Hi, I'm guessing this is because the DBF format ESRI decided on for aspatial attribute data in shapefiles does not have an integer datatype
(sse: http://www.dbase.com/knowledgebase/int/db7_file_fmt.htm) So an int field gets read into a generic numeric field in the DBF file, rather than an int. Brent Wood --- On Thu, 11/25/10, Zoltan Szecsei <[email protected]> wrote: From: Zoltan Szecsei <[email protected]> Subject: [gdal-dev] Data types change converting from MID/MIF to SHP To: "gdal-dev" <[email protected]> Date: Thursday, November 25, 2010, 1:04 AM Hi, Here's a strange one that hopefully can be overcome quickly. I'd be grateful for any assistance with this problem. Kind regards, Zoltan I have a MID/MIF file combination with: COLUMNS 5 FEAT_TYPE_ integer (5) GID integer (10) ENTITY_NAM char (50) GEOMETRY_T char (5) AUD_MOD char (5) DATA yet as a SHP file, the two Integer fields become Real 11.0 - yes, both 11.0 I have used both QGis 1.5.0 and an old MapInfo Imutgui.exe to do this conversion, and I get the same results. Typical MID file entries are: 391,,,LINE,A 391,7553476,32986740,LINE,E 391,,,LINE,A 391,,,LINE,A 402,,,LINE,A 391,,,LINE,A 391,7552723,33180873,LINE,E 391,7553846,33193702,LINE,E 398,,,LINE,A 402,,,LINE,A 402,,,LINE,A 391,,,LINE,A 402,,,LINE,A 402,,,LINE,A 391,,,LINE,A 391,,,LINE,A 391,,,LINE,A 398,8181664,#017:1968,LINE,E 391,7586152,40306383,LINE,E 391,7645575,33201757,LINE,E 391,7586151,40306441,LINE,E 391,7586003,40307075,LINE,E 399,8396096,#017:1784,LINE,E -- =========================================== Zoltan Szecsei PrGISc [PGP0031] Geograph (Pty) Ltd. P.O. Box 7, Muizenberg 7950, South Africa. 65 Main Road, Muizenberg 7945 Western Cape, South Africa. 34° 6'16.35"S 18°28'5.62"E Tel: +27-21-7884897 Mobile: +27-83-6004028 Fax: +27-86-6115323 www.geograph.co.za =========================================== ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1170 / Virus Database: 426/3275 - Release Date: 11/23/10 _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
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