Mapping Toolbox

Manipulating Vector Data

The Mapping Toolbox enables you to manipulate, combine, and separate vector geodata in a variety of ways. This section describes some useful functions for conditioning, selecting, and transforming vector geodata.

Repackaging Vector Objects	Separating and combining NaN-delimited vectors
Matching Line Segments	Forming closed loops that can be represented as patches
Geographic Interpolation	Linear point interpolation on the sphere and spheroid; adding detail to lines manually
Vector Intersections	Computing where small circles, rhumb lines, and circles intersect
Polygon Area	Computing the areas of polygons on the sphere and spheroid
Overlaying Polygons with Boolean Logic	Performing geometric intersections of polygons and obtaining logical answers
Cutting Polygons at the Date Line	Working around the discontinuity in longitude that happens at 180 degrees east/west
Building Buffer Zones	Constructing distance contours around map features for analysis and display
Trimming Vector Data to a Rectangular Region	Clipping away line and polygon coordinates that lie outside a region of interest
Trimming Vector Data to an Arbitrary Region	Using a data grid to define regions of interest and clip vector data to them
Simplifying Vector Coordinate Data	Eliminating visually redundant coordinates to remove unnecessary detail, and to speed and stylize map displays

Converting Time Notations

Repackaging Vector Objects