<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta content="text/html;charset=UTF-8" http-equiv="Content-Type"></head><body ><div style='font-size:;font-family:Verdana,Arial,Helvetica,sans-serif;'>Dear listers,<div><br></div><div>I need support for Raster Attribute Tables (RAT) when using the GDAL virtual format (VRT). It seems that the current VRT driver does not support RATs. I would like to know if:</div><div>- I am correct on the above assumption?</div><div>- If I am, are there any plans to extend the VRT driver to support RATs?</div><div>- other people have the same problem and are interested in solving it.</div><div><br></div><div>I am aware that RAT support for VRT poses some challenges as VRT files only reference other files and don't include data itself. A virtual RAT is only easy to implement if all referenced tiles use the same RAT. In case the RATs were different, i.e. reduced to the rows that are needed for a specific tile, then a virtual RAT would have to be created out of all referenced RATs or (somehow like a cache) the virtual RAT would have to be created at the time of the creation of the VRT file and then stored alongside it.</div><div><br></div><div>Comments, feedbacks etc very much appreciated.</div><div><br></div><div><br></div><div>Cheers,</div><div><br></div><div>Markus<br><br></div></div></body></html>