Move polygon points based on center location?

Question

Would someone have an example using Turf moving all polygon points from one location to another based on a new center point?

For example, let’s say I have calculated a center based on where the points were originally created.

Then I need to move those points to a new location based on that calculated center.

As always any help would be great!

Anatolii Suhanov · Accepted Answer · 2018-04-22T15:10:30.267

6

You need to use transformTranslate

var poly = turf.polygon([[[0,29], [3.5,29], [2.5,32], [0,29]]]);

//calculates the centroid of the polygon
var center = turf.centroid(poly);

var from = turf.point([center.geometry.coordinates[0], center.geometry.coordinates[1]]);

var to = turf.point([4, 35]);

//finds the bearing angle between the points
var bearing = turf.rhumbBearing(from, to);

//calculates the distance between the points
var distance = turf.rhumbDistance(from, to);

//moves the polygon to the distance on the direction angle.
var translatedPoly = turf.transformTranslate(poly, distance, bearing)

edited Apr 22 '18 at 15:10

answered Apr 22 '18 at 14:24

Anatolii Suhanov

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Wow, thanks for that! Can you explain what’s happening in each line? – xspydr Apr 22 '18 at 14:35
I've fixed the code and added some comments. Please check. – Anatolii Suhanov Apr 22 '18 at 15:11
Thanks man! That’s super helpful. Will this work for lines, extents, circles and ellipsis? – xspydr Apr 22 '18 at 15:23
It should work with any geojson Feature or Geometry. – Anatolii Suhanov Apr 22 '18 at 17:10
@AnatolySukhanov If I need to get the nearest Location saved in my DataBase, I'm using turf.nearestPoint, they back just **One** Point nearby in my location, How to get all the points that are about 50 km from my place – DevAS Apr 29 '19 at 13:07

Move polygon points based on center location?

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