Hi Dan: Dan D'Alimonte wrote: > Hi; > > I have just began looking at GeoTools as a possible way to enhance a > landscape modelling framework that we are working on. Currently we are > using matrices to hold raster data (which is usually not imagery), with > limited spatial referencing. By using GeoTools we are hoping to make it > more robust, especially in the spatial referencing area. > Interesting problem; my matrices do you just mean a big old array? > The big issue I've been having is how to work with raster coverages. > Most of the documentation I have been looking over the last two days > have talked about visualizing and transforming file formats of grid > data. The documentation is very minimal; please review the test cases - the documentation in the user guide consists of what I have figured out in my spare time :-) The project I am working on (http://udig.refractions.net/) is still using an older version of geotools where coverage support is even more minimal :-) > What I have not seen in the API, any example code or user guides I have > looked at is straightforward a way to query the values of one or a > group of cells in a grid, and to perform simple map algebra on one or more > grid layers based on the cell values. In other words, simple raster > GIS calculation and overlay functions. > I tried to write up an example that was mentioned on the user list; the function is "extract"; I am not sure what you mean by simple map algebra? > If someone is able to point me to a resource that would explain how this > could be accomplish, with examples, I'd be grateful. > Test cases :-P
You will find that there was a google summer of code project covering some of the ideas of a "grid calculator"; I am not sure if it was selected. I do recommend you check out this project - http://jgrass.dev.fsc.bz.it/ it does a bunch of raster stuff. Jody ------------------------------------------------------------------------- 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-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
