topic Point Clustering - changing query won't update map in ArcGIS JavaScript Maps SDK Questions

Point Clustering - changing query won't update map

South_JordanCity_of — Mon, 23 Jan 2017 18:13:54 GMT

Hi all!

based on the modified esri example for clustering points I found on GitHub at

GitHub - Esri/cluster-layer-js: One example of how to cluster many point features,

I'm trying to figure out how to update the map when the query changes.

For example, I have a map that shows all 2016 traffic accidents. Everything works fine, points are clustering, etc.. The user should have the option to show only non-injury accidents with the click of a checkbox or button. The query works, but the map still displays all points, regardless of the used (changed) query.

I can't figure out how to redraw/re-create the clusterfeaturelayer and show only non-injury accidents.

Any ideas?

Thanks for your help!!

Marc Seliger

Re: Point Clustering - changing query won't update map

FC_Basson — Tue, 24 Jan 2017 10:24:07 GMT

Hi Marc, how are you updating the query? I've only found that it can be done by setting the private attribute "_where" like for a layer definition query and then the cluster graphics layer does not respond to the redraw() function like it should but updates on a map extent change event. It also does not want to respond to setting the layer definition query back to the original where clause.

Re: Point Clustering - changing query won't update map

FC_Basson — Tue, 24 Jan 2017 10:38:27 GMT

And let's tag the developer alaframboise-esristaff‌

Re: Point Clustering - changing query won't update map

South_JordanCity_of — Wed, 25 Jan 2017 14:53:07 GMT

It seems that it works now for me, but I ended up with a slightly different version of the clustering. Basically, I have a bunch of check boxes that determine the query and pass the queryText to the runQuery function. I also declared the clusterLayer as a global variable. The key was to remove the clusterLayer from the map

map.removeLayer(clusterLayer);‍

and then call the runQuery function again. This might not be the most elegant coding, but at least it works now. More fine tuning is required regarding icons, map layout, etc...

All files are attached in the zip file.

Cheers!

Marc

Re: Point Clustering - changing query won't update map

South_JordanCity_of — Wed, 25 Jan 2017 14:56:55 GMT

..and something is still screwy with the pop-ups (can't close it), I'm still working on it....

Re: Point Clustering - changing query won't update map

South_JordanCity_of — Wed, 25 Jan 2017 15:10:06 GMT

ok, after changing all esri file versions to 3.19, the pop-ups are now behaving as they should. Initially, the versions differed (3.19 and 3.11)

Re: Point Clustering - changing query won't update map

South_JordanCity_of — Wed, 25 Jan 2017 16:22:37 GMT

here's a working example:

Cluster

however, if you look at the console, i get the error

svg.js:43 Error: <circle> attribute cx: Expected length, "NaN".

this is because the map draws over 1000 features. If I take out the non-injury accidents, the error disappears, but I have no idea how to fix it.

any ideas?

Marc