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refactored with @turf/projection

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This commit is contained in:
stebogit 2017-09-06 08:54:29 -07:00
parent 6aa812f358
commit adee2d93de
4 changed files with 1552 additions and 13 deletions
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44
packages/turf-buffer/index.js
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@ -3,6 +3,10 @@ var jsts = require('jsts');
var meta = require('@turf/meta');
var center = require('@turf/center');
var helpers = require('@turf/helpers');
// var projection = require('@turf/projection');
var projection = require('./../turf-projection');
var toMercator = projection.toMercator;
var toWgs84 = projection.toWgs84;
var feature = helpers.feature;
var geomEach = meta.geomEach;
var featureEach = meta.featureEach;
@ -95,25 +99,39 @@ function buffer(geojson, radius, units, steps) {
// Project GeoJSON to Transverse Mercator projection (convert to Meters)
var distance = radiansToDistance(distanceToRadians(radius, units), 'meters');
var projection = defineProjection(geojson);
var projected = {
type: geometry.type,
coordinates: projectCoords(geometry.coordinates, projection)
};
// var projection = defineProjection(geojson);
// var projected = {
// type: geometry.type,
// coordinates: projectCoords(geometry.coordinates, projection)
// };
var mercator = toMercator(geojson);
// JSTS buffer operation
var reader1 = new jsts.io.GeoJSONReader();
var geom1 = reader1.read(mercator.geometry || mercator);
var buffered1 = geom1.buffer(distance);
var writer1 = new jsts.io.GeoJSONWriter();
buffered1 = writer1.write(buffered1);
// JSTS buffer operation
var reader = new jsts.io.GeoJSONReader();
var geom = reader.read(projected);
var buffered = geom.buffer(distance);
var writer = new jsts.io.GeoJSONWriter();
buffered = writer.write(buffered);
// var reader = new jsts.io.GeoJSONReader();
// var geom = reader.read(projected);
// var buffered = geom.buffer(distance);
// var writer = new jsts.io.GeoJSONWriter();
// buffered = writer.write(buffered);
// Detect if empty geometries
if (coordsIsNaN(buffered.coordinates)) return undefined;
// if (coordsIsNaN(buffered.coordinates)) return undefined;
if (coordsIsNaN(buffered1.coordinates)) return undefined;
// Unproject coordinates (convert to Degrees)
buffered.coordinates = unprojectCoords(buffered.coordinates, projection);
return feature(buffered, properties);
// buffered.coordinates = unprojectCoords(buffered.coordinates, projection);
var result = toWgs84(buffered1);
// result.properties = properties;
return (result.geometry) ? result : feature(result, properties);
// return feature(buffered, properties);
}
/**

1
packages/turf-buffer/package.json
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@ -45,6 +45,7 @@
"dependencies": {
"@turf/center": "^4.6.1",
"@turf/helpers": "^4.6.0",
"@turf/projection": "^4.6.0",
"@turf/meta": "^4.6.0",
"d3-geo": "^1.6.3",
"jsts": "1.3.0"

273
packages/turf-buffer/test/in/issue-#900.geojson Normal file
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@ -0,0 +1,273 @@
{
"type": "Feature",
"properties": {},
"geometry": {
"type": "LineString",
"coordinates": [
[
-86.85,
21.025
],
[
-86.53333,
22.39167
],
[
-86.45,
22.765
],
[
-86.35,
23.21
],
[
-86.15,
24.04
],
[
-85.33333,
25.34167
],
[
-85.26667,
26.03
],
[
-85.23333,
26.38333
],
[
-85.18333,
26.5
],
[
-84.78333,
27.49333
],
[
-83.41667,
28
],
[
-83.21667,
28.175
],
[
-82.63333,
28.69
],
[
-82.6,
29.43
],
[
-82.55,
30.505
],
[
-81.18333,
32.14667
],
[
-79.65,
34.23333
],
[
-79.48333,
34.54333
],
[
-78.93333,
35.56667
],
[
-78.78333,
35.87333
],
[
-78.53333,
36.15833
],
[
-78.16667,
36.565
],
[
-77.9,
36.86167
],
[
-77.31667,
37.50167
],
[
-76.83333,
37.97
],
[
-76.65,
38.1
],
[
-76.4,
38.28833
],
[
-76.01667,
38.695
],
[
-75.91667,
38.80333
],
[
-75.78333,
38.94333
],
[
-75.66667,
39.06167
],
[
-75.6,
39.13833
],
[
-75.51667,
39.23167
],
[
-74.41667,
39.81667
],
[
-73.7,
40.205
],
[
-72.31667,
40.91833
],
[
-71.56667,
41.16667
],
[
-70.01667,
41.28167
],
[
-67,
42.63333
],
[
-56.46667,
45.60333
],
[
-52,
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],
[
-50.45,
46.89
],
[
-50,
47
],
[
-42.86667,
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],
[
-40,
48
],
[
-38.03333,
48.48
],
[
-30,
50
],
[
-27.85,
50.29
],
[
-20,
51
],
[
-19.33333,
51.01167
],
[
-15,
51
],
[
-14,
51
],
[
-8.5,
51
],
[
-8.25,
51
],
[
-8,
51
],
[
-5.88333,
50.935
],
[
-3.98333,
50.84333
],
[
-2.65,
50.76
],
[
-2.51667,
50.75
],
[
-2.11667,
50.675
],
[
-1.6,
50.575
],
[
-0.93333,
50.82
],
[
-0.75,
50.855
],
[
-0.08333,
50.88667
],
[
-0.18333,
50.985
],
[
-0.18333,
51.14833
]
]
}
}

1247
packages/turf-buffer/test/out/issue-#900.geojson Normal file
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