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1 | | -/** |
2 | | -Handle multiple geometries that may be found in the CPAD return |
3 | | -**/ |
4 | | -var Terraformer = require('terraformer'); |
5 | | -var WKT = require('terraformer-wkt-parser'); |
6 | | - |
7 | | -// packFeatures operates over a larger geoJsonObject and operates |
8 | | -// row by row, replacing the array of temporary WKT geometries |
9 | | -// that were inserted by the appender with a geometry collection |
10 | | -// object. This effectively creates a proper GeoJSON object |
11 | | -// During the operation the tempFeatures element is deleted and |
12 | | -// replaced by the geometries element. |
13 | | -exports.packFeatures = function (geoJsonObj) { |
14 | | - for (var row in geoJsonObj) { |
15 | | - var geoJsonRow = geoJsonObj[row] |
16 | | - // array to hold all the possible multipolygons |
17 | | - var geometries = [] |
18 | | - for (var feature in geoJsonRow.tempFeatures) { |
19 | | - // convert the WKT to GeoJSON |
20 | | - var polygon = WKT.parse(geoJsonRow.tempFeatures[feature]) |
21 | | - // push the polygon into the geometries array |
22 | | - geometries.push(polygon) |
23 | | - } |
24 | | - // create the geometry collectioh |
25 | | - var geometryCollection = new Terraformer.GeometryCollection(geometries) |
26 | | - |
27 | | - // Remove the tempFeatures row now that we're done |
28 | | - delete geoJsonRow.tempFeatures; |
29 | | - // Combine the properties with the geometryCollection we created |
30 | | - geoJsonObj[row] = Object.assign({},geoJsonRow,geometryCollection) |
31 | | - } |
32 | | - return geoJsonObj |
33 | | - |
34 | | -}, |
35 | | - |
36 | | -// Append names and geometries to a geoJsonObject. |
37 | | -// This function takes parameters geoJsonObj, name, geometry |
38 | | -// Returns the geoJsonObj with name and a tempGeometry object apended |
39 | | -exports.appender = function (geoJsonObj, name, geometry) { |
40 | | - // Search for element in the geoJsonObj with a name value equal to the name parameter |
41 | | - var found = geoJsonObj.find(value => value.properties.name === name) |
42 | | - |
43 | | - // if found is not undefined we push the new geometry onto the geometries stack |
44 | | - if (found) { |
45 | | - found.tempFeatures.push(geometry) |
46 | | - // If not found then we create a new object and push the new geometry onto the stack |
47 | | - } else { |
48 | | - var l = {} |
49 | | - l.tempFeatures = [geometry] |
50 | | - l.properties = {name:name} |
51 | | - geoJsonObj.push(l) |
52 | | - } |
53 | | - return geoJsonObj; |
54 | | -} |
55 | | - |
| 1 | +/** |
| 2 | +Handle multiple geometries that may be found in the CPAD return |
| 3 | +**/ |
| 4 | +var Terraformer = require('terraformer'); |
| 5 | +var WKT = require('terraformer-wkt-parser'); |
| 6 | + |
| 7 | +// packFeatures operates over a larger geoJsonObject and operates |
| 8 | +// row by row, replacing the array of temporary WKT geometries |
| 9 | +// that were inserted by the appender with a geometry collection |
| 10 | +// object. This effectively creates a proper GeoJSON object |
| 11 | +// During the operation the tempFeatures element is deleted and |
| 12 | +// replaced by the geometries element. |
| 13 | +exports.packFeatures = function (geoJsonObj) { |
| 14 | + for (var row in geoJsonObj) { |
| 15 | + var geoJsonRow = geoJsonObj[row] |
| 16 | + // array to hold all the possible multipolygons |
| 17 | + var geometries = [] |
| 18 | + for (var feature in geoJsonRow.tempFeatures) { |
| 19 | + // convert the WKT to GeoJSON |
| 20 | + var polygon = WKT.parse(geoJsonRow.tempFeatures[feature]) |
| 21 | + // push the polygon into the geometries array |
| 22 | + geometries.push(polygon) |
| 23 | + } |
| 24 | + // create the geometry collectioh |
| 25 | + var geometryCollection = new Terraformer.GeometryCollection(geometries) |
| 26 | + |
| 27 | + // Remove the tempFeatures row now that we're done |
| 28 | + delete geoJsonRow.tempFeatures; |
| 29 | + // Combine the properties with the geometryCollection we created |
| 30 | + geoJsonObj[row] = Object.assign({},geoJsonRow,geometryCollection) |
| 31 | + } |
| 32 | + return geoJsonObj |
| 33 | + |
| 34 | +}, |
| 35 | + |
| 36 | +// Append names and geometries to a geoJsonObject. |
| 37 | +// This function takes parameters geoJsonObj, name, geometry |
| 38 | +// Returns the geoJsonObj with name and a tempGeometry object apended |
| 39 | +exports.appender = function (geoJsonObj, name, geometry) { |
| 40 | + // Search for element in the geoJsonObj with a name value equal to the name parameter |
| 41 | + var found = geoJsonObj.find(value => value.properties.name === name) |
| 42 | + |
| 43 | + // if found is not undefined we push the new geometry onto the geometries stack |
| 44 | + if (found) { |
| 45 | + found.tempFeatures.push(geometry) |
| 46 | + // If not found then we create a new object and push the new geometry onto the stack |
| 47 | + } else { |
| 48 | + var l = {} |
| 49 | + l.tempFeatures = [geometry] |
| 50 | + l.properties = {name:name} |
| 51 | + geoJsonObj.push(l) |
| 52 | + } |
| 53 | + return geoJsonObj; |
| 54 | +} |
| 55 | +
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