User`s guide

15-3
in longitude to overlap on both their eastern and western sides. This case, of course, is
not possible for bounding boxes in the plane.)
Use outlinegeoquad to generate a pair of latitude and longitude coordinate vectors
that define a polygon that traces the outline of a geographic quadrangle. This can be
useful for displaying the quadrangle graphically using geoshow, for example, especially
on a projection where the meridians and/or parallels do not project to straight lines,
because in addition to connecting the four corners outlinegeoquad lets you interpolate
additional vertices along parallels, meridians, or both.
Fixes and Improvements to Function avhrrgoode
Function avhrrgoode has been rewritten to improve its efficiency and to remove a
number of problems and limitations:
• Fixed a spatial referencing problem when a nonglobal region has been specified which
caused locations to be offset by half a pixel.
• The function no longer returns incorrect NaN coordinate values at the equator when
given certain latitude limits that cross the equator.
• The function no longer errors when attempting to read a file name with certain legal
latitude and longitude limits.
• The new version executes at least five times faster.
Compatibility Considerations
• The nonfunctional syntaxes avhrrgoode and avhrrgoode(region) have been
removed from the documentation.
• The function now returns empty when the user-supplied limits are outside data
limits.
• The function no longer permits longitude limits to be specified outside the interval
[-180 180].
• Parameters other than region and filename can be specified as empty to use their
default values.
• In versions prior to R2008a, when reading from the global data set and a smaller
region data set, the size of the outputs differed by one column from each other when
given identical latitude and longitude limits. Now the sizes are the same.