dlg_type: dlg_area
DLG area features represent polygonal features in 2D. These features are actually point features with one x and one y coordinate. This coordinate location may have little utility, as the boundary of the area is specified indirectly through the use of the dlg_linkage{} list attribute. Each entry in this list refers to a dlg_line which, together, form the boundary of the area. Additional attributes assigned to this area are attached to the original dlg_area feature.
There are several attributes specific to area features.
|
Field Name |
Description |
|
dlg_num_islands |
The number of islands or holes within this area feature. Range: 1 - 32000 |
|
dlg_num_linkage_records |
The number of entries in the dlg_linkage{#} list attribute. This list contains references to the line features that define the border of the area. Note: Linkages with a value of zero are not included in this count. Range: 1 - 32000 |
|
dlg_num_points_area_list |
The number of coordinates associated with the linear features necessary to define the border of this area feature. Range: 1 - 32000 |