topic Re: WAB - widget to buffer polygon perimeter? in ArcGIS Web AppBuilder Questions

WAB - widget to buffer polygon perimeter?

ElizabethB — Fri, 19 Aug 2016 16:21:51 GMT

Hello all - I need a widget that will buffer the outside of a polygon - not the centroid. User will type in address and then the widget should allow them to buffer their entire parcel. (Goal is to locate fire hydrants that are within 500, 1000, or 1500 feet from the parcel boundary). NearMe only does the centroid. The situational analysis widget is great except users shouldn't draw their own polygons. Is there anything canned I can use? Any advice appreciated, thanks!

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Fri, 19 Aug 2016 16:31:04 GMT

Elizabeth,

This is a workflow that the eSearch was designed for.

https://community.esri.com/docs/DOC-1731

But if you are not using WAB Dev then you can use the the query widget in WAB 2.1 to how mimics the eSearches ability to buffer and do spatial queries.

Re: WAB - widget to buffer polygon perimeter?

ElizabethB — Fri, 19 Aug 2016 18:07:16 GMT

Thanks, Robert, I'll give this a try. I hope to one day be ready to tackle your Enhanced Search Widget, I've heard a LOT of great things about it - I'll have to introduce myself to WAB Dev, though

Thanks again-

Re: WAB - widget to buffer polygon perimeter?

AndrewValenski — Fri, 19 Aug 2016 18:23:40 GMT

Elizabeth B‌

If you have an ArcGIS Server site, you can also publish a geoprocessing service that buffers polygons and looks for intersections with that buffer. Web App Builder (AGOL, Portal & Dev) all support the geoprocessing widget where these calls can be made. This will also accomplish the workflow you're looking for, it sounds. If you have not worked with this widget before, you can check out the documentation page here: Geoprocessing widget—Web AppBuilder for ArcGIS | ArcGIS

Thanks!

Re: WAB - widget to buffer polygon perimeter?

ElizabethB — Fri, 19 Aug 2016 19:12:47 GMT

Oh thanks, this might be the way to go - the query widget isn't letting me work with the results of the query. I'll try this next. Thank you!

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Fri, 19 Aug 2016 19:22:48 GMT

Elizabeth,

What do you mean by this:

the query widget isn't letting me work with the results of the query

Re: WAB - widget to buffer polygon perimeter?

ElizabethB — Fri, 19 Aug 2016 19:50:41 GMT

Here's what I'm trying to do: User searches on parcel layer (using Address field) -> then I need to take the parcel that was selected and buffer that by 500/1000/1500 ft -> then select and highlight any hydrants within that buffer distance -> then display info on hydrants in a popup. I'm sure the issue is me but it's not letting me get hydrants within a buffer distance....

Re: WAB - widget to buffer polygon perimeter?

AndrewValenski — Fri, 19 Aug 2016 20:02:46 GMT

Elizabeth

The model you're looking to deploy is the following:

Please let me know if you need help creating this!

Thanks,

Andrew

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Fri, 19 Aug 2016 21:14:44 GMT

Elizabeth,

Hmm. the Query widget does not seem to mimic the eSearch functionality when it deals with working spatial selections. The way that it has to be done is outlined below:

Setup your parcel query to select the parcel of interest by some attribute value.
Setup your hydrant query choosing the "Only return features that have a spatial relationship with features in another layer" and then expand that option to select the ability to buffer.
Select you parcel layer and execute the query.
Select the hydrant query task next and choose the Related layer as the results from step 3 and specify your buffer distance.

Re: WAB - widget to buffer polygon perimeter?

ElizabethB — Fri, 19 Aug 2016 21:18:31 GMT

Robert-

I've been going down the Developer Edition rabbit hole - because I want to try and use your Enhanced Search widget. I have it in my C:\WebAppBuilderForArcGIS\widgets folder but when i open a new app it is not listed. Am I missing a step somewhere?

Thanks-

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Fri, 19 Aug 2016 21:23:42 GMT

Elizabeth,

When you install a custom widget if your WAB program located at C:\WebAppBuilderForArcGIS then you add new widgets to this path:

C:\WebAppBuilderForArcGIS\client\stemapp\widgets folder for the eSearch widget you would extract the eSearch folder fro the download to the C:\WebAppBuilderForArcGIS\client\stemapp\widgets folder.

Re: WAB - widget to buffer polygon perimeter?

SvivaManager — Mon, 22 Aug 2016 16:07:52 GMT

Hello Robert, sorry to burge in like that but this is the closest answer I could find to my question regarding your wonderful eSearch Widget.. I notice that when doing buffer, the buffer runs over the shape itself rather than the search results.. is there a way to run the buffer on the search results instead? Am I missing here something?

Kind Regards,

Shay.

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Mon, 22 Aug 2016 16:12:24 GMT

Shay,

I notice that when doing buffer, the buffer runs over the shape itself rather than the search results..

??? What do you mean rather than the search results?

Re: WAB - widget to buffer polygon perimeter?

SvivaManager — Mon, 22 Aug 2016 16:18:08 GMT

What I mean is that the buffer runs over the shape of the eSearch tool.

Is it possible to make it run on the search results polygon/point ? I've attached a picture to demonstrate - it's the line I draw that has a buffer but I'm trying to buffer the result itself..

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Mon, 22 Aug 2016 16:42:32 GMT

Sviva,

When using by shape the buffer will always be applied to the drawn shape. If you want to buffer the results of the by shape or by value then you must use the by spatial tab to do so.

Re: WAB - widget to buffer polygon perimeter?

SvivaManager — Mon, 22 Aug 2016 19:56:25 GMT

ugh brilliant! I had a feeling I'm missing something I'm thinking on trying to extend your widget to have the ability for the users to choose which existing layer (or not?.. still need to think it through) they would like to add manually to the enhance search widget.. in one hand it's not practical to add all layers to the eSearch widget but on the other, they want to choose which layer to run the buffer on... Any chance you can estimate the complexity of such feature? enable the user to insert a layer address and inject it straight into the eSearch widge..

Shay.

Re: WAB - widget to buffer polygon perimeter?

ElizabethB — Mon, 22 Aug 2016 20:19:18 GMT

Robert-

Your e-search widget is great! Is there a way to get it to select the hydrants that are inside the buffer? Thanks!

Re: WAB - widget to buffer polygon perimeter?

RobertScheitlin__GISP — Mon, 22 Aug 2016 20:32:33 GMT

Elezabeth,

Sure, just use the by spatial tab and select hydrants from the dropdown.

Re: WAB - widget to buffer polygon perimeter?

GeraldStanuch — Fri, 16 Dec 2016 21:37:23 GMT

The "Situation Awareness" widget documentation shows two ways to define a location. You can draw a location using the widget's draw tools, or click an existing feature and choose "Set Location" in the feature's pop-up window. You don't have to draw or trace the parcel you want to buffer. And once a parcel is set, you can click on additional parcels and add/remove them in their pop-up. You can download the results to a file. Easiest way I've found to buffer a parcel and select the surrounding parcels to create a notification mail merge.