[fdo-users] RE: Defining SpatialContext - how and when?

[Maksim Sestic]

Dear Gavin,

Thanks for the tip. It's still bugging me. Here's what I'm doing:

1) create new DataStore named "GIS"

2) create SpatialContext named "MGI" using following parameters:
- Name: MGI
- Description: MGI
- Coordinate System: MGI / Balkans zone 6
- Coordinate System WKT: PROJCS["MGI / Balkans zone 
6",GEOGCS["MGI",DATUM["Militar_Geographische_Institute",SPHEROID["Bessel 
1841",6377397.155,299.1528128]],PRIMEM["Greenwich",0.000000],UNIT["Decimal 
Degree",0.01745329251994330]],PROJECTION["Transverse_Mercator"],PARAMETER["Centr
al_Meridian",18],PARAMETER["Scale_Factor",0.9999],PARAMETER["False_Easting",6500
000.000000],PARAMETER["False_Northing",0.000000],UNIT["Meter",1.000000000000]]
- XY Tolerance: 0.0001
- Z Tolerance: 0.0001
- Extents Type: SpatialContextExtentType_Static
- Extents range from 0,0 to 7000000,7000000

3) create schema "TESTSCHEMA" containing one class "TESTCLASS" with
GeometryValue defined as:
geomProperty.GeometryTypes = 7
geomProperty.SpatialContextAssociation = "MGI"

-------------

Still, when I try to issue an Insert on some geometry ti throws "Error
creating spatial context (null) (SRID=486518961), the WKT provided does not
match the catalog." again.

Here's the geometry definition (sitting within specified spatial context
extents):

Dim insertCommand As IInsert =
CType(m_Transaction.Connection.CreateCommand(CommandType.CommandType_Insert),
IInsert)
insertCommand.SetFeatureClassName("TESTSCHEMA:TESTCLASS")

Dim factory As AgfGeometryFactory = New AgfGeometryFactory()
Dim pcollection As DirectPositionCollection = New DirectPositionCollection()
pcollection.Add(factory.CreatePositionXY(6500001, 4950001))
pcollection.Add(factory.CreatePositionXY(6534554.445, 4958445.342))

Dim line As ILineString = factory.CreateLineString(pcollection)
Dim geometryValue As GeometryValue = New GeometryValue(factory.GetAgf(line))
insertCommand.PropertyValues.Add(New PropertyValue("geometry",
geometryValue))
insertCommand.Execute()

---------------------------

Regards,
Maksim Sestic




Gavin Cramer wrote:
> 
> Hello, Maksim.  The "active" spatial context is a bit of a stale idea,
> and might become deprecated.  Any provider that currently cares about it
> actually sets it internally, based on the relevant geometric property's
> spatial context association.
> 
> The association can be set when creating a schema definition via
> FdoGeometricPropertyDefinition:: SetSpatialContextAssociation().
> 
> Gavin
> 
> 
> -----Original Message-----
> From: fdo-users-bounces at lists.osgeo.org
> [mailto:fdo-users-bounces at lists.osgeo.org] On Behalf Of Maksim Sestic
> Sent: Saturday, July 07, 2007 8:50 AM
> To: fdo-users at lists.osgeo.org
> Subject: [fdo-users] Defining SpatialContext - how and when?
> 
> 
> Autodesk Map 3D 2007 / MS SQL Server 2005
> 
> I have problems inserting a new GeometryValue due to the "Default"
> SpatialContext settings. "Default" SpatialContext has an envelope
> (extents)
> ranging from -2000000,-2000000 to 2000000,2000000, while my geometry
> lies
> way beyond default settings. Due to that fact, I keep receiving
> following
> error: "Error creating spatial context (null) (SRID=486518961), the WKT
> provided does not match the catalog."
> 
> I tried to update Extents value on "Default" spatial context using
> CreateSpatialContext command but it's not working (well, at least
> nothing
> changes in dbo.f_spatialcontextgroup table). Then I resorted to creating
> a
> new SC.
> 
> Now, I managed to create a new SpatialContext (named "MGI") with
> associated
> WKB string, proper extents settings, etc. Alas, I can not activate it
> :-)
> ActivateSpatialContext command does not affect present spatial contexts
> within DataStore - ISpatialContextReader always returns IsActive = False
> for
> every SC present.
> 
> I think I'm doing something wrong here, just can't figure out exactly
> what... :-) At what moment do I need to create custom SpatialContext
> (before
> or after creating feature schema?), and how do I apply newly established
> SC
> on present schema? How do I "force" my newly inserted geometric values
> "conformant" to present SC? 
> 
> Regards,
> Maksim Sestic
> 
> 
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> 18162.html#a11478212
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