Hello Tim, Managing so many raster images will be difficult but not impossible. Some notes:
1) Creation - if you created the images from MapInfo, you could reduce the number of raster tiles significantly by using larger images. Just doubling the size will reduce your count by a factor of 4. Also, if your generator software is your own MapBasic program, you can query the corners of the image using MapperInfo() and write a TAB file (as a text file) with the registration information. Alternatively, if the names contains the coordinate, you can batch process all files in a directory (using the Windows API FindFile() function came up on the list recently), scan the file name for the coordinate information, and write the TAB file (again as text). You might also want to build a table to act as a catalogue which may help with handling the data (below). 2) Conversion - you note below suggests that MapInfo was not used to create the images as I don't think it ever writes images that cannot be loaded back again. There are a number of conversion tools around - many free. Try Irfanview (www.irfanview.com) which has some excellent batch processing capabilities. 3) Handling - You probably know already that you will not be able to load so many tiles in one go. You could look into grouping tiles into seamless rasters, or consider a special MapInfo Pro handler which traps view changes and opens/closed the appropriate tables (might be a bit slow). Alternatively, you could have a button to manually request the tiles for the current view. I have about 200,000 tiles on my system which are used to implement a cheap but fast web mapping server. Other difficulties I have found include transferring files from system to system. The number far exceeds the limits of WinZip and many installer and media types have file limits which are normally never a problem. Even copying files seems to take forever as there is a per-file overhead and inserting a file into a heavily-loaded directly takes much longer than copying in to an empty one (on NTFS anyway). Good luck! Regards, Warren Vick Europa Technologies Ltd. http://www.europa-tech.com -----Original Message----- From: Tim Smith [mailto:[EMAIL PROTECTED] Sent: 06 July 2004 11:03 To: Photogrammetry GIU Cc: [EMAIL PROTECTED] Subject: RE: MI-L Registering *lots* of raster maps Just found that MapInfo doesn't support 16-colour RLE bitmaps! Will have to convert all my tiles to 256-colour. -----Original Message----- From: Photogrammetry GIU [mailto:[EMAIL PROTECTED] Sent: 06 July 2004 10:40 To: Tim Smith Subject: RE: MI-L Registering *lots* of raster maps Tim OK, what is the raster data format, number of rows and columns and pixel size? With that info, it will be easy Tony >>> "Tim Smith" <[EMAIL PROTECTED]> 06/07/2004 10:31:08 >>> Tony, Not specifically OSGB - but that is one of my sets. File names are like 46250975.L00 The first four digits are the easting in 100s of meters and the second four digits are the northing in 100s of meters i.e. 462500E 97500N The tiles are of a fixed size. Kind regards Tim -----Original Message----- From: Photogrammetry GIU [mailto:[EMAIL PROTECTED] Sent: 06 July 2004 10:20 To: Tim Smith Subject: Re: MI-L Registering *lots* of raster maps Are you in OSGB and , if so, do your maps have titles like st1234 and do they have a fixed tile size. If so I can adapt an mbx we use here for registering raster maps Tony >>> "Tim Smith" <[EMAIL PROTECTED]> 06/07/2004 09:57:05 >>> Hi List, I am new to mapinfo and I've just managed to register a raster image and create a table for it. I have got lots of raster 'tiles' that make up an entire map. Problem is, I have over a million of them! Obviously I can't manually 'register' all of these maps - I'd be doing it for the rest of my life! What's the best way to do this? If I wrote a tool to automatically create the tables, can mapinfo dynamically choose which tables to display? - because my geoset isn't going to be very happy with 1,000,000 tables. Could I create one table with lots of raster images in it? Our old mapping system dynamically loaded the maps it needed to display based on the filename. The filename contains the easting and northing of the bottom left corner of the image. As far as I know mapinfo can't do this - you need three reference points per image. Besides - I still need to register *all* of the maps. I can't 'stitch' them together. This is too time consuming as we have several sets of a million tiles! I'm thinking that I might need to dynamically create a table and load it whenever the map moves or is zoomed. I'd use MapX to display the maps and I can then do dynamic table manipulation. Damn this is tricky. Thanks for any help listers. 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