The information is correct, but there is an alternative to chopping one large image and this is resampling so the coordinate system of the images match the coordinate system of your vector layers (another reason to work in one coordinate system). You can perform this resampling with at lot of different tools; e.g. Idrisi for Windows, WinChips and Geographic Transformer form BlueMarble. The last supports Mapinfo raster TAB registration files as input (but consider an alternative on NT 3.51, because it looses the registration code at close) and are easy to use. With a accurate image registration and resample, it's possibly to minimize the problems, but there will always be small displacments and there is a risk of white lines/areas without rasterinformation between the images. Ole Gregor, Viborg Amt (County), Denmark [EMAIL PROTECTED] TLF. (+45) 87271307 > -----Original Message----- > From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]] > Sent: Monday, January 11, 1999 7:05 PM > To: [EMAIL PROTECTED] > Subject: MI Re: Multiple Raster images > > > > > IDS <[EMAIL PROTECTED]> > > We have registered 10 adjoining raster images in non earth feet. > > These have been susequently digitized. When all the raster > > together with the vector are opened and zoomed into the edge of > > the raster images, the vector of the adjoining raster image does > > not appear to fall on the raster image (appears shifting). > > > > Any printout of the 10 raster vector together leads to the same > > shifting problem. > MapInfo displays raster images without any intermediate processing. > If a raster image is displayed in a map window, and its registration > information shows that the image rotated from the map's coordinate > system, it rotates the map's coordinate system (and any vectors) to > match. Furthermore, if you display other images that are rotated > with respect to the first image, it will display the other images > incorrectly. > The only way you can guarantee that several images aren't rotated with > respect to each other is if all of them came from a larger image that > you subsequently "chopped up". Otherwise, you're pretty much > guaranteed to have the problem you described. > Hope this helps > ================================================== > Spencer M. Simpson, Jr., GIS Developer > Baltimore Metropolitan Council -- MetroMapping > http://www.baltometro.org/metromapping.htm > ---------------------------------------------------------------------- > To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and > put > "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED] > ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
