The Show on Map function is located on screens of the Census 2000 Demographic Profiles, EPA Regulated Sites, and USGS Geographic Names databases. Clicking on the Show on Map button will take you to the Show on Map screen and allow you to choose the manner in which you view the data. You may select Show Current Record, or Show All Records.
The Show on Map operation will be successful only if the database records have a matching map object in MARPLOT®. If a record does not have a matching map object, MARPLOT will generate the following error message - One or more of the objects to be shown were not found. All the database records in LandView® 5 should have a corresponding MARPLOT map object. If you do encounter this message, please provide details to the LandView support staff.
When MARPLOT finds a record, it will select it (MARPLOT places tiny red squares around the border of selected polygons, or around the symbol of selected point objects). For polygon objects like states, counties, census tracts etc., MARPLOT will zoom in or out so that the selected object(s) just fits the screen.
Show Current Record
To view a single record from the results of the query select Show Current Record by clicking on the circle to the left of Show Current Record. Clicking on the Show on Map button activates the MARPLOT mapping engine, which will then zoom in and place tiny red squares around the site.
Show All Records in the Found Set
This function will show the map objects for a collection of records, typically, as the result of a query. Whenever this option is chosen, MARPLOT will zoom in or out to fit all the selected objects on the screen. For example, you may want to look at how all the EPA sites in Wilmington, Delaware. To find all the sites in Wilmington you would perform a Find.
Choosing Show All Records in the Found Set will cause MARPLOT to map all the EPA sites in Delaware, but highlight only the sites that are located in Wilmington by placing tiny red boxes around the borders to highlight them. If MARPLOT cannot find one or more of the map objects in the collection, it will tell you so. Nevertheless, it will select and show the objects it does find.
Make all other objects on this layer invisible
When used with either the Show only records or Show All Records this function allows MARPLOT to show one map object or a collection of map objects
while hiding any map objects that are not a part of the found collection
In this instance MARPLOT does not select the objects, but rather hides all objects on the layer that are not in the collection. Therefore, in the example above only the 74 sites that were found in Wilmington would be shown, and all other EPA sites in Delaware would be hidden. If MARPLOT cannot find one or more of the map objects in the collection, it will tell you so. Nevertheless, it will show the objects it does find.
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