[mapguide][MG109][New] Great Circle buffer returns incorrect results

[Traian Stanev]

You can view the artifact detail at the following URL:

    https://mapguide.osgeo.org/servlets/Scarab/id/MG109

Type
 Defect

Artifact ID
 MG109 (Great Circle buffer returns incorrect results)

Reported by
 Traian Stanev
 traianstanev (traian.stanev at autodesk.com)

New artifact details:
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- Operating system set to new value
  All
- Steps to Reproduce set to new value
  See above.
- Summary set to new value
  Great Circle buffer returns incorrect results
- Artifact Status set to new value
  New
- Artifact created
- Platform set to new value
  All
- Component set to new value
  All
- Priority set to new value
  P2
- Submission Reviewed set to new value
  No
- Version set to new value
  1.0.0
- Defect Severity set to new value
  High
- Resolution Description set to new value
  Code in GreatCircleBufferUtil::GetOffsetPoint was scaling an offset distance given in VDC coordinates using the map coordinate system unit scale (meters per unit), instead of the VDC scale. Fixed the code to scale offset by the VDC scale.
- Description set to new value
  Doing a buffer using a great circle based coordinate system measure (like LL84) returns wildly inaccurate results.

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