esri-leaflet/src/Tasks/IdentifyImage.js

Leaflet plugins for consuming ArcGIS Online and ArcGIS Server services.

import { latLng } from 'leaflet';
import { Identify } from './Identify';
import { responseToFeatureCollection } from '../Util';

export var IdentifyImage = Identify.extend({
  setters: {
    setMosaicRule: 'mosaicRule',
    setRenderingRule: 'renderingRule',
    setPixelSize: 'pixelSize',
    returnCatalogItems: 'returnCatalogItems',
    returnGeometry: 'returnGeometry'
  },

  params: {
    returnGeometry: false
  },

  at: function (latlng) {
    latlng = latLng(latlng);
    this.params.geometry = JSON.stringify({
      x: latlng.lng,
      y: latlng.lat,
      spatialReference: {
        wkid: 4326
      }
    });
    this.params.geometryType = 'esriGeometryPoint';
    return this;
  },

  getMosaicRule: function () {
    return this.params.mosaicRule;
  },

  getRenderingRule: function () {
    return this.params.renderingRule;
  },

  getPixelSize: function () {
    return this.params.pixelSize;
  },

  run: function (callback, context) {
    return this.request(function (error, response) {
      callback.call(context, error, (response && this._responseToGeoJSON(response)), response);
    }, this);
  },

  // get pixel data and return as geoJSON point
  // populate catalog items (if any)
  // merging in any catalogItemVisibilities as a propery of each feature
  _responseToGeoJSON: function (response) {
    var location = response.location;
    var catalogItems = response.catalogItems;
    var catalogItemVisibilities = response.catalogItemVisibilities;
    var geoJSON = {
      pixel: {
        type: 'Feature',
        geometry: {
          type: 'Point',
          coordinates: [location.x, location.y]
        },
        crs: {
          type: 'EPSG',
          properties: {
            code: location.spatialReference.wkid
          }
        },
        properties: {
          OBJECTID: response.objectId,
          name: response.name,
          value: response.value
        },
        id: response.objectId
      }
    };

    if (response.properties && response.properties.Values) {
      geoJSON.pixel.properties.values = response.properties.Values;
    }

    if (catalogItems && catalogItems.features) {
      geoJSON.catalogItems = responseToFeatureCollection(catalogItems);
      if (catalogItemVisibilities && catalogItemVisibilities.length === geoJSON.catalogItems.features.length) {
        for (var i = catalogItemVisibilities.length - 1; i >= 0; i--) {
          geoJSON.catalogItems.features[i].properties.catalogItemVisibility = catalogItemVisibilities[i];
        }
      }
    }
    return geoJSON;
  }

});

export function identifyImage (params) {
  return new IdentifyImage(params);
}

export default identifyImage;