[mapguide-users] Issues selecting a feature with custom coding

Kenneth, GEOGRAF A/S ks at geograf.dk
Thu Jan 10 03:32:29 EST 2008

If you select the feature, you can read the WKT or BoundingBox for the 
With this info, you can calculate the Center X,Y + Scale, and manually 
zoom to it.

I have not worked enough with the selection to understand it completely.
However, I think you are mistaken about the Base64 functions not being 
What appears to be different about the two encodings?

If they truly are different, it is very easy to write your own base64 
encoding/decoding functions.

Regards, Kenneth, GEOGRAF A/S

nclayton skrev:
> Hi everyone,
> Here is my situation:
> I am hacking up the mapviewerphp files to fit the needs of the company I
> work for. One piece of functionality that is requried is that after a user
> queries our database for owner information, it is displayed in a new frame.
> Along with this information, there is a 'Zoom to Parcel' link. When the user
> clicks this, it should zoom to that parcel and select it without affecting
> the owner data list.
> My issue right now is in the selection of the parcel. I'm folling the code
> given in the dev guide, but my $selection->ToXml() always comes out as:
> <?xml version="1.0" encoding="UTF-8"?><FeatureSet
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xsi:noNamespaceSchemaLocation="FeatureSet-1.0.0.xsd"></FeatureSet>
> I am creating and passing in a query filter of "PARCEL_ID_ = '12345'" (with
> the appropriate parcel number supplied of course). I know that this
> PARCEL_ID_ value exists.
> I have tried manually creating the featureset query, since I can get the
> feature id of the selected parcel. The problem with that is that mgos uses a
> base64 encoding that doesn't match php's base64_encode() output, so that's a
> no-go as well.
> Any help and suggestions are appreciated
> --
> Nick

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