Change order of polygons within a feature layer?
1978
6
07-10-2020 06:46 AM
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I have tried using the below in my initial query, and query right before drawing my polygons with class breaks.
query.orderByFields = ["Shape__Area DESC"];
However this did not seem to do anything. I have also tried using grid_value field as well.
You can see in the screenshot a 3.8 grid value polygon overlapping making the inner 6.5 and 7.8 grid_value polygons in accessible to click.
Here is my relevant code in which I am querying and then doing the drawing... main problem is occasionally large polygons block out smaller ones.. I can mostly see them, but visibility is not the issue.. I need to be able to click them as well.. if the smaller polygons would draw on top most layer, or even higher grid values on top should solve it. I found orderByFields in the docs but doesn't seem to do anything at all...
query.outFields = ["*"];
//query.orderByFields = ["Shape__Area DESC"];
query.returnDistinctValues = false;
query.returnGeometry = true;
QT.execute(query).then(function (evt) {
evt.features.forEach(function (feature) {
var att = feature.attributes
var test = geometryEngine.convexHull(feature.geometry)
var genpoly = null
if (att.grid_value <= 4.0) {
var rad = att.Shape__Length / 75
genpoly = new Circle({
center: test.centroid,
radius: rad,
radiusUnit: "meters"
})
} else {
genpoly = test
}
var polygonGraphic = new Graphic({
geometry: genpoly,
attributes: att,
type: "polygon"
});
gras.push(polygonGraphic);
});
var renderer = {
type: "class-breaks",
field: "grid_value",
classificationMethod: "esriClassifyManual",
classBreakInfos: [{
minValue: 0,
maxValue: 1.9999,
symbol: {
color: [0, 0, 0, 0],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "I (Not Felt)"
},
{
minValue: 2.0,
maxValue: 3.0,
symbol: {
color: [191, 204, 255, .3],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "II (Weak)"
},
{
minValue: 3.1,
maxValue: 3.9,
symbol: {
color: [153, 153, 255, .4],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "III (Weak)"
},
{
minValue: 4.0,
maxValue: 4.5,
symbol: {
color: [136, 255, 255, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "IV (Light)"
},
{
minValue: 4.5,
maxValue: 4.9999,
symbol: {
color: [125, 248, 148, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "V (Light)"
},
{
minValue: 6.0,
maxValue: 6.9999,
symbol: {
color: [255, 255, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "VI (Strong)"
},
{
minValue: 7.0,
maxValue: 7.9999,
symbol: {
color: [255, 221, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "VII (Very Strong)"
},
{
minValue: 8.0,
maxValue: 8.9999,
symbol: {
color: [255, 145, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "VIII (Severe) "
},
{
minValue: 9.0,
maxValue: 9.9999,
symbol: {
color: [255, 0, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "IX (Violent)"
},
{
minValue: 10.0,
maxValue: 10.9999,
symbol: {
color: [221, 0, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "X"
},
{
minValue: 11.0,
maxValue: 11.9999,
symbol: {
color: [136, 0, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "XI"
},
{
minValue: 12.0,
maxValue: 12.0,
symbol: {
color: [68, 0, 0, 1],
outline: {
color: [0, 0, 0, 0],
width: 0.4,
type: "simple-line",
style: "solid"
},
type: "simple-fill",
style: "solid"
},
label: "XII"
}
]
}
var popupTrails = {
outFields: ["*"],
"title": "Shake ID: {id}",
"content": function (feature){
let name_plc;
let dlv = document.createElement("div");
dlv.className = "popd";
dlv.innerHTML = `<b><span class='name_plc'></span></b><br>ID: <span class="ida">${feature.graphic.attributes.id}</span><br> URL: <a href="${feature.graphic.attributes.url}" target="_blank">View</a> <br> Updated: ${feature.graphic.attributes.updated} <br>Grid_value: ${feature.graphic.attributes.grid_value}<br> Event Time: ${feature.graphic.attributes.eventTime} <style>.esri-popup__navigation { display: none;}</style>`;
getName();
function getName() {
let cId = $('span.ida').text();
if (cId) {
//console.log(cId);
let q3 = new Query();
q3.where = "id = '"+ cId +"'";
q3.outFields = ["*"];
QTt.execute(q3).then(function (results) {
results.features.map(function (feat) {
let pID = feat.attributes["id"];
if (cId === pID) {
name_plc = feat.attributes["place"];
console.log(name_plc);
let tx = $('.name_plc').text();
if (tx == 0){
$(".name_plc").append(name_plc);
}
}
});
});
} else {
setTimeout(getName, 230);
}
}
return dlv;
},
};
fl = new FeatureLayer({
source: gras,
objectIdField: "ObjectID",
geometryType: "polygon",
fields: [{
name: "ObjectID",
alias: "ObjectID",
type: "oid"
}, {
name: "id",
alias: "id",
type: "string"
}, {
name: "updated",
alias: "Last Update",
type: "string"
}, {
name: "eventTime",
alias: "eventTime",
type: "string"
}, {
name: "url",
alias: "url",
type: "string"
}, {
name: "grid_value",
alias: "grid_value",
type: "double"
}],
renderer: renderer,
popupEnabled: true,
//outFields: ['*'],
popupTemplate: popupTrails,
visibleElements: [{
featureNavigation: false,
}],
});
map.add(fl);Here is my full CodePen as well.. Any way to do this client side javascript? simply change index to smallest polygons on top?! 1/3 times some of my polygons render in the correct order.. but I need to ensure they all always do, so they are visible and I can click them.
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Here is a better screenshot: For instance, I try to click the green shape in the middle, the largest blue circle highlights and the popup only displays the meta for that one. Cannot click the smaller inner ones.
i.e. before click.
i.e. after trying to click the green inner small polygon -- only outer is accessible.
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