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README.md

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GraphMap is a way to organize image in a spatial 2D layout.
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It is a directed cyclic graph where every node has either 0 or 4 edges.
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Each node may or may not have an image on them.
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One can imagine this as a quad tree, and you are looking from the top.
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Except that any image from the child takes higher priority than parent.
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One can imagine this as a quad tree (although cycles are possible), and you are looking from the bottom.
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Each child gets a quadrant. If a child has an image it covers the parent image in that quadrant.
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If a node doesn't have an image it is invisible.
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![Graph Map structure](https://artmapstore.blob.core.windows.net/firstnodes/photos/node_image.png)
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![Graph Map structure](https://artmapstore.blob.core.windows.net/firstnodes/photos/node_image2.png)
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### Features
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- The created graph is immutable. New nodes can be added but old ones cannot be modified.
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- Inspired by my [blog article](http://blog.abhishekrao.org/2013/11/multi-level-attack.html)
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- XKCD comic on deep zoom [xkdcd1110](http://dump.ventero.de/xkcd1110/open.html)
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- 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/)
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#### Links
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- [Deep zoom links (Quora)](https://www.quora.com/What-is-Seadragon-used-for-and-how-does-it-work-in-really-simple-laymen-terms) What is OpenSeadragon

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