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| import EsriJSON from 'ol/format/EsriJSON.js';
import Map from 'ol/Map.js';
import VectorSource from 'ol/source/Vector.js';
import View from 'ol/View.js';
import XYZ from 'ol/source/XYZ.js';
import {
Draw,
Modify,
Select,
defaults as defaultInteractions,
} from 'ol/interaction.js';
import {Tile as TileLayer, Vector as VectorLayer} from 'ol/layer.js';
import {createXYZ} from 'ol/tilegrid.js';
import {fromLonLat} from 'ol/proj.js';
import {tile as tileStrategy} from 'ol/loadingstrategy.js';
const serviceUrl =
'https://sampleserver6.arcgisonline.com/arcgis/rest/services/Wildfire/FeatureServer/';
const layer = '2';
const esrijsonFormat = new EsriJSON();
const vectorSource = new VectorSource({
loader: function (extent, resolution, projection) {
const url =
serviceUrl +
layer +
'/query/?f=json&' +
'returnGeometry=true&spatialRel=esriSpatialRelIntersects&geometry=' +
encodeURIComponent(
'{"xmin":' +
extent[0] +
',"ymin":' +
extent[1] +
',"xmax":' +
extent[2] +
',"ymax":' +
extent[3] +
',"spatialReference":{"wkid":102100}}'
) +
'&geometryType=esriGeometryEnvelope&inSR=102100&outFields=*' +
'&outSR=102100';
$.ajax({
url: url,
dataType: 'jsonp',
success: function (response) {
if (response.error) {
alert(
response.error.message + '\n' + response.error.details.join('\n')
);
} else {
const features = esrijsonFormat.readFeatures(response, {
featureProjection: projection,
});
if (features.length > 0) {
vectorSource.addFeatures(features);
}
}
},
});
},
strategy: tileStrategy(
createXYZ({
tileSize: 512,
})
),
});
const vector = new VectorLayer({
source: vectorSource,
});
const raster = new TileLayer({
source: new XYZ({
attributions:
'Tiles © <a href="https://services.arcgisonline.com/ArcGIS/' +
'rest/services/World_Topo_Map/MapServer">ArcGIS</a>',
url:
'https://server.arcgisonline.com/ArcGIS/rest/services/' +
'World_Topo_Map/MapServer/tile/{z}/{y}/{x}',
}),
});
const draw = new Draw({
source: vectorSource,
type: 'Polygon',
});
const select = new Select();
select.setActive(false);
const selected = select.getFeatures();
const modify = new Modify({
features: selected,
});
modify.setActive(false);
const map = new Map({
interactions: defaultInteractions().extend([draw, select, modify]),
layers: [raster, vector],
target: document.getElementById('map'),
view: new View({
center: fromLonLat([-110.875, 37.345]),
zoom: 5,
}),
});
const typeSelect = document.getElementById('type');
typeSelect.onchange = function () {
draw.setActive(typeSelect.value === 'DRAW');
select.setActive(typeSelect.value === 'MODIFY');
modify.setActive(typeSelect.value === 'MODIFY');
};
const dirty = {};
selected.on('add', function (evt) {
const feature = evt.element;
feature.on('change', function (evt) {
dirty[evt.target.get('objectid')] = true;
});
});
selected.on('remove', function (evt) {
const feature = evt.element;
const fid = feature.get('objectid');
if (dirty[fid] === true) {
const payload =
'[' +
esrijsonFormat.writeFeature(feature, {
featureProjection: map.getView().getProjection(),
}) +
']';
const url = serviceUrl + layer + '/updateFeatures';
$.post(url, {f: 'json', features: payload}).done(function (data) {
const result = typeof data === 'string' ? JSON.parse(data) : data;
if (result.updateResults && result.updateResults.length > 0) {
if (result.updateResults[0].success !== true) {
const error = result.updateResults[0].error;
alert(error.description + ' (' + error.code + ')');
} else {
delete dirty[fid];
}
}
});
}
});
draw.on('drawend', function (evt) {
const feature = evt.feature;
const payload =
'[' +
esrijsonFormat.writeFeature(feature, {
featureProjection: map.getView().getProjection(),
}) +
']';
const url = serviceUrl + layer + '/addFeatures';
$.post(url, {f: 'json', features: payload}).done(function (data) {
const result = typeof data === 'string' ? JSON.parse(data) : data;
if (result.addResults && result.addResults.length > 0) {
if (result.addResults[0].success === true) {
feature.set('objectid', result.addResults[0]['objectId']);
} else {
const error = result.addResults[0].error;
alert(error.description + ' (' + error.code + ')');
}
}
});
});
|
)
