Polygon Map Properties

Polygon Map tab:

Object type and name:

Polygon Map "polygon map name": the polygon map is an editable source map.

Dependent Polygon Map "polygon map name": the polygon map is the result of an operation.

When you click this flat button, the polygon map will be (re)opened.

Coordinate system:

The name and the description of the coordinate system used by this polygon map are listed.

Boundaries of map:

The coordinate boundaries of this map are listed as (MinX, MinY) and (MaxX, MaxY).

Domain:

The name of the domain that is used by this polygon map is listed. Also the description of the domain is listed.

Value range:

In case this map uses a value domain, the minimum and maximum values that can be stored by this map are listed. This is also called the value range of the map.

Precision:

In case this map uses a value domain, the precision of the values that can be stored by this map is listed.

Attribute table:

In case this map uses a class or ID domain, and the map or the domain has an attribute table, then the name of the attribute table is shown.

Select this check box to link an attribute table to this polygon map, or select this check box to create a new attribute table for this polygon map (click the create button).

Definition:

For dependent maps: the expression by which the object was created is listed, i.e. the object definition.

Topology:

"Polygon map has full topology": the structure of the polygon map is topological, i.e. each polygon boundary defines both the boundary of the polygon to the left and to the right of that boundary. The polygon map has for instance been obtained by polygonizing segments that were digitized in ILWIS.

"Polygon map does not have full topology": the structure of the polygon map is non-topological; currently this means that every polygon is enclosed by a polygon boundary of its own. The polygon map has for instance been obtained by polygonizing segments that were imported from DXF.

For more information on Topology, refer to Segment editor : Polygonize or Segments to Polygons : dialog box.

Number of polygons:

The number of polygons as counted by the system in this polygon map; this includes some additionally counted polygons for the outer polygon(s) and for islands.

General tab:

Object type and name:

Polygon Map "polygon map name": the polygon map is an editable source map.

Dependent Polygon Map "polygon map name": the polygon map is the result of an operation.

When you click this flat button, the polygon map will be (re)opened.

Location:

The path and directory where this object is stored.

Object date and time:

Date and time when this polygon map was last changed.

Object size:

Total size of the polygon map on disk in bytes (.MPA and .MPAP#, .MPAT#).

Read only:

Select this check box to make the polygon map read only. Clear this check box to make the polygon map changeable.

Description:

Description of the object; freely editable. The description of a map appears in the title bar of a map window when the map is displayed. Furthermore, the description is visible on the status bar of the Main window when moving the mouse pointer over the map in a Catalog.

Dependency tab (for dependent maps):

Object type and name:

Dependent Polygon Map "polygon map name": the polygon map is the result of an operation. When you click this flat button, the polygon map will be (re)opened.

Definition:

The expression by which the object was created is listed, i.e. the object definition.

Up-to-date or not:

Lists whether this polygon map is up-to-date or not. If not, the name of the object which was changed last is shown including that object's date and time.

Depends on:

In a tree view, the names of the objects are listed on which this polygon map depends.

Calculate:

When only the object definition file of this polygon map (.MPA) exists:

• click this button to (re)calculate the data files (.MPAP#. and .MPAT#) of this polygon map by (re)executing the definition of this map.

Make Up-to-Date:

When the polygon map is not up-to-date anymore,

i.e. when one or more objects on which this polygon map depends have been changed, and when the object definition file (.MPA) as well as calculated data files (.MPAP# and .MPAT#) of this polygon map exist:

• click this button to check all objects on which this polygon map depends, see if these are up-to-date, if not, check all objects below, etc.,
• recalculate all changed objects on which this polygon map depends, and finally recalculate the data files of this polygon map using all new changed objects.

Release Disk Space:

When the object definition file (.MPA) and calculated data files (.MPAP# and .MPAT#) exist:

• click this button to delete the data files of this polygon map.

The expression by which this dependent polygon map was created remains stored in the object definition file, so this polygon map can always be recalculated.

Break Dependency Link:

Whether this polyogn map is Up-to-Date or not:

• click this button to break the dependency link between this polygon map and the objects on which it depends. This polygon map will become an editable source object.

Do not break the dependency link if you wish to be able to update this polygon map in a later stage on the basis of changed input objects.

Used By tab:

Object type and name:

Polygon Map "polygon map name": the polygon map is an editable source map.

Dependent Polygon Map "polygon map name": the polygon map is the result of an operation.

When you click this flat button, the polygon map will be (re)opened.

Used By:

In a tree view, it is listed by which other objects this polygon map is used.