Is there any documented free R-Tree implementation for .NET? [closed]

Question

I found some open source R-Tree implementations in C#, but none with documentation nor signs of being used by someone else than the developer.

Birdsall

what kind of index are you looking for? If you are looking for real DB index with page organisation - it's hard to find one. I have c# in-memory index. I will not write any documentation, but I think it won't be hard to answer some questions (: – Strobotron

Answer 1

The NetTopologySuite is a JTS port to C# and it contains a STRtree class which is a read-only R-Tree

Birdsall

Answer 2

I know of none, but I would point out that libraries like this tend to:

• Get written (normally with some bugs).
• Bugs get ironed out though use.
• All active bugs are fixed
• Optional
  • 'Latent' bugs which could never happen due to previous semantics of the platform on which the library operates crop up if the platform changes in some way.

Thus lack of activity in terms of commits for the library should not indicate that the library is dead, it may indicate it is very stable and solid. If the library is either easy to understand or targeted at a relatively sophisticated audience (as R-Tree usage currently is) then you may find little online dialogue about it.

Lack of download activity is somewhat worrying. Though you are using a fairly niche library on a platform not previously known for heavy GIS/spatial query work (though the changes in SQL Server 2008 may change that).

If you cannot find a Java library of appropriate activity it is unlikely you will find a c# one. If you find such a java one a direct (as opposed to idiomatic) port is unlikely to encouter problems.

Builtin

Answer 3

According to this thread there is an R-Tree implementation as part of Perst: http://www.mcobject.com/perst_eval

Hanford

Why the down-vote? I cited the rumor and even found a working link. – Hanford

Answer 4

RBrush seems to be pretty mature and it has 103 stars on github.

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