wrong Way
5) ___
•10°C
•9°C •9°C
•10°C•10°C
Off the diagram
•10°C
•9°C
•9°C
•9°C
•9°C
•10°C
Loop
Working with Isotherms
Campfire
Where is it the warmest?
Source Sink
Source –
Sink –
Source SinkFlows from source to sink
Heat Source (high temperatures)
Heat Sink (low temperature)
Let’s look at actual temperatures Draw Isolines at a 1°F Intervals
.90°F
.87°F.89°F
.90°F
.90°F.86°F
.88°F
.87°F
.86°F
.86°F
Let’s look at actual temperatures Draw isolines at a 2°F Intervals
.86°F
.82°F
.84°F
.86°F
.86°F .84°F
.85°F .83°F
.80°F
.81°F
Heat Source Heat Sink
Where is the heat source?
Gradient
Change in field value between two place.
Gradient = Change in Field Value Distance
Yes, take out your ESRT now and find the formula
•90°F
•85°F
•85°F
•80°F
Distance = 5m
Remember the FormulaGradient = Change in Field Value
Distance
Remember the FormulaGradient = 90-80 =
5m
Remember the FormulaGradient = 10 = 2°F/m
5m
• What is the distance from Ithaca to Elmira?
____?
Compare gradient Formula to Rate of Change Formula
FQ: What is wrong with the isolines below?
•10°C
•9°C •9°C
•10°C•10°C
•http://www.polleverywhere.com/multiple_choice_polls/LTkxMDk1NzkxMA/web
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