Mapping Toolbox

Geographic Computation
Table 9-14 Points

Function	Description
antipode	Compute point on opposite side of globe.
azimuth	Azimuth between two points.
distance	Distance between two points.
elevation	Elevation between two points.
reckon	Reckoning with starting point, azimuth, and range.
departure	Departure of longitudes at specific latitudes.

Table 9-15 Lines

Function	Description
ellipse1	Ellipse defined by its center, semimajor axes, eccentricity, and azimuth.
scircle1	Small circle defined by starting point and arc limits.
scircle2	Small circle defined by its center and perimeter.
scircleg	Display of small circle defined via mouse input.
sectorg	Display of sectors of small circles defined via mouse input.
tissot	Tissot indicatrices projected onto map axes.
track	Connect navigational waypoints with track segments.
track1	Great circle or rhumb line from point, azimuth, and range.
track2	Great circle or rhumb line defined by two points.
trackg	Display of great circle or rhumb line from mouse input.

Table 9-16 Polygons

Function	Description
bufferm	Polygon buffer regions.
polybool	Polygon boolean operations.
polyjoin	Combine polygon segments to a NaN-clipped polygon.
polymerge	Merge polygon segments with abutting ends.
polysplit	Separate NaN-clipped polygon segments into cell arrays.
polyxpoly	Polygon intersections.

Table 9-17 Surface Areas

Function	Description
areaint	Compute spherical surface area of polygon.
areamat	Compute geographic area of matrix elements.
areaquad	Compute spherical area of lat-long quadrangle.

Table 9-18 Geographic Statistics

Function	Description
combntns	Compute all combinations of given set of values.
eqa2grn	Equal area coordinates to Greenwich coordinates.
filterm	Geographic filter for data sets.
grn2eqa	Greenwich coordinates to equal area coordinates.
hista	Spatial equal area histogram.
histr	Spatial equirectangular histogram.
meanm	Mean of geographic points data.
stdm	Standard deviation of geographic data.
stdist	Standard distance of geographic data.

Table 9-19 Navigation

Function	Description
driftcorr	Compute correction for drift.
driftvel	Compute drift speed and direction.
dreckon	Compute dead reckoning positions for track.
gcwaypts	Compute equally spaced waypoints along great circle.
legs	Compute courses and distances between track waypoints.
navfix	Perform mercator-based navigational fixing.
timezone	Set time zone description for longitudes.

Map Appearance and Interaction

Data Operations