isogram
Definition
Noun: A line on a map or chart connecting points that have an equal value for a particular variable, such as temperature, pressure, or elevation.
Usage
An isogram is a cartographic term used to visualize the distribution of a measured quantity across a geographic area. It helps in identifying patterns, gradients, and boundaries of the variable being studied.
Examples
- Noun:
- The meteorologist drew an isogram on the weather map to connect all points with the same atmospheric pressure.
- On this topographic map, the brown lines are isograms indicating equal elevation above sea level.
Advanced Usage
- In Scientific Contexts: The term is a general one, with more specific terms used for particular variables. For instance, an of temperature is called an isotherm, and an of barometric pressure is called an isobar.
- While 'isogram' is the general term, scientists typically use specific names like isotherm or isohyet for clarity.
Variants and Related Words
- Isopleth (n): A more general term for a line on a graph or map connecting points of equal value. It is often used interchangeably with in some contexts.
- Contour line (n): A specific type of that connects points of equal elevation, commonly used on topographic maps.
- Isoline (n): Another synonym for a line joining points of equal value.
Synonyms
- Isoline
- Isopleth
- Contour line (for elevation)
Related Terms (Specific Types of Isograms)
- Isobar: A line connecting points of equal atmospheric pressure.
- Isotherm: A line connecting points of equal temperature.
- Isohyet: A line connecting points of equal rainfall.
- Isohaline: A line connecting points of equal salinity.
Noun
-
a line drawn on a map connecting points having the same numerical value of some variable
