MapJunction supports three different ways to view map layers in 3D.
- OpenGL If OpenGL bindings have been installed
you can see the map layers in 3D directly in the applet.
This is the best option if you have a low bandwidth connection.
The only additional data downloaded versus 2D viewing is the elevation information.
The other advantage is that you can interactively change attributes of the
map layers and see the results.
The disadvantage is only a small location can been seen at a time.
- VRML A location can either be opened directly
into VRML viewer or saved in a zip file for importing into a 3D editor.
This options supports display of all map layers in
a VRML file.
This option exploits the Geographic extensions to VRML to
allow you to fly over an entire location interactively.
For now only raster layers are supported. For more information on GeoVRML
visit www.geovrml.org.
OpenGL
To use OpenGL within MapJunction you need to first install the OpenGL Java
bindings for your platform.
We are using the bindings from www.jausoft.com
. Here is the
installation page.
To use OpenGL inside of MapJunction you pick "Switch to 3D Mode" from the
3D sub menu.
VRML
You need to have a VRML plugin installed in your browser. We have tested
with Cosmo and
Cortona.
You can create any VRML views you want inside of MapJunction from the VRML
sub menu on the 3D sub menu.
Here are two samples. Click on the images to view the files.
Building outlines on top of the 1995 Color Orthophoto.
Building outlines on top of a 1775 historic map.
GeoVRML
In addition to a VRML plugin you must download and install the
GeoVRML Run-Time to use GeoVRML with MapJunction.
All of Boston at 1 ft. per pixel resolution. Taken in 1995.
1 meter per pixel infrared picture of Boston in 1991.
