>I assume from this description that this is a format for vector data, with >the same object types that MapInfo Professional (and bedmates) uses? >
That's correct. This new format holds the same object types as MapInfo and implements a similar RTREE spatial index - the main difference is the use of 64 bit long integers as pointers instead of 32 bit integers. On an NTFS file system this then allows files up to 16 Terrabytes, and on older FAT32 systems up to 4 GB. > >And that those geometric objects are completely described by the GML >standard? > The GML data files defines the type of object, gives it's full geometry and also full data attribution. However GML as used in MasterMap does not define its appearance. Its up to the user to decide this. So our free translator uses a "user definable" style file. For example this might say that a building outline should be Point Size 2.5 and blue, and that the "fill" for the building is style 45, and grey. Regards Bob In message <[EMAIL PROTECTED]>, SCISOFT <[EMAIL PROTECTED]> writes >I assume from this description that this is a format for vector data, with >the same object types that MapInfo Professional (and bedmates) uses? > >And that those geometric objects are completely described by the GML >standard? > >IL Thomas >GeoSciSoft - Perth, Australia > >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:mapinfo-l- >> [EMAIL PROTECTED] On Behalf Of bob young >> Sent: Wednesday, January 11, 2006 6:33 PM >> To: [email protected] >> Subject: [MI-L] 2 GB limit increased to 16 Terrabytes >> >> Dear List >> >> I am pleased to report that By Design have defined and built a spatial >> file format that can be viewed from within MapInfo and can have files up >> to 16 Terrabytes in size. >> >> We have used the R-tree structure defined by Guttman in 1984 and >> implemented support for text, points, lines and regions at the leaf >> nodes. All internal pointers use 64 bit long integers hence the new file >> size. It therefore offers similar performance to native TAB but is not >> limited to 2 GB file sizes. >> >> Our first implementation for this format is for MasterMap of Great >> Britain. We have produced a free translator to load GZ ( compressed GML >> ) directly into the new format. The free translator runs inside MapInfo >> Professional. This process is very quick. It loads over 12000 objects >> per second. National Cover of GB which is about 700 GB of GML ( and 33 >> GB of GZ ) loads in under nine hours ( and produces 60 GB of data ). >> >> We have produced an MBX called MIMIC that converts the new 64 bit format >> to native TAB on the fly, so a MapInfo Professional user can pan and >> zoom on these huge layers just the same as with native TAB. These layers >> can be mixed and matched with native TAB, Oracle spatial and WMS/WFS >> layers with MapInfo Professional. >> >> If users in any other Countries are using GML and are interested in this >> we would very much like to modify the free translator to work with other >> GML datasets. >> >> There are details and free downloads at www.GBplc.co.uk >> >> >> >> Regards >> >> >> Bob >> www.MapsByDesign.co.uk >> >> >> -- >> bob young >> _______________________________________________ >> MapInfo-L mailing list >> [email protected] >> http://www.directionsmag.com/mailman/listinfo/mapinfo-l >> >> >> -- >> No virus found in this incoming message. >> Checked by AVG Free Edition. >> Version: 7.1.371 / Virus Database: 267.14.17/226 - Release Date: >> 10/01/2006 > >_______________________________________________ >MapInfo-L mailing list >[email protected] >http://www.directionsmag.com/mailman/listinfo/mapinfo-l -- bob young _______________________________________________ MapInfo-L mailing list [email protected] http://www.directionsmag.com/mailman/listinfo/mapinfo-l
