The ShapeDataLayer class provides access to spatial and attribute data stored in a general-purpose database (such as Access).
Assembly: ActualMap (in ActualMap.dll)
This class supports shapes stored in BLOB (binary large object) fields. The internal structure of shapes must conform to the ESRI Shapefile specification.
The extent of database layers is not calculated automatically for performance reasons. If you use only database layers in your application, you should set the
By default, the extent of database layers is set to (-180,90,180,-90) (units are decimal degrees). The coordinate system is set to WGS 1984 (EPSG/SRID code is 4326).
|This class does not support spatial indexes and using it for large databases can affect performance.|