[mapguide-users] Precision when selecting polygons

[Dave Wilson]

MySQL only does Envelope operations.

For example when selecting MapGuide might do an Intersect spatial operation; however, MySQL (at least version 5 and earlier) only does Envelope Intersects so you won't always get the results you expect depending on how the polygons sit next to each other.

This is a known issue with MySQL. I'm not sure if they have resolved this in later versions.

Regards,
Dave

-----Original Message-----
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Krunoslav
Sent: Wednesday, April 16, 2008 2:35 AM
To: mapguide-users at lists.osgeo.org
Subject: [mapguide-users] Precision when selecting polygons


Hi.

I have one layer of polygons (parcels), which are drawn from mysql database.
Since 2.0.0., drawing performance is finally superb, but I have a small
problem with (un)precision.

When I click on some parcel, there is always wrong parcel selected (one to
left or right) as shown in image attached.

Does anyone has similar problem?
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