nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

union geometry not accurate

Anonymous User

Hi all,

I am working with geometryservice's union. I noticed while testing it that depending of the scale you are at the "union" does not return high quality graphs. Is there something I need to modify in my union to make it more accurate or should I just use a geoprocessing service?

Find more posts tagged with

Accepted answers

RobertScheitlin__GISP

Alex,

it looks like the geometry for the FeatureLayer is being generalized. You should use the:

yourFeatureLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">setMaxAllowableOffset</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍
yourFeatureLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">setAutoGeneralize</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">false</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

All comments

Anonymous User

Thanks Robert!

RobertScheitlin__GISP

Alex,

Comment out the

var dissolveBoundaries = new DissolveBoundaries({});

as you are not constructing this correctly.

Anonymous User

Thanks Robert,

I just added those lines but I get this error message:

function initSelectToolbar(event) {
console.log("start edits");
selectionToolbar = new Draw(event.map);
var selectQuery = new Query();
var targetGeometry;
on(selectionToolbar, "DrawEnd", function (geometry) {

var geometryService = new GeometryService("http://itas46:6080/arcgis/rest/services/Utilities/Geometry/GeometryServer");
selectQuery.geometry = geometry;
featureLayer.selectFeatures(selectQuery, FeatureLayer.SELECTION_NEW, function (targetGeometry) {
targetGeometry = graphicsUtils.getGeometries(featureLayer.getSelectedFeatures());
console.log(targetGeometry);
var dissolveBoundaries = new DissolveBoundaries({});
geometryService.union(targetGeometry, function (geometry) {
featureLayer.clearSelection();
var symbol = new SimpleFillSymbol("none", new SimpleLineSymbol("solid", new Color([255, 255, 255]), 2), new Color([255, 255, 255, 0.25]));
var graphic = new Graphic(geometry, symbol);
map.graphics.add(graphic);
console.log("unioned features");
}, function (err) {
console.log(err);
});
});
});
}

RobertScheitlin__GISP

Alex,

it looks like the geometry for the FeatureLayer is being generalized. You should use the:

yourFeatureLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">setMaxAllowableOffset</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="number token">0</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN>‍‍
yourFeatureLayer<SPAN class="punctuation token">.</SPAN><SPAN class="token function">setAutoGeneralize</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">false</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Join the Conversation

Signed in members can post, follow updates, and more. New here? Register a free account.

Quick Links

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.