Introduces Bell, Shoemake, and Chen trackball implementations and provides a comparison of the method. Also discusses user studies on each method. Useablity studies on Bell technique is a possible research topic.  
 
@ARTICLE{TM2004  
, AUTHOR = {Knud Henriksen, Jon Sporring, and Kasper Hornbaek}  
, TITLE = {Virtual Trackballs Revisited}  
, JOURNAL = {IEEE Transactions on Visualization and Computer Graphics}  
, YEAR = {2004}  
, MONTH = {Mar./Apr.}  
, VOLUME = {10}  
, NUMBER = {2}  
, PAGES = {206-216}  
, NOTE = {}  
, KEYWORDS = {}  
, ANNOTE = {}  
, INLIBRARY = {}  
, ABSTRACT =  
{  
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}  

Posted by: Chad Steed

@INPROCEEDINGS{KCLK2001 
, AUTHOR = {Sung-Soo Kim and Seung-Keol Choe and Jong-Hun Lee and Young-Kyu Yang} 
, TITLE = {Level-of-detail-based Rendering and Compression for 3D GIS} 
, BOOKTITLE = {Proceedings: International Geoscience and Remote Sensing Symposium} 
, YEAR = {2001} 
, EDITOR = {} 
, ORGANIZATION = {IEEE} 
, MONTH = {July} 
, ADDRESS = {Sydney, Australia} 
, PUBLISHER = {} 
, PAGES = {1942-1944} 
, NOTE = {} 
, KEYWORDS = {} 
, ANNOTE = {} 
, INLIBRARY = {} 
, ISBN = {} 
, ABSTRACT = 
{ 
} 
} 

Posted by: Chad Steed

@INPROCEEDINGS{PAL2002 
, AUTHOR = {Renato Pajarola and Marc Antonijuan and Roberto Lario} 
, TITLE = {QuadTIN: Quadtree based Triangulated Irregular Networks} 
, BOOKTITLE = {Proceedings: IEEE Visualization 2002} 
, YEAR = {2002} 
, EDITOR = {Robert Moorhead and Markus Gross and Kenneth I. Joy} 
, ORGANIZATION = {IEEE Computer Society} 
, MONTH = {Nov.} 
, ADDRESS = {Boston, Massachusetts} 
, PUBLISHER = {} 
, PAGES = {395-402} 
, NOTE = {} 
, KEYWORDS = {} 
, ANNOTE = {} 
, INLIBRARY = {} 
, ISBN = {} 
, ABSTRACT = 
{ 
} 
} 

Posted by: Chad Steed

Losasso and Hoppe describe an approach for managing LODs for large terrain datasets. The "geometry clipmap" technique uses a series of nested regular grids that are centered on the viewer's location, to optimally feed the graphics pipeline. This technique does not require preprocessing of refinement criteria and can be created on-the-fly. 
 
@ARTICLE{LH2004 
, AUTHOR = {Frank Losasso and Hugues Hoppe} 
, TITLE = {Geometry Clipmaps: Terrain Rendering Using Nested Regular Grids} 
, JOURNAL = {ACM Transactions on Graphics} 
, YEAR = {2004} 
, MONTH = {Aug.} 
, VOLUME = {23} 
, NUMBER = {3} 
, PAGES = {769-776} 
, NOTE = {} 
, KEYWORDS = {} 
, ANNOTE = {} 
, INLIBRARY = {} 
, ABSTRACT = 
{ 
} 
} 

Posted by: Chad Steed

@ARTICLE{HDJ2005 
, AUTHOR = {Lok M. Hwa and Mark A. Duchaineau and Kenneth I. Joy} 
, TITLE = {Real-time Optimal Adaptation for Planetary Geometry and Texture: 4-8 Tile Hierarchies} 
, JOURNAL = {IEEE Transactions on Visualization and Computer Graphics} 
, YEAR = {2005} 
, MONTH = {Aug.} 
, VOLUME = {11} 
, NUMBER = {4} 
, PAGES = {355-368} 
, NOTE = {} 
, KEYWORDS = {} 
, ANNOTE = {} 
, INLIBRARY = {} 
, ABSTRACT = 
{ 
} 
} 

Posted by: Chad Steed