params ▾ | timestamp | NPoints | Length | WKT | GeoJSON | poly | Image |
---|---|---|---|---|---|---|---|

0 | 2017-10-23 20:55:19.974892 | 311 | 0.580396560154 | WKT | GeoJSON | poly | image |

0.004000-0.001000-0.001000 | 2017-11-11 10:45:51.439621 | 103 | 0.588646753155 | WKT | GeoJSON | poly | image |

X, Y, Z are parameters for the following postgis equation. The default values are chosen according to the size of the original geometry to give a slighty bigger geometry, without too many nodes.

Note that:- X > 0 will give a polygon bigger than the original geometry, and guaranteed to contain it.
- X = 0 will give a polygon similar to the original geometry.
- X < 0 will give a polygon smaller than the original geometry, and guaranteed to be smaller.

ST_Simplify(ST_SnapToGrid(ST_Buffer(geom, X), Y), Z))