MapInfo should definitely open a grid with up to 2^16 rows or 2^16 columns, but I'm not brave enough to try and create a grid with 2^16 rows _and_ 2^16 columns (ie. 4 x 10^9 cells for a size of 8GB++).
Beyond that you may run into problems depending on the grid format being used, although MapInfo's grid engine does use 4 byte ints for specifying rows and columns. And its likely that display (ie. read) performance will be pretty poor as grids get very large (especially so for mig format). Best Regards, Martin Higham Avantra Geosystems ph (61 3) 8504 0428 0425-730-428 fx (61 3) 9596 7997 www.avantra.com.au > -----Original Message----- > From: Jaromir Svasta [mailto:[EMAIL PROTECTED] > Sent: Monday, 1 March 2004 21:25 > To: Mapinfo-L > Subject: Re: MI-L Add to menu in MapInfo and capacity of MapInfo > > > And what about grid size limitation - does someone know what is the limit > for MIG files? I found out that MI is unable to open large grids (tens of > MB in size). > > Jaromir Svasta > > On Mon, 1 Mar 2004 10:26:58 +0100, Uffe Kousgaard <[EMAIL PROTECTED]> > wrote: > > > Hi, > > > > The upper limit is 2 GB for TAB files. With 1 million polygons, that > > leaves appr. 2000 bytes per polygon, which is sufficient if your > > polygons doesn't have too many vertices. As many as 100 vertices per > > polygon may be possible, but try it first with some sample data of > > yours. > > > > Kind regards > > > > Uffe Kousgaard > > www.routeware.dk > > > > ----- Original Message ----- > > From: "Mehmet ALKAN" <[EMAIL PROTECTED]> > > > > 1) What is the capacity of MapInfo on a one layer. (For intansce Ä have > > 1,000,000 polygon in one layer, MapInfo does support?) > > > > > > > > --------------------------------------------------------------------- > > List hosting provided by Directions Magazine | www.directionsmag.com | > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > Message number: 10644 > > > > --------------------------------------------------------------------- > List hosting provided by Directions Magazine | www.directionsmag.com | > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > Message number: 10645 > > --- > Incoming mail is certified Virus Free. > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.587 / Virus Database: 371 - Release Date: 12-02-2004 > > --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.587 / Virus Database: 371 - Release Date: 12-02-2004 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 10646
