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

0 | 2017-06-19 14:19:09.100765 | 273 | 0.562380498578 | WKT | GeoJSON | poly | image |

0.004000-0.001000-0.001000 | 2017-06-19 15:34:25.277187 | 171 | 0.571056039282 | 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))