Changes between Initial Version and Version 1 of MapGuideRfc6

Timestamp:

Feb 5, 2007, 5:30:44 PM (17 years ago)

Author:

tonyfang

Comment:

--

MapGuideRfc6

@@ +1 @@
+= !MapGuide RFC 6 - Overriding Coordinate Systems in Feature Sources =
+
+This page contains a change request (RFC) for the !MapGuide Open Source project.  
+More !MapGuide RFCs can be found on the [wiki:MapGuideRfcs RFCs] page.
+
+
+== Status == 
+ 
+||RFC Template Version||(1.0)|| 
+||Submission Date||February 5, 2007||
+||Last Modified||Tony Fang [[Timestamp]]||
+||Author||Tony Fang||
+||RFC Status||draft||
+||Implementation Status||pending||
+||Proposed Milestone||1.2||
+||Assigned PSC guide(s)||(when determined)||
+||'''Voting History'''||(vote date)||
+||+1|| ||
+||+0|| ||
+||-0|| ||
+||-1|| ||
+ 
+== Overview ==
+
+The coordinate systems of the data can be overridden by specifying an entry in the SupplementalSpatialContextInfo of the feature source.
+
+== 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 which contained an undefined coordinate system. The SupplementalSpatialContextInfo would allow the user to specify a coordinate system for the data. The SupplementalSpatialContextInfo can now be used for all feature sources.
+
+== 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.
+
+{{{
+  <xs:element name="SupplementalSpatialContextInfo" type="SpatialContextType" minOccurs="0" maxOccurs="unbounded">
+    <xs:annotation>
+      <xs:documentation>Additional information for a spatial context when the coordinate system is overridden.
+      </xs:documentation>
+    </xs:annotation>
+  </xs:element>
+}}}
+
+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.
+
+For previous versions of the server, the SupplementalSpatialContextInfo field is not used. It will use the coordinate system defined by the data.
+
+== Test Plan ==
+
+Add unit tests to test coordinate system overrides.
+
+== Funding/Resources ==
+
+Autodesk to supply