User`s guide

R2007b
16-8
• boston_enhanced_pan.tif
The mapexenhance demo (“Enhancing Multispectral GeoTIFF Images”), which used
several of these images, has also been removed.
Map Axes Now Display Transparent Objects More Easily
It is now much easier to achieve transparency effects from the toolbox by setting the
AlphaData property of an object. Previously, functions axesm, lightm, contourm, and
contour3m set the figure's Renderer property: axesm and lightm set it to 'zbuffer',
while contourm and contour3m set it to 'painters'. You then had to manually reset
Renderer to 'opengl' in order for transparency to take effect.
Now the RendererMode of the figure retains the default MATLAB value of 'auto',
causing MATLAB to select the most appropriate renderer for you; it will use OpenGL
when appropriate, given your AlphaData settings. Using OpenGL not only enables
transparency effects, it also can make use of hardware graphics acceleration capabilities
should they be available.
Compatibility Considerations
If you need a particular map display to look the same as it did in Mapping Toolbox
Version 2.5 (R2007a), in most cases you can just issue the command
set(gcf,'Renderer','zbuffer')
after you construct your map axes. If you are calling contourm or contour3m, issue the
command
set(gcf,'Renderer','painters')
after you call the contouring function.
The consequence of doing this is that you will not be able to use transparency with that
map figure until you reset its renderer to 'opengl' or set its 'RendererMode' back to
'auto', which is its default state.
The arcgridread Function Now Imports Noninteger Data Grids
In previous releases of the toolbox, arcgridread could only import data grids that had
integer values (often of meters or feet). This limitation has now been removed, such that
input grids can contain arbitrary values in decimal notation.