Images on a quad graph
# GraphMap Organizing the images of the world
GraphMap is a way to organize image in a spatial 2D layout. It is a directed cyclic graph where every node has either 0 or 4 edges. Each node may or may not have an image on them. One can imagine this as a quad tree, and you are looking from the top. Except that any image from the child takes higher priority than parent. If a node doesn’t have an image it is invisible.
### Features - The created graph is immutable. New nodes can be added but old ones cannot be modified. - Functional approach is used, GraphMap class returns a Result value and does not throw exception.
### Inspiration - [Deep Zoom Images](https://msdn.microsoft.com/en-us/library/cc645077%28v=vs.95%29.aspx?f=255&MSPPError=-2147217396) for viewing the images - Inspired by my [blog article](http://blog.abhishekrao.org/2013/11/multi-level-attack.html) - XKCD comic on deep zoom [xkdcd1110](http://dump.ventero.de/xkcd1110/open.html) - The graph created by the API is [Persistent Immutable DataStructure](https://en.wikipedia.org/wiki/Persistent_data_structure). The ideas used are similar to the ones explaine in this video [Immutable JS](http://facebook.github.io/immutable-js/)
### Related - [Deep zoom links](https://www.quora.com/What-is-Seadragon-used-for-and-how-does-it-work-in-really-simple-laymen-terms)
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