CARIS Bathy DataBASE Server : Support Files : HIPS and SIPS Support Files : INFO file : Additional Attributes : Invalid Attribute Values
 
Invalid Attribute Values

If the data being imported contains invalid values (for example, points/nodes without elevation values), the info file can be used to catch these values and exclude them from the import. When the importer encounters an invalid value, it will skip that point/node and move on to the next one.

To use this function, you must list the values for each attribute that you want the importer to recognize as invalid. The following lines are used to list invalid values:

<Invalid_Values>
<Value value="-9999"/>
</Invalid_Values>

These lines would be added to the group of lines for each attribute. Multiple values can be listed within the opening and closing lines for the parameter. Below is an example of an invalid value specified for the Z attribute.

<!-- The information required to decode the z coordinate -->
<Z_Coord>
<!-- The zero based column index of the z coordinate -->
<Col_Index value="2"/>
<!-- The starting position of the z coordinate. -->
<Start_Pos value="0"/>
<!-- The width of the z coordinate. -->
<Width value="0"/>
<Invalid_Values>
<Value value="-9999"/>
</Invalid_Values>
</Z_Coord>

If you use invalid values that have multiple representations (such as 0, 000 and 0.0), each representation must be reflected in the INFO file as the values are treated as strings.