[mapguide][MG129][New] Great Circle azimouth computation is numerically unstable

[Traian Stanev]

You can view the artifact detail at the following URL:

    https://mapguide.osgeo.org/servlets/Scarab/id/MG129

Type
 Defect

Artifact ID
 MG129 (Great Circle azimouth computation is numerically unstable)

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

New artifact details:
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- Subcomponent set to new value
  General
- Summary set to new value
  Great Circle azimouth computation is numerically unstable
- Artifact Status set to new value
  New
- Steps to Reproduce set to new value
  Da a 1 foot buffer around a parcel on the Sheboygan sample. The CGI agent will either crash or the resulting buffer will be very wrong (bigger than the world).
- Artifact created
- Version set to new value
  1.0.0
- Platform set to new value
  All
- Priority set to new value
  P2
- Operating system set to new value
  All
- Component set to new value
  All
- Description set to new value
  The great circle azimouth computation code in CoordSys.cpp is not numerically stable -- for points very close to each other, like 1 foot distance for example, the math would break down and return NaN.
- Defect Severity set to new value
  Medium

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