Vector data
Vector data is data with a one-dimensional domain unit, with at least one feature attribute and one or more other attributes for the same domain unit.
A feature attribute can refer to one (point data) or a sequence of elements (arc/polygon data) per entry.
The GeoDMS supports the following vector types:
- point: point data, the feature attribute contains one coordinate per entry.
- arc: arc data, the feature attribute contains at least two coordinates per entry.
- polygon: polygon data, the feature attribute contains at least three coordinates per entry.
It is important to know the coordinate system of your vector data, as they may effect the results of functions like arc_length and connect_info.
Vector data in GeoDMS applications can be read from the following formats:
- ESRI Shapefile (point, arc, polygon)
- GeoPackage (point, arc, polygon)
- ASCII Files : CSV (point) and XML (point, arc, polygon)
- FileGeoDatabase (point, arc, polygon)
- PostgreSQL PostGIS (point, arc, polygon)
- FSS files
The GeoDMS contains multiple functions to calculate with the vector coordinates, see mainly the Geometric functions