Contour Lines ( Isolines ) and Imaginary line in the map
What is Contour Lines (Isolines) ?
Isolines, also referred to as contour lines. The prefix ‘iso’ is a greek word meaning equal, so an isoline must be a line joining equal points.
A contour line or Isolines are imaginary lines that connect points of equal elevation (elevation refers to height in feet, or meters, above sea level). Contour lines, isolines, or isograms are used widely in different fields such as meteorology, geology, oceanography, and other sciences to represent lines with equal values of a certain attribute.
The following are general characteristics of contour lines:
- Contour lines do not cross each other, divide or split.
- Closely spaced contour lines represent steep slopes, conversely, contour lines that are spaced far apart represent gentle slopes.
- Contour lines trend up valleys and form a “V” or a “U” where they cross a stream.
Here’s a list of Contour Lines / types of Imaginary line in the map you might discover as you explore geography .
List of Contour Lines ( Isolines ) /Imaginary line in the map
| S.N. | Name of Contour Lines (Isolines) | Definition |
| 1 | Isabnormal | A Line connecting points of equal deviation from mean temperature |
| 2 | Isacoustic | A Line connecting points of equal acoustic quality |
| 3 | Isallobar | A Line connecting points of equal change in barometric pressure |
| 4 | Iseidomal | A Line connecting points of equal visibility of a spectacle |
| 5 | Isentropic | A Line connecting points of equal entropy |
| 6 | Isobar | A Line connecting points of same atmospheric pressure |
| 7 | Isobase | A Line connecting points of equal land upheaval |
| 8 | Isobath | A Line connecting points of equal underwater depth |
| 9 | Isobathytherm | A Line connecting points of equal temperature and depth underground |
| 10 | Isobront | A Line connecting points of simultaneous storm development |
| 11 | Isochar | A Line connecting points of similar distinguishing characteristics of plant life |
| 12 | Isochasm | A Line connecting points of equal frequency of aurorae |
| 13 | Isocheim | A Line connecting points of same average winter temperature |
| 14 | Isochlor | A Line connecting points of equal chlorine concentration |
| 15 | Isochor | A Line connecting points of varying conditions under constant volume |
| 16 | Isochrone | A Line connecting points of equal time difference or simultaneous occurrence |
| 17 | Isoclinal | A Line connecting points of same magnetic dip |
| 18 | Isocryme | A Line connecting points of equal winter temperature |
| 19 | Isodapane | A Line connecting points of equal transport costs for products from production to markets. |
| 20 | Isodose | A Line connecting points that receive equal doses of radiation |
| 21 | Isodrosotherm | A Line connecting points of equal dew point |
| 22 | Isodynamic | A Line connecting points of equal magnetic intensity |
| 23 | Isoflor | a Line connecting points of equal number of plant species |
| 24 | Isogam | A Line connecting points of equal acceleration due to gravity |
| 25 | Isogen | A Line connecting points of equal birthrates |
| 26 | Isogeotherm | A Line connecting points of equal subterranean temperature |
| 27 | Isogloss | A Line connecting points of similar regional dialect |
| 28 | Isogon | A Line connecting points of same specified angle or same wind direction |
| 29 | Isogonal | A Line connecting points of equal magnetic declination |
| 30 | Isograd | A Line connecting points of similar conditions during geological metamorphism |
| 31 | Isogram | A Line connecting points on a map having some similar feature |
| 32 | Isograph | A Line connecting points of same linguistic usage in some respect |
| 33 | Isohaline | A Line connecting points of equal salinity |
| 34 | Isohel | A Line connecting points of equal sunlight |
| 35 | Isohyet | A Line connecting points of equal rainfall |
| 36 | Isokeraunic | A Line connecting points of equal occurrence of thunderstorms |
| 37 | Isolex | A Line connecting points of same vocabulary usage |
| 38 | Isoline | A Line connecting points on a map having some similar feature |
| 39 | Isomagnetic | A Line connecting points of equal magnetic induction |
| 40 | Isometric | A Line connecting points of equal variations of pressure |
| 41 | Isomorph | A Line connecting points of same linguistic morphological forms |
| 42 | A sonephelic | A Line connecting points of equal cloud cover |
| 43 | Isopach | A Line connecting points of equal thickness of geological strata |
| 44 | Isophene | A Line connecting points of the same phenotype or seasonal variation |
| 45 | Isophote | A Line connecting points of equal light intensity from a given source |
| 46 | Isopiestic | A Line connecting points of equal pressure but varying temperature and volume |
| 47 | Isopiptesis | A Line connecting points of same arrival date of migratory species |
| 48 | Isopleth | A Line connecting points of equal aspect of climate |
| 49 | Isopor | A Line connecting points of equal annual change in magnetic field |
| 50 | Isopycnic | A Line connecting points of equal density |
| 51 | Isorithm | A Line connecting points of equal population density |
| 52 | Isoseismal | A Line connecting points of same earthquake intensity |
| 53 | Isostere | A Line connecting points of equal specific volume of a substance |
| 54 | Isotac | A Line joining points where the ice melts at the same time of year |
| 55 | Isotach | A Line connecting points of the same wind speed |
| 56 | Isothere | A Line connecting points of equal summer temperature |
| 57 | Isotherm | A Line connecting points of equal temperature |
| 58 | Isothermobath | A Line connecting points of equal temperature at a given ocean depth |
| 59 | Isotherombrose | A Line connecting points of equal ratio of summer rainfall to annual rainfall |
| 60 | Isovol | A Line connecting points of equal ratio of fixed to volatile carbon in coal |