Gittr (from Gitter /ˈɡɪtɐ/, the german word for grid) cuts an input polygon into equal sized grid cells. Grid cells are only created if they either touch or are within the input polygon. It also accounts for polygon holes.
go get -u github.com/iwpnd/gittr
package main
import (
"encoding/json"
"fmt"
"github.com/iwpnd/gittr"
)
func main() {
raw := []byte(`{
"type": "Feature",
"properties": {"id": 3},
"geometry": {
"type": "Polygon",
"coordinates": [
[
[13.398424, 52.481369],
[13.395336, 52.480271],
[13.391905, 52.478598],
[13.390017, 52.478076],
[13.3871, 52.477971],
[13.386929, 52.471384],
[13.389503, 52.470338],
[13.392076, 52.46924],
[13.397395, 52.466626],
[13.402971, 52.465527],
[13.40992, 52.465789],
[13.417384, 52.469867],
[13.420558, 52.470338],
[13.419185, 52.473946],
[13.418499, 52.477501],
[13.418756, 52.479592],
[13.413781, 52.48048],
[13.406489, 52.482153],
[13.401856, 52.482728],
[13.398424, 52.481369]
],
[
[13.391561, 52.475096],
[13.414552, 52.476194],
[13.415324, 52.47107],
[13.391647, 52.470756],
[13.391561, 52.475096]
]
]
}
}`)
var f gittr.Feature
err := json.Unmarshal(raw, &f)
if err != nil {
panic("something went wrong")
}
// create grid with a cell size of 100m
grid, err := f.ToGrid(100)
if err != nil {
panic(err)
}
fmt.Printf("cell count: %v\n", len(grid.Features))
}MIT
Benjamin Ramser - @iwpnd
Project Link: https://github.com/iwpnd/gittr
Paul Mach - go.geojson