Hi Jukka,
Basic data types of dBase III format are :
C (Character) All OEM code page characters.
D (Date) Numbers and a character to separate month, day, and year
(stored internally as 8 digits in YYYYMMDD format).
N (Numeric) - . 0 1 2 3 4 5 6 7 8 9
L (Logical) ? Y y N n T t F f (? when not initialized).
M (Memo) All OEM code page characters (stored internally as 10 digits
representing a .DBT block number).
AFAIK, OpenJUMP uses only C, D and N
For integers, it exports a numeric of length 11 with 0 decimals
For doubles, it exports a numeric of length 33 with 16 decimals
While reading a dbf, OpenJUMP reads column with 0 decimal as integers
and columns with 1 decimal or more as double
That said, dbase format has evolved a lot since version III and binary
integer may exist now,
Not sure that using other data types is a good idea though. In your
case, I don't know if GDAL
looses the "number of decimal places", but this info is all we need to
know if an attribute is
an integer or a double/decimal.
Michaël
Hi,
If I create an attribute of type integer in OpenJUMP and save the layer into shapefile,
GDAL/OGR is reporting that the datatype is "real (11.0)". However, if I reload
the shapefile back to OJ the datatype is still Integer. Do we write the integer datatype
in some odd way or is it GDAL that interprets is wrongly?
-Jukka Rahkonen-
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