topic Re: Select parcel, buffer it, use buffer to select parcels within buffer. How? in ArcGIS API for Flex Questions

Select parcel, buffer it, use buffer to select parcels within buffer. How?

ShawnKraft — Tue, 30 Nov 2010 19:05:54 GMT

I played with the enhanced search widget but I can't get it to work. I don't even understand how to use it. Isn't there a simpler way to select a feature, buffer it, and use the buffer to select additional features? In Flexviewer 1.3 it was simple and easy.

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

RobertScheitlin__GISP — Tue, 30 Nov 2010 19:35:05 GMT

Shawn,

I can explain how to do it in the enhanced search widget, there is nothing out there right now for FlexViewer 2.x that is simpler that I know of...

A picture is worth a thousand words so here is one using my parcels layer to select other parcels that intersect the selected parcels buffer of 20 feet.

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

ShawnKraft — Tue, 30 Nov 2010 19:55:39 GMT

K gotcha. Is the PPIN the parcel number? So, I could select a parcel graphically with this tool, then switch to the spatial search and buffer the selected parcel and grab the parcels inside the buffer correct?

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

RobertScheitlin__GISP — Tue, 30 Nov 2010 20:03:52 GMT

Shawn,

So, I could select a parcel graphically with this tool, then switch to the spatial search and buffer the selected parcel and grab the parcels inside the buffer correct?

Actually NO. You would have to do the search using the where clause. If you have :

<expression useforspatial="true">upper(PPIN) = upper('[value]%')</expression>

then you would only have to have the actual parcel number in the second layers where textbox. so instead of PPIN = '1998' than you would have just 1998. In my cadastral data a PPIN is a small unique ID for each parcel so that you don't have to type the whole 16 digit parcel number.

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

ShawnKraft — Wed, 01 Dec 2010 14:06:29 GMT

This is a good tool. I figured out how to use it from your image. Thanks Robert.

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

ShawnKraft — Thu, 02 Dec 2010 19:35:38 GMT

Robert I am going to try to build a widget to do what I need. Do you have any suggestions on how to start? I was thinking of starting by copying the Buffer using Geometry Service sample and modifying it. Figured I would ask you because you might know of any hangups with certain samples and be able to recommend one to start.

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

PaulLang — Fri, 17 Dec 2010 19:15:53 GMT

How can i change this buffer to Outside Only?

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

RobertScheitlin__GISP — Fri, 17 Dec 2010 19:20:10 GMT

Paul,

I don't believe that the Flex API can do that, there is no reference in their docs:

http://help.arcgis.com/en/webapi/flex/apiref/com/esri/ags/tasks/supportClasses/BufferParameters.html

Re: Select parcel, buffer it, use buffer to select parcels within buffer. How?

PaulLang — Fri, 17 Dec 2010 19:33:53 GMT

Thanks!
Merry Christmas