Topic: Mapping Fields
description
Transcript of Topic: Mapping Fields
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Topic: Mapping Fields
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Fields –
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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
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Isoline "iso-" means "equal."
Isoline -
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Types of Isolines Isotherm – Isobars – Contour Lines –
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Rules for drawing Isolines1) __2) ___Example:
•13°C
•13°C •13°C
•11°C •11°C
•11°C
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3) __
•5
•2
•3
•3
•2
•1
•4
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4) ___
•12°C
•11°C•12°C
•13°C•12°C
•13°C
Example:
Wrong Way
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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
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Working with Isotherms
Campfire
Where is it the warmest?
Source Sink
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Source –
Sink –
Source SinkFlows from source to sink
Heat Source (high temperatures)
Heat Sink (low temperature)
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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
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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?
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Gradient
Change in field value between two place.
Gradient = Change in Field Value Distance
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Yes, take out your ESRT now and find the formula
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•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
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• What is the distance from Ithaca to Elmira?
____?
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Compare gradient Formula to Rate of Change Formula
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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