Release Notes


Changes in the Maps Module

The Maps module has been enriched with the following functionalities:


Incompatibilities

These major additions to the map module did unfortunately cause some backward incompatibilities with JViews 2.0.


Map Builder

The old IlvMap application that was dedicated in JViews 2.x to the conversion of map data loaded from an OGDI Map Server to IVL files has been turned into a fully functional map builder.
It is now located in <JViewsDir>/bin/ilvmap.
This map builder can be used to create IVL files with data imported from OGDI, Shapefiles, DTED files, and CADRG files.
It supports Load-on-Demand as well as scale visibility filters.


Beans

In addition to the Beans of the JViews Framework, some specific beans dedicated to the creation of map applications have been added.
These beans are in the package ilog.views.maps.beans.
You will find in this package:


The Reader Framework

To provide a common way of handling map readers, a reader framework has been developed. This framework includes a new class for cartographic objects (the IlvMapFeature class located in the ilog.views.maps package), a set of predefined map geometries (located in the ilog.views.maps.geometry package), and a set of predefined map attributes (located in the ilog.views.maps.attribute package).
The translation of cartographic objects into graphic objects is handled by renderers. The predefined renderers are located in the ilog.views.maps.rendering package. Finally, the ilog.views.maps.format package has been created. This package contains all the predefined implementations of map readers.


Integration of Map Readers in the Library

Now that JViews Maps contains a reader framework, The Shapefile Reader, the DTED reader, and the CADRG reader are now integrated in the library. They are in the following packages, respectively: An IlvOGDIFeatureIterator class has also been added to facilitate the use of an OGDI Map Server. It is located in the
ilog.views.maps.format.ogdi package.


Load-On-Demand

To support the management of very large maps, a load-on-demand framework has been added to the JViews Framework in the ilog.views.tiling package.

Predefined implementations of load-on-demand exist for the CADRG format and for OGDI.


Scale Visibility Filters

To control more easily the scale of the map views, the IlvScaleController class has been added to the ilog.views.maps package.

The class IlvScaleVisibilityFilter has been added to the same package to automatically restrict the visibility of a layer in a scale range.


New Projections

The following projections have been added to the ilog.views.maps.projection package:

A support for datum conversion has been provided in the library, including a conversion algorithm based on the Molodensky formula.


Integration of JViews Maps with Oracle Spatial

A Sample showing how to integrate JViews Maps with Oracle Spatial is located in the <JViewsDir>/demos/maps/oracle directory. It shows:

The classes to integrate JViews and Oracle spatial are provided in the ilog.views.maps.format.oracle package.


Incompatibilities

Since they have a general purpose, the following classes have been moved from the ilog.views.maps.projection package to the ilog.views.maps package