Isobar for atmospheric pressure, isotherm for temperature, or contour for height above (below) sea level.
One of the names for a line drawn on a chart through all points of the same numerical value is a "contour line." Contour lines are commonly used in geographical maps to represent elevation levels, but they can also be employed in various types of data visualizations to indicate equal values across different dimensions.
A darker contour line that typically appears every fifth line is called an "index contour." Index contours are used on topographic maps to provide a clearer reference for elevation changes, making it easier for users to interpret the terrain. These lines are usually labeled with their elevation value, distinguishing them from the lighter contour lines that represent smaller elevation increments.
City maps, the squares or grids represent one square mile. On larger maps they can indicate townships, counties, or land parcels.
The equation x=c where c is a constant is the equation of a vertical line. It can't be a function but it is linear so the answer is no. For example, the vertical line produced by the linear equation x = 3 does not represent a function. We cannot write this equation so that y is a function of x because the only x-value is 3 and this "maps" to every real-number y.
Line attributes refer to the characteristics that define the appearance of a line in graphic design or technical drawings. These attributes typically include line type (solid, dashed, dotted), line weight (thickness), line color, and line pattern (e.g., continuous, zigzag). Each attribute plays a crucial role in conveying information and enhancing visual clarity in diagrams, maps, and illustrations. Adjusting these attributes helps differentiate between various elements or layers within a design.
the blue line represents Lakes, Streams , canal and mainly just water
Contour lines do not always need to be joined. While in topographic maps they are typically continuous and closed loops to represent elevation, in some cases they may be broken or interrupted to indicate a depression or a cliff. However, for clarity and to accurately represent the topography, contour lines are usually connected and form a continuous line.
One of the names for a line drawn on a chart through all points of the same numerical value is a "contour line." Contour lines are commonly used in geographical maps to represent elevation levels, but they can also be employed in various types of data visualizations to indicate equal values across different dimensions.
Land
A darker contour line that typically appears every fifth line is called an "index contour." Index contours are used on topographic maps to provide a clearer reference for elevation changes, making it easier for users to interpret the terrain. These lines are usually labeled with their elevation value, distinguishing them from the lighter contour lines that represent smaller elevation increments.
represent the key...
City maps, the squares or grids represent one square mile. On larger maps they can indicate townships, counties, or land parcels.
Thick black lines on maps typically represent major roads, highways, or railways. They are used to denote routes that are important for transportation and travel.
The equation x=c where c is a constant is the equation of a vertical line. It can't be a function but it is linear so the answer is no. For example, the vertical line produced by the linear equation x = 3 does not represent a function. We cannot write this equation so that y is a function of x because the only x-value is 3 and this "maps" to every real-number y.
equator
stars with circles around them represent capitals.
Globes and maps