Delorme 6 用户手册

Working With GIS 

85 

You can customize the default settings for managing GIS layers. 
To Set GIS Layer Options 
Use the following steps to create default settings for GIS layers. 

1.  Click the Options button 

 on the toolbar. 

OR 

Click the arrow next to the Options toolbar button to open the menu. Then, 
click Options to open the dialog box. 

2.  Click the GIS tab, and then click the Layers subtab. 
3.  Set the following options: 

•  Add imported layers to Workspace–Select this check box to 

automatically add imported layers to the Workspace subtab. 

•  Show imported layers on map–If you selected the above check box, 

select this check box to show layers on the map after they are 
imported to the Workspace subtab. 

•  Show layers added from Manage Layers on map–Select this check 

box to show layers on the map when you add them from the Manage 

Layers dialog box. 

•  Zoom map when centering on points–Use the drop-down list to 

select the zoom level to use when you double-click a point geometry to 
center it on the map in the Attributes subtab Datasheet View. 

•  Default attribute records filter–Use the drop-down list to select the 

default setting for the Show drop-down list on the Attributes subtab for 
layers added to the Workspace. You can manually change the filter 

after a layer is added to Workspace. Options are Mag Region (default), 
All, and Toolbar Select. 

•  Refresh attribute records for Map Region filter–Select this check 

box to automatically refresh the Attributes subtab Datasheet View 

when the map extent changes and Map Region is selected in the Show 
drop-down list. The Map Region filter hides all attribute records whose 
map bounding region (MBR) is not currently within the map window. 

•  Large layer definition (# of geometries)–Type the minimum 

number of geometries a layer must include to define it as a large 

layer. When a layer includes at least that number of geometries, XMap 
will handle the layer differently to improve processing speed. For 

example, the map will not zoom to the location of the geometries and 
the count function for query results is suppressed. The default number 

of geometries for a large layer is 50,000. 

•  Geometry selection color–Click the button to open the Color dialog 

box and click the color for selection highlights on the map. Select 

geometries with the Selection Tool 

 in the toolbar or by selecting 

records on the Attributes subtab in datasheet view.