topic Re: How to define a Shape Comparison Language ? in ArcGIS JavaScript Maps SDK Questions

How to define a Shape Comparison Language ?

HaoHu — Mon, 03 Dec 2012 05:03:58 GMT

I have a feature layer with polygons. And I create a spatial query task to query the polygon which contains the point clicked by the user on the map (similar as identify). In this case, I can specify the spatial relation as SPATIAL_REL_INTERSECTS.

Now instead of querying the polygon contains the clicked point, I want to query all the rest polygons(the polygons do not contains the point). I think I might need to use Shape Comparison Language to specify a new type of spatial relation, just a point to polygon relation opposite to SPATIAL_REL_INTERSECTS. I know I should start with SPATIAL_REL_RELATION, but I have no idea the following steps.

Anyone can help me? Or is there any other possible solutions to that problem? Thanks in advance.

Re: How to define a Shape Comparison Language ?

Anonymous User — Mon, 28 Oct 2013 13:32:40 GMT

Bump, I had this same question. Has anyone done this?

Re: How to define a Shape Comparison Language ?

SteveCole — Mon, 28 Oct 2013 14:19:50 GMT

Unfortunately I don't have any actual code to share but here's an idea-

Query the polygons for the one poly that does intersect your point feature. Take note of the polygon's OBJECTID

Select all polygons using a "1=1" query.

Construct an array of OBJECTIDs for all polygons.

Remove the OBJECTID from the array for the polygon that did overlap the point feature

Reselect the polygons based on the array of OBJECTIDs

That should get you what you want. I think. 😄

[EDIT: this might make it easier. Once you have the overlapping polygon's OBJECTID, re-query the polygons for "OBJECTID <> (overlapping polygon OBJECTID)"]

Steve