igds_type: igds_point
Strictly speaking, the IGDS file format does not support point data. However, for easier interoperability with other formats, the IGDS reader and writer define a synthetic IGDS type for point data.
Such features have only a single coordinate, and are stored in an IGDS type 3 element1 as a zero length line with the start and the end point the same. When the IGDS reader encounters such an element, it assigns an igds_type of igds_point. If the IGDS reader encounters a type 3 element with a different start and end point, it will assign an igds_type of igds_line.
There are no attributes specific to this type of element.