make a selection with x/y

[Anonymous]

Is there any way to code a forced selection of and object by using a range of x/y coordinate values?

[Anonymous]

Which version of MapGuide are you using? MapGuide 6.5 or below or MapGuide
Enterprise?

Andy

wrote in message news:5267704@discussion.autodesk.com...
Is there any way to code a forced selection of and object by using a range
of x/y coordinate values?

[Anonymous]

I'm not totally sure at the moment because I am not at my machine...but I think 6.5

[Anonymous]

This could be done completely programatically, but
is a bit complicated.  Here is the basic flow:

• Create a temporary redline rectangle based on
  your range of x/y coordiante values. 


• Select the redline object


• Perform a select within based on the redline
  rectangle while specifying the desired layer to select objects on


• Delete the redline object


• Retrieve your selected object keys or whatever
  else you need to do

--
Andy Morsell, P.E.
Spatial Integrators, Inc.

href="http://www.SpatialGIS.com">http://www.SpatialGIS.com

 

<bryanpb11> wrote in message
href="news:5268213@discussion.autodesk.com">
size=2>news:5268213@discussion.autodesk.com
size=2>...

I'm not totally sure at the
moment because I am not at my machine...but I think 6.5

[Anonymous]

I can kind've see how to go about doing this...however when I look at the developers guide I always only see examples for .php. Is there any way to do this stricly in javascript or C# in and .aspx page from the task frame?

[Anonymous]

You're not using MapGuide 6.5 then, you are using MapGuide Enterprise. My
workflow still somewhat applies, but the underlying programming code will be
significantly different. You won't need to create a temporary redline
object if you already know the lat,lon coordinates you are using. In this
case, you can use the FDO API to do a spatial query against the desired
layer feature source based on an envelope you compute from your points,
create the selection set object (which will be on the server) from the
returned query results, then refresh the map with the client JavaScript API.

The developers guide only has PHP examples. I don't know if they are
planning to produce an equivelent .NET and Java guide. The downloadable
sample application from the OSGeo site at
https://mapguide.osgeo.org/servlets/ProjectDocumentList?folderID=10&expandFolder=10&folderID=36
are available in all 3 languages, however.

Andy

wrote in message news:5268748@discussion.autodesk.com...
I can kind've see how to go about doing this...however when I look at the
developers guide I always only see examples for .php. Is there any way to
do this stricly in javascript or C# in and .aspx page from the task frame?

[Anonymous]

Is there anyway to just set the selection using four points?

[Anonymous]

Pretty much what I previously described will work. You have to create a
polygon envelope based on your 4 points and then do a spatial intersection
query against your desired feature source(s).

You could also look at using the API digitizing tools to create a temporary
object and then doing a select within or buffer based on that temporary
polygon.

Andy

wrote in message news:5269177@discussion.autodesk.com...
Is there anyway to just set the selection using four points?

[Anonymous]

One last question is it possible to build an XML selection string in javascript so as to use in with setSelectionXML()?

[Anonymous]

Sure, that would probably work. But you have to know the internal FEATID's
of each feature you want to select first. Doing an FDO query may be the
only way to accomplish this.

Andy

wrote in message news:5269375@discussion.autodesk.com...
One last question is it possible to build an XML selection string in
javascript so as to use in with setSelectionXML()?