topic Re: LayerList 4.4 minScale/maxScale now ignored in ArcGIS JavaScript Maps SDK Questions

LayerList 4.4 minScale/maxScale now ignored

GertConradie — Tue, 11 Jul 2017 11:03:43 GMT

Hi,

The Layerlist widget ignore the minScale/maxScale that one set on a Sublayer (of a MapImageLayer)

Sublayer minScale

So layers is not grayed out when out of scale (as is the case in version 4.3)

Any way to get around this?

Re: LayerList 4.4 minScale/maxScale now ignored

UndralBatsukh — Tue, 11 Jul 2017 16:49:58 GMT

Hi Gert,

I am able to reproduce the issue you reported. This issue will be fixed in our next release. I do not have a workaround at this time. Thank you for reporting this issue.

Re: LayerList 4.4 minScale/maxScale now ignored

GertConradie — Wed, 12 Jul 2017 03:28:08 GMT

Thanks Undral.

I use a customized version of the LayerList.tsx on GitHub, so were able to add a custom 'visibleAtCurrentScale' method as an interim fix/workaround to replace the 'item.visibleAtCurrentScale' (that have the bug).

For what it is worth - it seems the bug is in the 'isLayerOutsideScaleRange' function of "./support/layerListUtils" that might receive incorrect parameters, but I might be be wrong - it get tricky to read trough the obfuscated code.

Re: LayerList 4.4 minScale/maxScale now ignored

NathanielRindlaub — Wed, 18 Apr 2018 16:17:18 GMT

Hey there,

I'm on 4.6 and am still experiencing this issue. Did the bug ever get addressed? If not, any guidance on a non-typescript work around would be much appreciated!

Best,

Nathaniel

Re: LayerList 4.4 minScale/maxScale now ignored

RobertScheitlin__GISP — Wed, 18 Apr 2018 18:59:54 GMT

Nathaniel,

Have you tried switching your API url to 4.7 to see if it has been fixed in the latest version?

Re: LayerList 4.4 minScale/maxScale now ignored

NathanielRindlaub — Wed, 18 Apr 2018 19:02:44 GMT

Hey Robert!

Unfortunately, I have tried switching to 4.7 and I'm still experiencing the issue.

Re: LayerList 4.4 minScale/maxScale now ignored

RobertScheitlin__GISP — Wed, 18 Apr 2018 19:41:39 GMT

Must still be an issue then. Have you called tech support to report this?

Re: LayerList 4.4 minScale/maxScale now ignored

UndralBatsukh — Wed, 18 Apr 2018 20:15:04 GMT

This issue described here is fixed and here is a simple test app.

An Anonymous Pen on CodePen

Re: LayerList 4.4 minScale/maxScale now ignored

NathanielRindlaub — Wed, 18 Apr 2018 21:19:38 GMT

Ah, you're right Undral, if I set the max/min Scale on the sublayer manually when I request the MapImageLayer the app does respect them and the layers get gray-ed out appropriately.

However, the sublayer does not seem to automatically retrieve and respect the default max and min scales set on the endpoint (e.g., Layer: Flowlines (ID: 0) ).

Is that expected behavior?

Re: LayerList 4.4 minScale/maxScale now ignored

UndralBatsukh — Thu, 19 Apr 2018 14:49:38 GMT

Hi there,

I could be missing the point you are making. Can you please take a look at this app? LayerList is behaving as expected from what I see: https://codepen.io/anon/pen/zjxRaP?editors=1000

The layers become visible at scale 288895.277144 and larger scales. Greyed out otherwise. The min scale for the your layers are specified as Min Scale: 288896.

Can you please give me a simple reproducible case? Thank you,

Re: LayerList 4.4 minScale/maxScale now ignored

deleted-user-0rxRICUw9_JJ — Thu, 19 Apr 2018 15:03:39 GMT

If you don' specify the sublayers on the MapImageLayer as per your example, then the map & layer-list will show all the sublayers on the service (as expected), but ignore any scale ranges that you have on them in the layer-list.

(Not an issue currently for me, but something I noticed before)

It might be frustrating if you need to list all the sublayers on a service just to get the scale ranges active. especially if it is a complex nested structure.

Re: LayerList 4.4 minScale/maxScale now ignored

deleted-user-0rxRICUw9_JJ — Thu, 19 Apr 2018 15:14:25 GMT

Apologies - this is not correct any more - I tested this with your test codepen and it behave as expected (honoring the scales) even if i go back to v4.4

No, it is actually correct as per the use case in the next user's comment.

Re: LayerList 4.4 minScale/maxScale now ignored

NathanielRindlaub — Thu, 19 Apr 2018 16:26:39 GMT

Hi Undral,

My mistake - I should have given you a different endpoint to use. It appears as though the Layer List widget will honor sublayer scales if the parent layer has either min or max set, as is the case with the Flowlines. However, I just swapped that URL out in your codepen example for this one: NHDPlus_NP21/WBD_NP21_Simplified (MapServer) (Note, max scale and min scale both set to 0 on the parent layer, but specified in all sublayers), and the layer list widget does not seem to respect the visibility ranges of the sublayers.

Let me know if you're seeing that too.

Re: LayerList 4.4 minScale/maxScale now ignored

deleted-user-0rxRICUw9_JJ — Thu, 19 Apr 2018 16:34:07 GMT

This is what I noticed before as well - will update my responses. (again)

Re: LayerList 4.4 minScale/maxScale now ignored

UndralBatsukh — Fri, 20 Apr 2018 21:59:24 GMT

Hi there,

Sorry for the delay. What you are seeing is an expected behavior. If you are setting sublayers then you have to set the min/maxscale for them. Otherwise, they will use the parent layer's min/maxScale. For example, the parent layer's min/maxScale 0 then your sublayer will have min/maxScale of 0. If you add the parent layer without setting sublayers then min/maxscale is honored for all layers.

For example, I updated the test app just to add the mapimagelayer without setting sublayers... in this case, the min/maxscale are read from the mapservice.

Hope this makes sense,

-Undral

Re: LayerList 4.4 minScale/maxScale now ignored

NathanielRindlaub — Mon, 23 Apr 2018 19:14:29 GMT

I see, and yes that does make sense. Thanks so much for your help Undral!