Question: How Do You Label Contour Lines?

What is every fifth contour line called?

To make topographic maps easier to read, every fifth contour line is an index contour.

The index contour lines are the only ones labeled.

The index contours are a darker or wider line in comparison to the regular contour lines.

Elevations are marked on the index contour lines only..

What 2 types of lines show elevation differences?

Contour lines are used to show elevation on a topographic map. Lines or isolines on a map that connect points with the same elevation. What does each contour line on a map show? Each contour line shows a different elevation.

What do the numbers on contour lines mean?

The numbers on contour lines are always displayed in ascending height, so if the numbers increase it denotes an uphill slope, and if they decrease it’s a downhill slope.

What is the space between contour lines called?

The space between the contour lines is called the contour interval and represents a specific (set) distance. If the contour interval is 50 feet, the vertical space between the two contour lines is 50 feet.

What is the difference between two contour lines?

The elevation difference between two adjacent contour lines is called the contour interval (CI). Usually the contour interval is noted on the map legend. In most topographic maps every 5th contour line is drawn in bold print or wider than other contours. Such lines are called index contour lines.

Why can’t contour lines cross?

Contour lines can never cross one another. Each line represents a separate elevation, and you can’t have two different elevations at the same point. … Moving from one contour line to another always indicates a change in elevation.

What is maplex label engine?

The Maplex Label Engine lets you control how labels should be placed relative to features, how labels can be modified or reduced to allow more label placement when the available space is constrained, and how conflicts between labels are resolved.

What is meant by contour interval?

A contour interval is the vertical distance or difference in elevation between contour lines. Index contours are bold or thicker lines that appear at every fifth contour line. If the numbers associated with specific contour lines are increasing, the elevation of the terrain is also increasing.

How do you mark a contour line?

Put simply, contour lines mark points of equal elevation on a map. If you trace the length of a line with your finger, each point you touch is the same height above sea level. If you were to walk the path of a contour line in real life, you would remain at the same elevation the whole hike, never traveling up or down.

How do we use contour lines?

Contour lines are lines drawn on a map connecting points of equal elevation, meaning if you physically followed a contour line, elevation would remain constant. Contour lines show elevation and the shape of the terrain. They’re useful because they illustrate the shape of the land surface — its topography — on the map.

What are the characteristics of contour lines?

Characteristics of ContoursMust close on themselves, on or off the map.Perpendicular to the direction of max. … Slope between them is assumed uniform.The distance between them indicates the steepness of the slope, gentle or steep.Irregular signify rough, smooth signify gradual slopes.Concentric closed contours: hills or depression.More items…

How do I label contour lines in Arcgis?

Labeling using the Contour Placement styleEnable the Maplex Label Engine.Click the Label Manager button. … Check the check box next to the layer you want to label.Choose a label class under the layer.Click the Properties button.Click the Label Position tab.Choose Contour Placement from the line label placement style drop-down list.More items…

What are the 5 Rules of contour lines?

Rule 1 – every point of a contour line has the same elevation. Rule 2 – contour lines separate uphill from downhill. Rule 3 – contour lines do not touch or cross each other except at a cliff. Rule 4 – every 5th contour line is darker in color.

How do you label contour lines on a topographic map?

A map with contour lines on it is called a topographic map. To add single contour labels click annotate tab labels tables panel add labels menu surface contour single. The change in elevation from one contour line to the next is always the same within the same mapmany maps have either a 40 or 80 foot contour interval.