Mask Layer

Mask layer could be set to avoid drawing graphic outside the mask extent. Set ¡®SetMaskLayer¡¯ to ¡®True¡¯, and then select a mask layer from ¡®MaskLayer¡¯ list. But firstly you have to have at least one mask layer in ¡®Layers¡¯ list. Only polygon layer could be used as mask layer. ¡®china.shp¡¯ file in ¡®Map¡¯ folder under the software installation path can be used. Open it, and then select it in ¡®MaskLayer¡¯ list. Don¡¯t use very complex polygon layer as mask layer, it will slow down the software obviously.


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