Add Line_height as a valid attribute in v.to.db

[geografik]

Imported kml files that include elevation data are structured generally as shown below in GRASS (this is an example of a contour line):

east, north: -79.7630759471, 39.0874586371 DBT@corH:

Type: Line Id: 885 Length: 275.746 Line_height: 698.602997 Layer: 1 Category: 885 Driver: sqlite Database: /Users/sesMacBook/grassdata/KML/corH/sqlite/sqlite.db Table: DBT Key_column: cat Attributes:

cat: 885 cat_: 885 tessellate: -1 extrude: -1 visibility: -1

Elevation data is maintained in the Line_height field which is not a recognized attribute, and therefor precludes any further use of these data in GRASS - beyond simple display and labling. 3D analysis, for example, is not possible. The suggested improvement to v.to.db would add Line_height to the list of attributes considered in this module so that the elevation data could become part of the recognized feature attributes and be useful in other modules.