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IxLatLow


Unit:SDL_geodb
Class:TGeoDB
Declaration:property IxLatLow[ix: longint]: TIxLLRec;

In order to find database entries quickly TGeoDb maintains five indexes offering an ordered access to the latitudes, longitudes and item IDs of the database entries. Since a database entry may contain more than one point (e.g. country borders are polygons with many points), individual indexes are maintained both for the lowest and highest latitudes/longitudes.

The read-only array property IxLatLow provides an ordered list of the lowest latitudes of all database entries. The parameter ix specifies the number of the index entry and may take values between 1 and NumEntries. The property returns the latitude and the corresponding entry number of the database.



Last Update: 2023-Dec-13