I am currently testing some functionalities in my app, of which one is to check if an object is a valid GeoJSON. I'm using @mapbox/geojsonhint for this.
import { hint } from '@mapbox/geojsonhint';
import { randomPolygon } from '@turf/random';
const feature = randomPolygon(1).features[0];
function isValidGeoJSON(geojson: any): { valid: boolean; errors: any[] } {
const errors = hint(geojson);
return {
errors,
valid: errors.length === 0
};
}
isValidGeoJSON(feature);To test this function I generate random polygons with @turf/random. The problem is that all polygons randomly generated by the randomPolygon function fail due to the right-hand rule.
The RFC 7946 states here:
A linear ring MUST follow the right-hand rule with respect to the area it bounds, i.e., exterior rings are counterclockwise, and holes are clockwise.
@mapbox/geojsonhint is not the only one complaining about this, tools like geojson.io and geojsonlint also throw the same error.
I'm using @turf/random v6.5.0.
Random feature generated by randomPolygon:
{
"type": "Feature",
"properties": {},
"geometry": {
"type": "Polygon",
"coordinates": [
[
[
-158.66509293153055,
-73.08040644678542
],
[
-158.97038620807854,
-74.68046996596513
],
[
-153.1212960672334,
-72.72257839813791
],
[
-155.32806726918324,
-76.44993243660309
],
[
-159.07024019343282,
-75.21488784692389
],
[
-159.01662503629552,
-78.17553374285981
],
[
-160.06913205531168,
-75.78662828914291
],
[
-167.94347021160297,
-79.55249722610885
],
[
-163.71367843734242,
-73.78563223508077
],
[
-164.07509676069895,
-67.48211236028651
],
[
-158.66509293153055,
-73.08040644678542
]
]
]
}
}
To reproduce generate a new feature using the randomPolygon function from @turf/random or copy the example above and paste it into geojson.io or geojsonlint.
I am currently testing some functionalities in my app, of which one is to check if an object is a valid GeoJSON. I'm using @mapbox/geojsonhint for this.
To test this function I generate random polygons with
@turf/random. The problem is that all polygons randomly generated by therandomPolygonfunction fail due to the right-hand rule.The RFC 7946 states here:
@mapbox/geojsonhint is not the only one complaining about this, tools like geojson.io and geojsonlint also throw the same error.
I'm using @turf/random v6.5.0.
Random feature generated by
randomPolygon:To reproduce generate a new feature using the
randomPolygonfunction from@turf/randomor copy the example above and paste it into geojson.io or geojsonlint.