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GeoPQL, fully
researched and developed by IPT srl in collaboration with CNR (National
Council for Scientific Research Rome, emerges as the first European stand alone extension for
the ESRI ArcGis 8.x suite of
applications. It is a
system that has been created
according to ESRI standards, from which it inherits the data format and
numerous functions, with a user friendly graphic interface for quick and
easy use. Entirely created on the basis
of the technology used by the same ESRI developers (ArcObjects) it combines the power of
calculation with simplicity
of use. Indeed, GeoPQL is a
system for the formulation of
highly specialized visual queries that are perfectly integrated
with the ESRI system, its strong point being simplicity of use and
excellent result performance
.
GeoPQL permits the making of increasingly complex queries with
the minimum waste of time and the certainty of true and accurate results. All the basic surfing and graphics
functions available in ArcGis conform to the ESRI standard, in addition to
proprietor functions such as
clear and highly powerful
geoprocessing (a development on that already existing in
ArcGis), visual analysis of
the graph in real-time, a sql-like decryptive proprietary language of the planned query,
etc.
Thus, the GeoPQL finds its database in the ESRI
geodatabase and format layer from which it inherits its
characteristics.
In this way, the system allows queries to be made, outlining them by means of the drag and drop of symbolic graphic objects, and their resulting association with the appropriate layers of the ArcGis through an efficiently conducted system. In this way, the query is then described by a series of spatial relations, encoded inside the GeoPQL, displayed to the user by means of interactive lists that are continuously updated during the design stage. The choice of a relationship enables the illumination of the two objects concerned. At the end of the design it is possible to modify the object both as regards its spatial position and its type of association, including any restraints that have been imposed by specific tools for such purposes. The processing of the query takes place through the visual selection of a target, that is, the objective of the research which is described in detailed SQL-like language and with the display, in preview, of the results that can be displayed for subsequent processing in ArcGis. for any question geopql@iptsat.com
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The layers in ArcGis are completely
managed in the GeoPQL system by means of a system of symbolic association
with graphic objects (O.G.S.) points, lines and polygons on which it is
possible to place alphanumeric restraints both on geographical