Vector Data

Analyze and transform point, line, and polygon data

Functions

`closePolygonParts`	Close all rings in multipart polygon
`extractfield`	Field values from structure array
`interpm`	Densify latitude-longitude sampling in lines or polygons
`intrplat`	Interpolate latitude at given longitude
`intrplon`	Interpolate longitude at given latitude
`isShapeMultipart`	True if polygon or line has multiple parts
`linecirc`	Intersections of circles and lines in Cartesian plane
`circcirc`	Intersections of circles in Cartesian plane
`maptriml`	Trim lines to latitude-longitude quadrangle
`maptrimp`	Trim polygons to latitude-longitude quadrangle
`reducem`	Reduce density of points in vector data
`removeExtraNanSeparators`	Clean up NaN separators in polygons and lines
`nanclip`	Clip vector data with NaNs at specified pen-down locations

`bufferm`	Buffer zones for latitude-longitude polygons
`flatearthpoly`	Insert points along date line to pole
`ispolycw`	True if polygon vertices are in clockwise order
`poly2ccw`	Convert polygon contour to counterclockwise vertex ordering
`poly2cw`	Convert polygon contour to clockwise vertex ordering
`poly2fv`	Convert polygonal region to patch faces and vertices
`polybool`	Set operations on polygonal regions
`polyshape`	2-D polygons
`polyxpoly`	Intersection points for lines or polygon edges
`polyjoin`	Convert line or polygon parts from cell arrays to vector form
`polymerge`	Merge line segments with matching endpoints
`polysplit`	Convert line or polygon parts from vector form to cell arrays
`updategeostruct`	Convert line or patch display structure to geostruct

`cart2grn`	Transform projected coordinates to Greenwich system
`grn2eqa`	Convert from Greenwich to equal area coordinates
`eqa2grn`	Convert from equal area to Greenwich coordinates

Objects

`geopoint`	Geographic point vector
`geoshape`	Geographic shape vector
`mappoint`	Planar point vector
`mapshape`	Planar shape vector

Topics

Vector Geodata

Vector geodata consists of sequentially ordered pairs of geographic (latitude, longitude) or projected (x,y) coordinate pairs.

Inspect and Display Vector Map Data

This example shows how to display vector data on a map, and how to print to screen the coordinates of points in the vector data.

Geographic Data Structures

A geographic data structure stores geographic features as elements in a structure array. The structure has fields such as the geometry of the vector feature, and the coordinates of points in the vector.

Points, Lines, and Polygons

Vector data can specify the type of relationship between coordinates as isolated points, line segments, or enclosed areas.

Segments Versus Polygons
Extract and Join Polygons or Line Segments
Link Line Segments with Common Endpoints into Polygons
Polygon Buffer Zones
Polygon Set Logic
Overlay Polygons Using Set Logic

Simplify Vector Coordinate Data

Eliminate visually redundant coordinates to remove unnecessary detail, and to speed and stylize map displays.

Geographic Interpolation of Vectors

Geographic data interpolation infers the value of geographic data at locations between sampled data points.

Mapping Toolbox Documentation

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