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Home GeoPack GeoDB Methods RetrievePolygon
See also: AddBorder, AddCity, AddLake, AddRiver, AddRoad, AddRoute, TgdbPolygon 

RetrievePolygon

Unit:SDL_geodb
Class:TGeoDB
Declaration:function RetrievePolygon (DBEntry: integer; var Polygon: TgdbPolygon): boolean;

The method RetrievePolygon retrieves the corresponding polygon data of database entry DBEntry. The function returns TRUE if such data is available (i.e. the property Data[DBEntry].ItemKind belongs to one of the following types: gitBorder, gitRiver, gitRoad, gitRoute, gitCity, or gitLake).

The polygon data is returned in the open array Polygon.

Hint: Please note that the number of polygon points is available via the property Data[DBEntry].NumPoints.

Example: This property is used in the following example program (see http://www.lohninger.com/examples.html for downloading the code): geodata


Last Update: 2023-Dec-13