topic Re: Changing visual of temporal data using non-spatial fields in ArcGIS JavaScript Maps SDK Questions

Changing visual of temporal data using non-spatial fields

JayP809 — Wed, 13 Dec 2023 15:32:34 GMT

I have about 3000 unique features. Each of those features has about 50 values which I want to use to change the colors of the polylines on the map. I want to prevent redrawing the feature since it's the same spatial geometry just a different value that should control the color.

I'm having trouble thinking of the best way to do this. If I filter the features I'm assuming it would cause the features to be. redrawn. If I try to do this using a renderer I worry it will redraw each feature.

Appreciate any help and hope I explained it well.

Re: Changing visual of temporal data using non-spatial fields

KristianEkenes — Wed, 13 Dec 2023 17:11:16 GMT

I write about how you can do this in a few places. Basically, you can follow the pattern in this sample: https://developers.arcgis.com/javascript/latest/sample-code/visualization-update-data/

This is also described in this "Time styles" guide: https://developers.arcgis.com/javascript/latest/visualization/data-driven-styles/time/#attribute-animation

Here are some blog posts that provide context and more examples:

https://www.esri.com/arcgis-blog/products/js-api-arcgis/mapping/six-ways-to-visualize-change-over-time-in-web-maps/

https://www.esri.com/arcgis-blog/products/js-api-arcgis/mapping/animate-and-explore-covid-19-data-through-time/

https://www.esri.com/arcgis-blog/products/js-api-arcgis/mapping/mapping-large-datasets-on-the-web/

If you get it working, I'd love to see how it turns out.

Re: Changing visual of temporal data using non-spatial fields

Amir-Sarrafzadeh-Arasi — Thu, 14 Dec 2023 09:04:01 GMT

Dear Jay,

As I undertstand you have about 3000 unique feature layers, and all of them are polyline feature layers. They have a field in their attribute table which has about 50 different values. you want to apply a method to show your polylines with different colors. is it right?

Could you please explain in details better your situation.

I have attached a sample project which I have done with dictionary rendere for 16 different unique values for a polyline feature layer. if you explain better the situation I can help better.

good luck