FortranGIS Version 3.0

◆ dbfisattributenull()

logical function, public dbfisattributenull ( type(shpfileobject), intent(inout)  hshp,
integer, intent(in)  ishape,
integer, intent(in)  ifield 
)

It returns .TRUE.

if the requested attribute is NULL valued. Note that NULL fields are represented in the .dbf file as having all spaces in the field. Reading NULL fields will result in a value of 0.0 or an empty string with the dbfreadattribute interface. It returns .TRUE. in case of error as well. This procedure is available only with shapelib version 1.2.10 or later.

Parameters
[in,out]hshpshapefile object to query
[in]ishapenumber of shape (record) to query
[in]ifieldnumber of field to query

Definition at line 818 of file shapelib.F90.