Changes between Version 4 and Version 5 of MapGuideRfc6

Timestamp:

Feb 6, 2007, 10:25:43 AM (17 years ago)

Author:

tonyfang

Comment:

--

MapGuideRfc6

@@ -23 +23 @@
 == Overview ==
 
-The coordinate systems of the data can be overridden by specifying an entry in the SupplementalSpatialContextInfo of the feature source.
+In the feature source, there is an optional tag called !SupplementalSpatialContextInfo. This can contain a !SpatialContextType defining a coordinate system override. If an entry exists for a given Spatial Context, then the specified coordinate system override will be used. The coordinate system override will be given preference over the coordinate system defined in the data.
+
+Previously, the !SupplementalSpatialContextInfo was intended for data containing spatial contexts with undefined coordinate systems. The !SupplementalSpatialContextInfo would allow a coordinate system to be specified for a given spatial context. The !SupplementalSpatialContextInfo can now be used to override coordinate systems for all spatial contexts in a feature source -- regardless of whether it contains a coordinate system or not.
 
 == Motivation ==
 
-In the feature source, there is an optional tag called SupplementalSpatialContextInfo. This can contain a SpatialContextType defining a coordinate system override. If an entry exists for a given Spatial Context, then the specified coordinate system override will be used. The coordinate system override will be given preference over the coordinate system defined in the data.
-
-Previously, the SupplementalSpatialContextInfo was intended for data containing spatial contexts with undefined coordinate systems. The SupplementalSpatialContextInfo would allow a coordinate system to be specified for a given spatial context. The SupplementalSpatialContextInfo can now be used to override coordinate systems for all spatial contexts in a feature source -- regardless of whether it contains a coordinate system or not.
+If a feature source geometry contains an incorrect coordinate system or does not have a coordinate system defined, this provides a convenient way to change the coordinate system without having to change the data of the feature source.
 
 == Proposed Solution ==
 
-The schema FeatureSource-1.0.0.xsd does not change. SupplementalSpatialContextInfo already exists in the schema. The schema documentation will be updated to reflect the new behaviour in the server.
+The schema !FeatureSource-1.0.0.xsd does not change. !SupplementalSpatialContextInfo already exists in the schema. The schema documentation will be updated to reflect the new behaviour in the server.
 
 {{{
@@ -44 +44 @@
 }}}
 
-When the server returns the data for a given feature source. it will check for entries in the SupplementalSpatialContextInfo. If there is a spatial context containing a coordinate system override, then that is the coordinate system used for the data.
+When the server returns the data for a given feature source. it will check for entries in the !SupplementalSpatialContextInfo. If there is a spatial context containing a coordinate system override, then that is the coordinate system used for the data.
 
 == Implications ==
 
-SupplementalSpatialContextInfo is an optional field. If the feature source does not contain an override, then the server will use the coordinate system contained in the data.
+!SupplementalSpatialContextInfo is an optional field. If the feature source does not contain an override, then the server will use the coordinate system contained in the data.
 
-For previous versions of the server, the SupplementalSpatialContextInfo field is not used when the coordinate system is defined in the data.
+For previous versions of the server, the !SupplementalSpatialContextInfo field is not used when the coordinate system is defined in the data.
 
 == Test Plan ==