Term
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Definition
| The elevation of any point above mean sea level. |
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Term
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Definition
| A line that connects points of equal elevation above or below a standardized datum plane. |
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Term
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Definition
| The vertical distance represented between each contour line. |
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Term
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Definition
| Same as slope but typically used to designate the strongest of rivers or streams |
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Term
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Definition
| the angle between magnetic north and geographic (tur north) |
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Term
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Definition
| a map with area bounded by latitude and longitude lines |
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Term
| Quadrangle map are bounded by: |
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Definition
| latitude and longitudes 7,15,or 30 minutes apart. |
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Term
| Quadrangele maps distance measurements are defined as: |
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Definition
60 seconds =1 minute
60 minutes =1 degree
1 degree =1/360th of an arc of circle |
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Term
| A circle has how many degrees? |
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Definition
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Term
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Definition
| The vertical distance between two selected points on a topographic map. |
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Term
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Definition
| one square mile: a subdivision of a township. |
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Term
| one swuare mile equals how many acres? |
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Definition
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Term
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Definition
| a vertical change in elevation per unti of horizontal distance. Usually given in feet per mile. |
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Term
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Definition
| measurement of a thirty-six square mile area that is used in the Congressional Land Survey System. |
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Term
| Where is the map's name found? |
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Definition
| upper left and lower right corners |
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Term
| What are the three types of scales that can be found on the map? |
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Definition
| bar scale, representative and verbal |
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Term
| Where is the scale found on the map? |
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Definition
| bottom center margin of the map |
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Term
| Where is the contour interval found? |
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Definition
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Term
| Where is magnetic declination found? |
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Definition
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Term
| Twelve rules of contour lines |
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Definition
1. Contour lines always close
2. Contour lines never cross except on
overhanging cliffs.
3. Contour lines never meet other contour
lines.
4. Lines are further apart on gentle
slopes than on steep slopes.
5. lines "V" upstream
6. Depressions that lack sharp outlines
require continuous lines with short
hachures pointing down slope.
7. When first going upslope and then
into a depression, the first hachured
line is the same as the highest
elevation crossed.
8. the first line crossed after direction
change has the same elevation as the
one crossed before the change.
9. elevations of special points on the
map are printed symbols.
10.every fifth lineis printed more
heavily than the others to allow
elevation number to be printed.
11. Any selected point on a map is a
contour line.
12. Each contour or topographic map has a
CI printed at the bottom of map. |
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Term
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Definition
Gradient = change in field value divided by
distance. |
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