[mapguide-trac] #1760: Remove dependency on TF.net

[MapGuide Open Source]

#1760: Remove dependency on TF.net
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   Reporter:  jng      |       Owner:  jng
       Type:  task     |      Status:  new
   Priority:  low      |   Milestone:     
  Component:  Maestro  |     Version:     
   Severity:  trivial  |    Keywords:     
External_id:           |  
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 The tf.net library used by the Maestro API is rarely maintained and should
 be removed.

 When we look at what is actually being used from Topology.dll, which is
 the merged result of NTS, GeoAPI, ProjNet and other libraries

  * Maestro exposes GeoAPI's geometry interfaces
  * Maestro uses ProjNet's (weak, but sufficient) coordinate transformation
 capabilities
  * The features unique to tf.net (MapGuide Geometry <-> GeoAPI geometry)
 can easily be replicated directly in the Maestro API itself.

 It will be simpler from a maintenance perspective to use NTS directly and
 provide our own MapGuide Geometry <-> custom geometry conversion. This
 opens up future lines of integration with NTS in the future, as we can
 keep NTS up to date as needed. Whereas tf.net is constrained by having
 seriously old version of NTS.

 To avoid leaking out the NTS dependency as Maestro currently does, it
 should define as much of the GeoAPI geometry interfaces directly in the
 Maestro API. The implementation specific Maestro API assemblies can then
 handle the required conversion logic as necessary. By not leaking out NTS
 dependencies, consuming applications will only need to reference the
 MaestroAPI assembly at compile time and not MaestroAPI + tf.net as it
 currently does.

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Ticket URL: <http://trac.osgeo.org/mapguide/ticket/1760>
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