Contour interpolation calculator

Calculate contour elevations and distances from first point with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use contour elevations and distances from first point to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

First point elevation (m)
100
Second point elevation (m)
110
Horizontal distance (m)
50
Contour elevation interval (m)
2
Contour elevations and distances from first point
[[100,0],[102,10],[104,20],[106,30],[108,40],[110,50]]

Try another scenario

First point elevation (m)
110.00000000000001
Second point elevation (m)
110
Horizontal distance (m)
50
Contour elevation interval (m)
2
Contour elevations and distances from first point
[[110,50]]
Calculation method

Calculation method

Contour elevations and distances from first point

For all integer multiples of interval between endpoints, distance=L(contour-z0)/(z1-z0).

Symbols and units
a
First point elevation (m)
b
Second point elevation (m)
c
Horizontal distance (m)
d
Contour elevation interval (m)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Calculation uses the entered values and stated mathematical model; quantities must use the labelled units. Supported limits: All required fields must be finite values of the exact declared type and within displayed bounds. Lists contain1–1000 finite numbers. JSON tables are numeric rectangular rows, at most100 rows and30 columns; individual tools have stricter shape/domain constraints. For all integer multiples of interval between endpoints, distance=L(contour-z0)/(z1-z0).
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