Marcos Duarte wrote: > It is simple: for an image shown in the screen I just want to click on > an image point (pixel) and get the coordinates of that in meters, > using a given transformation I obtained before in a calibration > procedure (where I digitize points in an image I know the coordinates > in the real space), > What I meant is that I don't need to apply this transformation to the > image to produce its transformed bitmap (but if I can do that would be > nice).
very similar to what I need to do. In my case, I need to work with raster maps -- the I don't want to warp the image at all, but I want to be able to work with the map in natural coordiantes . example: I load a raster map in the mercator projection. It is a big raster, and I want it displayed as is (except for zooming and shifting). But I want to be able to click on it and get the coordinates of the point in la-long, and be able to draw stuff on top of it in lat-long. I can provide the transform from pixel-> lat-long, and from lat-long->pixel. So the trick is to draw the image itself untransformed, but everything else transformed (to match the image). My plan, with the old FC, was to have a "base layer" class. This class would provide the transform(and reverse transform) from "world" coordinates to "transformed" coordinates (and back). It would also optionally draw something, in this case an image. I can't just drop the image in as a regular object, because I don't want the transform applied to it, though it does still need to be zoomed and scaled to pixel coordinates. Matthias, can this be done with FC2? > If it is still not clear, don't worry, fc can/will do that! well, I'm a bit confused as to how. > I hope I can help you in some way. yes, -- it's nice to have someone else doing something similar. let's see what Matthias suggests. -Chris -- Christopher Barker, Ph.D. Oceanographer Emergency Response Division NOAA/NOS/OR&R (206) 526-6959 voice 7600 Sand Point Way NE (206) 526-6329 fax Seattle, WA 98115 (206) 526-6317 main reception [EMAIL PROTECTED] _______________________________________________ FloatCanvas mailing list FloatCanvas@mithis.com http://mail.mithis.com/cgi-bin/mailman/listinfo/floatcanvas
