Anyone know where to get the tool by Kevin Mahoney listed below? I have a collection of ~2000 rasters that I would like to combine using a seamless table.
Thanks, Jay Russell _______________________________________________________________________ Thats exactly what MapInfos seamless layers do!!! A MapInfo seamless table contains the extent of each base table in a "parent" table and the name of the table. If the seamless layer represents your raster images then this is the bounding rectangle of the image and the file storing the image.It works for raster tables and for vector tables. It is also the way to overcome the 2 GB file limit of MapInfos MAP file. ie by breaking a large area into sub areas each less that 2 GB you could map any size until the parent table is itself 2 GB in size. When you zoom to any area the MBR ( minimum bounding rectangle ) of the screen is passed to the spatial index of the parent table and only those images that intersect the screen are opened. These tables that intersect the screen are referred to "BASE" tables. If you tried to program this yourself I think you would not get as good a performance as the MapInfo seamless layer. We have used this with 10000 ratser images in base tables of the one seamless layer and performance is the same as opening 1 table! MapInfos spatial index means that you do not have to compare each file to see if it is on the screen. If you get any problems getting this running with your own images please get back to me and I'll help you get it going. We find the best tool to create the seamless layer is Kevin Mahoneys tools written several years back. Kevin was a support engineer with MapInfo and wrote some fantastic tools. He was also the best presenter I personally have ever seen! Regards Bob www.mapsbydesign.co.uk >Hi all, > >I�m looking for a tool, which opens tables corresponding to the actual >coordinates of a map window? > >To explain my problem: I have about 4000 orthophotos ? and don�t know if >it�s a good solution to put them all in a seamless map (performance?). so i >thought, the only way is to write a mb-tool which reads in the actual center >coordinates of the map window, looks in a reference-table (which has the >areas and the names of the corresponding photo-filenames) via searchpoint,? >and then opens the photo. > >Is this the right way, or does anybody have a different solution ? > >Thanks > > > >Karl Acs > > > > --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12650
