Creation of line object |
The line object of a digital map contains coordinates of two and more vertexes. The line object can be closed or non-closed, to have some constituents (subobjects), spatially to be connected to other objects of a map and is logically connected to one or several records of the external database. Depending onto its type line object can be created as one of following: - as an object of arbitrary configuration; - as a horizontal, rotated or complex rectangle; - as a circle of fixed or arbitrary radius; - during a semi-automatic vectoring (tracing) of a raster; - is loaded (coordinates) from a text file; - is entered (coordinates) from the keyboard; - as a parallel line (tube) with an axis along a line or along the left edges; - as an envelope or smoothing spline; - creation of objects group by coordinates from the file.
|