User`s guide

18-3
Changes in Behavior of mapshow and geoshow
In addition to operating faster, the mapshow and geoshow functions now behave slightly
differently regarding their defaults, handles returned, warnings issued, and several other
aspects:
Compatibility Considerations
Default Symbols and Colors
• Point marker type changes from 'X' to '+'
• Point marker color changes from 'black' to 'red'
• Line color changes from 'black' to 'blue'
• Polygon facecolor changes from 'black' to pale yellow
Polygon edgecolor remains 'black'
Contour DisplayType Behavior Changes
• The DisplayType option 'contour' now returns an hggroup handle. The children
of the hggroup are patches. In prior versions, an array of line handles was returned.
• You can specify any contourgroup property as a parameter value pair. In previous
versions, mapshow allowed you to set the LineStyle property, but no other contour
properties.
• Both mapshow and geoshow might return a different number of contour levels by
default than in previous versions, in which you could not specify contour intervals;
in R2006b, you can control contour intervals and levels via the LevelStep or
LevelList contourgroup properties, among others.
• In R2006b, when plotting contours on a regular axes (not a map axes), geoshow
projects the contour lines using a Plate Carree projection; in previous versions it
simply displayed longitudes as x and latitudes as y without doing any trimming or
longitude wrapping.
Graphic Objects and Return Values for Vector Inputs
• Vector coordinate array input (x-y or latitude-longitude pairs) with a DisplayType of
'Line' or 'Point' now generates an ordinary line object instead of a map graphics
line.