turf - npm Package Compare versions

Comparing version 0.0.88 to 0.0.89

lib/buffer.js

 //http://stackoverflow.com/questions/839899/how-do-i-calculate-a-point-on-a-circles-circumference
 //radians = degrees * (pi/180)
 
-var _ = require('lodash')
+// https://github.com/bjornharrtell/jsts/blob/master/examples/buffer.html
 
-module.exports = function(point, radius, units, done){
-  var geometry = point.geometry
-  var type = geometry.type
-  var polygon = {
-    "type": "Feature",
-    "geometry": {
-      "type": "Polygon",
-      "coordinates": []
-    }
-  }
+var _ = require('lodash'),
+    jsts = require('jsts')
+var t = {}
+t.featurecollection = require('./featurecollection')
+t.polygon = require('./polygon')
 
+module.exports = function(feature, radius, units, union, done){
   switch(units){
@@ -27,24 +23,11 @@ case 'miles':
   }
+  
+  var reader = new jsts.io.GeoJSONReader()
+  var geom = reader.read(JSON.stringify(feature.geometry))
+  var buffered = geom.buffer(radius);
+  var parser = new jsts.io.GeoJSONParser()
+  buffered = parser.write(buffered)
 
-  switch(type){
-      case 'Point':
-        var coordinates = []
-        var x = geometry.coordinates[0]
-        var y = geometry.coordinates[1]
-        var range = _.range(-180, 180, 1)
-        for(var i in _.range(0, 360)){
-          var xC = x + radius * Math.cos(range[i] * (Math.PI / 180))
-          var yC = y + radius * Math.sin(range[i] * (Math.PI / 180))
-          coordinates.push([xC, yC])
-        }
-        polygon.geometry.coordinates = [coordinates]
-        done(null, polygon)
-        break
-      case 'LineString':
-        done(new Error('LineString not implemented'))
-        break
-      case 'Polygon':
-        done(new Error('Polygon not implemented'))
-        break
-    }
+  buffered = t.featurecollection([t.polygon(buffered.coordinates)])
+  done(null, buffered)
 }

lib/polygon.js

@@ -11,3 +11,6 @@ module.exports = function(coordinates, properties){
   }
-  
+  if(!polygon.properties){
+    polygon.properties = {}
+  }
+
   return polygon
@@ -14,0 +17,0 @@ }

package.json

 {
   "name": "turf",
-  "version": "0.0.88",
+  "version": "0.0.89",
   "description": "a node.js library for performing geospatial operations with geojson",
@@ -5,0 +5,0 @@ "main": "index.js",

README.md

@@ -417,3 +417,3 @@ turf
 
-Buffers a point feature to a given radius. Lines and Polygons support coming soon. Unit selection coming soon too (degrees, miles, km).
+Buffers a point, linestring, or polygon feature to a given radius. Units supported are miles, kilometers, and degrees.
 
@@ -420,0 +420,0 @@

test/buffer.js

@@ -1,2 +0,3 @@
-var t = require('../index'), fs = require('fs')
+var t = require('../index'), 
+    fs = require('fs')
 
@@ -6,3 +7,3 @@ describe('buffer', function(){
     t.load('../test/testIn/Point1.geojson', function(err, pt){
-      t.buffer(pt, 10, 'miles', function(err, buffered){
+      t.buffer(pt, 10, 'miles', false, function(err, buffered){
         fs.writeFileSync('./testOut/buffered.geojson',JSON.stringify(buffered))
@@ -15,5 +16,5 @@ if(err) throw err
   it('should buffer a LineString', function(done){
-    t.load('../test/testIn/Point1.geojson', function(err, pt){
-      t.buffer(pt, 10, 'miles', function(err, buffered){
-        fs.writeFileSync('./testOut/buffered.geojson',JSON.stringify(buffered))
+    t.load('../test/testIn/bezierIn.geojson', function(err, pt){
+      t.buffer(pt, 10, 'miles', false, function(err, buffered){
+        fs.writeFileSync('./testOut/bufferedLine.geojson',JSON.stringify(buffered))
         if(err) throw err
@@ -25,5 +26,5 @@ done()
   it('should buffer a Polygon', function(done){
-    t.load('../test/testIn/Point1.geojson', function(err, pt){
-      t.buffer(pt, 10, 'miles', function(err, buffered){
-        fs.writeFileSync('./testOut/buffered.geojson',JSON.stringify(buffered))
+    t.load('../test/testIn/bufferPolygonIn.geojson', function(err, pt){
+      t.buffer(pt, 10, 'miles', false, function(err, buffered){
+        fs.writeFileSync('./testOut/bufferedPolygon.geojson',JSON.stringify(buffered))
         if(err) throw err
@@ -36,3 +37,3 @@ done()
     t.load('../test/testIn/Point1.geojson', function(err, pt){
-      t.buffer(pt, 10, 'miles', function(err, buffered){
+      t.buffer(pt, 10, 'miles', false, function(err, buffered){
         fs.writeFileSync('./testOut/buffered.geojson',JSON.stringify(buffered))
@@ -46,3 +47,3 @@ if(err) throw err
     t.load('../test/testIn/Point1.geojson', function(err, pt){
-      t.buffer(pt, 10, 'miles', function(err, buffered){
+      t.buffer(pt, 10, 'miles', true, function(err, buffered){
         fs.writeFileSync('./testOut/buffered.geojson',JSON.stringify(buffered))
@@ -49,0 +50,0 @@ if(err) throw err

New alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Fixed alerts

License Policy Violation

License

This package is not allowed per your license policy. Review the package's license to ensure compliance.

Found 1 instance in 1 package

Improved metrics

Number of package files

230

increased by1.32%

Worsened metrics

Total package byte prevSize

3460651

decreased by-0.24%

Lines of code

21786

decreased by-0.13%

No dependency changes