Hi all, A few days ago I asked about how to implement a coverage defined on a mathematical function on the users' list. Simone and Martin replied with info about using JAI's ImageFunction directly or indirectly - this was a big help.
Sometime soon I'll have a need for a leaner (in terms of overhead) approach. I am working on a simulation where entities move within a landscape, their movements being influenced by local resources, hazards etc. I want to provide for resource coverages where value is defined by a mathematical function, the inputs to which may be position and/or time and/or spatial relationship with features (sens lat) in other coverages. Frequently, resource value will only be queried over a tiny fraction of the total extent of a coverage. In such cases I'm worried that there is a large redundant overhead in creating a large image with JAI to back the coverage. One approach to this would be a type of coverage based on a mathematical function (passed to its constructor perhaps). It would use lazy instantiation so that the function would only be parsed into some efficiently runnable form (an AST perhaps) when the coverage is first queried for a value. There would be some facility to create a backing image for cases where it is known a priori that a large number of locations will be queried. Does this sound like it would have any general use ? If so, I would be happy to being hacking it as an unsupported module - I'll be doing it for my own app anyway. I'd be very grateful for any comments, tips on related work already happening etc. cheers Michael ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Geotools-devel mailing list Geotools-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-devel
