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There are a minimum of 2 files that make up a MapInfo TAB file:
1) TAB (header)
2) DAT/DBF/XLS/MDB/... (attribute data)
If any fields are indexed then there will also be another file:
3) IND (Indexes for fields). This file is locale specific, so a MapInfo-US index file can not be used on a MapInfo-non-US installation. May only apply to char fields?
A mappable TAB file includes two more files:
4) MAP (geography, coordinates, spatial R-tree index, projection parameters)
5) ID (rowid index into MAP file. Present only with mappable tables)
If the data file is an Access database, then there will be an additional file:
AID (Access index to data)
These all have to be < 2 GB (mapinfo limit, not OS-dependant). You will most likely hit the limit with the DAT file first, if you have many fields in your data. Otherwise it may be the MAP file.
Max length of a single field: 255 bytes
Max number of fields: 250
Max number of indexed fields: 30
Max length of record: 4096 bytes
Max number of different styles: 255
Additional low-level information
Also see MITAB library
comments:
About Mapinfo Tab --fedorinoff, Thu, 27 Mar 2008 14:18:51 -0500 reply
I have question about Mapinfo table structure. There is table from Autocad Map 2005 with this structure -------------- table version 300 charset Neutral Definition Table Type NATIVE Charset "Neutral" Fields 23 BLOCKNAME Char (254) ; DWGNAME Char (254) ; LAYER Char (254) ; LINETYPE Char (254) ; ROTATION Float ; STRING Char (254) ; STYLE Char (254) ; X1 Float ; Y1 Float ; col_1 Char (254) ; col_2 Char (254) ; col_3 Char (254) ; col_4 Char (254) ; col_5 Char (254) ; col_6 Char (254) ; col_7 Char (254) ; col_8 Char (254) ; col_9 Char (254) ; col_10 Char (254) ; col_11 Char (254) ; col_12 Char (254) ; col_13 Char (254) ; col_4 Char (254) ; ------------- Table normally opened in mapinfo and browse data, but i cant do any operations with modifieing table: pack, update, structure change. Where is joke? Why AutoCad? Map so cool, and Mapinfo so... especial.
TabFormat
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last edited 8 months ago by fedorinoff
1) TAB (header)
2) DAT/DBF/XLS/MDB/... (attribute data)
If any fields are indexed then there will also be another file:
3) IND (Indexes for fields). This file is locale specific, so a MapInfo-US index file can not be used on a MapInfo-non-US installation. May only apply to char fields?
A mappable TAB file includes two more files:
4) MAP (geography, coordinates, spatial R-tree index, projection parameters)
5) ID (rowid index into MAP file. Present only with mappable tables)
If the data file is an Access database, then there will be an additional file:
AID (Access index to data)
These all have to be < 2 GB (mapinfo limit, not OS-dependant). You will most likely hit the limit with the DAT file first, if you have many fields in your data. Otherwise it may be the MAP file.
Max length of a single field: 255 bytes
Max number of fields: 250
Max number of indexed fields: 30
Max length of record: 4096 bytes
Max number of different styles: 255
Additional low-level information
Also see MITAB library
comments:
About Mapinfo Tab --fedorinoff, Thu, 27 Mar 2008 14:18:51 -0500 replyI have question about Mapinfo table structure. There is table from Autocad Map 2005 with this structure -------------- table version 300 charset Neutral Definition Table Type NATIVE Charset "Neutral" Fields 23 BLOCKNAME Char (254) ; DWGNAME Char (254) ; LAYER Char (254) ; LINETYPE Char (254) ; ROTATION Float ; STRING Char (254) ; STYLE Char (254) ; X1 Float ; Y1 Float ; col_1 Char (254) ; col_2 Char (254) ; col_3 Char (254) ; col_4 Char (254) ; col_5 Char (254) ; col_6 Char (254) ; col_7 Char (254) ; col_8 Char (254) ; col_9 Char (254) ; col_10 Char (254) ; col_11 Char (254) ; col_12 Char (254) ; col_13 Char (254) ; col_4 Char (254) ; ------------- Table normally opened in mapinfo and browse data, but i cant do any operations with modifieing table: pack, update, structure change. Where is joke? Why AutoCad? Map so cool, and Mapinfo so... especial.