Hey @Gcuencam! I would recommend requesting a route for your waypoints from the Mapbox Directions API, using the geojson flag, for simplicity (default is polyline encoding). https://www.mapbox.com/api-documentation/#retrieve-directions
then run the result against turf.length, which measures the distance of a linestring
i've done some work where I take location data, create hexbins and calculate how many points are in a bin
I worry I might run into buffer errors
so i was just wondering, should I use turfjs for this scale of data or look for something else ?
Hey all, I have a vector tile polygon source hosted in Mapbox Studio and an isochrone geojson generated using the isochrone api. I'm trying to use turf intersect to find a count of polygons within the isochrone, but getting
Unknown GeoJSON type: undefined because one of the data inputs is vector tiles. I found a question on this back in 2016, but looking for a current answer/resource that will help me learn a) whether I need to convert the vt to geojson and b) best method for doing this client side. Maybe the best answer is to just use a geojson source to begin with?
@knownasilya By geojson spec polygon without hole like this:
{ "type": "Polygon",
"coordinates": [
[ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ]
]
}
and with hole:
{ "type": "Polygon",
"coordinates": [
[ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ],
[ [100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2] ]
]
}
Attention: first array is bigest area
Check this two condition and do intersect.
{ "type": "Polygon",
"coordinates": [
[ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ]
]
}
and with hole:
{ "type": "Polygon",
"coordinates": [
[ [100.0, 0.0], [101.0, 0.0], [101.0, 1.0], [100.0, 1.0], [100.0, 0.0] ],
[ [100.2, 0.2], [100.8, 0.2], [100.8, 0.8], [100.2, 0.8], [100.2, 0.2] ]
]
}
Attention: first array is bigest area
Check this two condition and do intersect.
Hi can anyone help as to why this dissolve example is not dissolving? http://jsfiddle.net/dejz01v4/1/
i'm wondering if there is a library like this https://www.npmjs.com/package/@turf/boolean-point-in-polygon
that instead of returning a boolean it returns the matching polygon
@benboughton1 Very strange, in source code dissolve using union . . .
I'm soooo confused by versioning - Is v7 the latest? this still seems to be an issue: Turfjs/turf#1800
Anyone experience this?
from the docs, it seems to be something that's obvious and widely known
"A buffer is an area defined by the bounding region determined by a set of points at a specified maximum distance from all nodes along segments of an object."
In practice, its a polygonal boundary drawn around a geometry of any type, with all edges at least N distance from the unbuffered geometry
PostGIS has a similar feature that has more documentation here: http://www.postgis.org/docs/ST_Buffer.html
Anyone looking to help an open source project ? For the last few years, I have been empowering people to map litter. https://github.com/OpenLitterMap/openlittermap-web is now open source
I am working on a wildfire tracking app and trying to get rid of ugly sliced, self intersecting polygons. Check it out here: firewild.netlify.app