|
Area from irregular
surface Reduce shape to polygon and go. |
|
|
| File to upload |
(Optional) |
Such as polygon.xlsx |
| Screen 'csv' data |
|
In 'csv' (Am or Eu) format,
ignored if a file is uploaded. |
| Computing mode |
|
Generate random polygon or read given
polygon. |
| Vertices |
|
(If Generate) N. of vertices for
random polygon. |
| minS, maxS, seed |
|
(If Generate) Sides min & max,
and seed. |
| Show values |
|
Show graph coordinates. |
Computes the area of
an irregular surface (such as a geographical map), based on defining
several border points and giving their (x, y)
coordinates.
The surface border simply becomes an irregular polygon.
An unsolved problem is to avoid star polygons
in the 'Generate' mode, in which "simple" polygons are generated
with minS = maxS (> 0).
Draws a graph with the given points. |
| References: |
Plate: Geoarea |
• Generate random 2D polygon (SaturnCloud)
• FAO, Calculating surface areas of irregular shaped fields
(Food and Agriculture
Organization), Example 5.1.
Two pentagons.txt .
• Sandhu, Sanjib,
Niraj Kumar, Bhudev Kumar,
2013, "Random Polygon Generation through Convex Layers", Procedia
Technology, 10:356–364, ISSN 2212-0173, DOI:10.1016/j.protcy.2013.12.371
• 1704-07-31: Cramer, Gabriel
(†1752-01-04, 47 yrs.). |
