[GIS] Feature Layer from JSON file

arcgis-javascript-apifeature-datasetfeature-layerjavascript

I would like to project my shapefile information on the maps. I converted my shapefile into a JSON file. How can use the Json file to create a featurecollection object in the ARCGIS Javascript API. The Json file contains 50 thousand features. Have given a sample set of my feature collection below. I do not want to embed the entire JSON file within the javascript file.

{ "type": "FeatureCollection", "features": [ { "type": "Feature", "properties": { "ROADNAME": "AAA", "LINK_INDEX": 1}, "geometry": { "type": "LineString", "coordinates": [ [ 163.554342, -77.702882 ], [
163.553160, -77.702327 ] ] } } , { "type": "Feature", "properties": { "ROADNAME": "KIAN TECK WAY","LINK_INDEX": 2}, "geometry": { "type": "LineString", "coordinates": [ [ 162.527145, -77.686591 ], [
162.522273, -77.686598 ] ] } } }

Best Answer

Here are some example to show the Json based FeatureCollection as Feature Layer in ARCGIS Javascript API Json Featurelayer 1 and Json To FeatureLayer 2. For showing the 50 Thousand write Handler which returns Json Something like this --->> Json Handler and give that output of the handler as a string to feature collection.Hope this helps you.

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var featureCollection = {
                                layerDefinition: {
                                    "geometryType": "esriGeometryPolygon",
                                    "fields": [
                                   {
                                       "name": "ID",
                                       "type": "esriFieldTypeOID",  //$Expects to be unique
                                       "alias": "ID"
                                   },
                                   {
                                       "name": "miles",
                                       "type": "esriFieldTypeString",
                                       "alias": "miles"
                                   }
                                ]
                                },
                                featureSet: fs
                            };

                            var FeatureLayer = new esri.layers.FeatureLayer(featureCollection, {
                                mode: esri.layers.FeatureLayer.MODE_SNAPSHOT,
                                infoTemplate: template,
                                outFields: ['ID', 'miles']
                            });

when we give feature collection as input to the Featurelayer it was treating id as field with unique value and and expects to be of type esriFieldTypeOID when it may be of any other type.The feature collection shows all duplicates value also but when we give feature collection as input to Featurelayer it takes only one features with duplicate value and drops other features.

[GIS] ArcGIS Feature Layer from Feature Collection using ArcGIS API for JavaScript

I see two issues in your jsfiddle example:

the functiton addBuildingFeatures is not actually being called. Add line addBuildingFeatures(); right below the function definition to call it.
After you do #1, you are still getting an error - the issue is that you are calling applyEdits and passing your buildingFeatures array of object(s) to the first parameter, but the documentation says that you must pass an array of Graphics. So you must have new Graphic(...); somewhere in your code and pass an array of those.

Hope this helps!

Best Answer

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