DeLorme XMap 7 GIS Getting Started Manual page 6

Wizard to connect to the ArcSDE database. You must provide the server name on which
the ArcSDE installation resides, the port # (instance) of ArcSDE on the server (typically
5151), and the login name and password. When you have a connection to the ArcSDE
instance, you can select available databases and use the Import Wizard or Bulk Importer to
import layers from that database.
Spatial Queries
Spatial queries allow GIS users to ask direct geographic questions about how GIS data is
spatially related. For example, "Which towns are located within a watershed?," "Which
parcels contain toxic point source locations?," "Which rivers are within 1,000 meters of a
road?," "Which cities are within 100 miles of a selected city," and so on. Spatial queries
combined with attribute queries allow you to uncover complex patterns between spatial
data layers and are a fundamental strength of a GIS. Note: XMap Professional users can
run spatial queries but cannot create them.
Buffering
Use the Buffer tool to build polygon geometries, including zero and negative buffers,
around existing geometries in a layer. The size of the buffer polygons is determined by
a user-specified linear distance around the edge of the geometries in the existing layer.
The new polygon geometries are a merged combination of the original polygons and the
buffer polygons. Buffering is often used in GIS spatial analysis when proximity issues are of
concern, such as site planning or risk assessment.
Multiple Classifications
XMap-compatible DeLorme OpenSpace databases support the storage of more than one
classification against a GIS layer. The ability to create and store multiple classifications
against a layer is particularly useful for rapid analysis of the data in the layer. Once the
classifications are created, you can quickly switch between them for comparison to
discover trends in the data, rather than recreating each classification and applying it each
time. There is no limit to the number of classifications that can be stored against a layer, but
only one classification can be active at a time. Like queries, classifications are transferred
with a layer when it is duplicated or exported to an OpenSpace GIS file format.
Note: XMap Professional users can view layer classifications but cannot create them.
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