Vector Data

Analyze and transform point, line, and polygon data

Vector data uses points, lines, polygons, and their non-spatial attributes to describe real-world objects, locations, and events. For example, you can represent a city by using a point, a river by using a line, and a country by using a polygon. The vertices of points, lines, and polygons can be in geographic (latitude-longitude) or projected (x-y) coordinates.

Functions

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Convert Representations

Geospatial Tables, Tables, and Structures

`geotable2table`	Convert geospatial table to table
`table2geotable`	Convert table to geospatial table
`struct2geotable`	Convert structure array to geospatial table

Line and Polygon Coordinate Arrays

`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
`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
`closePolygonParts`	Close all rings in multipart polygon
`removeExtraNanSeparators`	Clean up `NaN` separators in polygons and lines

Examine Vector Data

`ispolycw`	True if polygon vertices are in clockwise order
`isgeotable`	Determine if input is geospatial table
`isShapeMultipart`	True if polygon or line has multiple parts
`extractfield`	Field values from structure array

Modify Vector Data

Interpolate Coordinates

`interpm`	Densify latitude-longitude sampling in lines or polygons
`intrplat`	Interpolate latitude at given longitude
`intrplon`	Interpolate longitude at given latitude

Clip Lines and Polygons

`maptriml`	Trim lines to latitude-longitude quadrangle
`maptrimp`	Trim polygons to latitude-longitude quadrangle
`nanclip`	Clip vector data with NaNs at specified pen-down locations
`flatearthpoly`	Clip polygon to world limits

Buffer or Reduce Density

`bufferm`	Buffer zones for latitude-longitude polygons
`reducem`	Reduce density of points in vector data

Find Intersections

`polyxpoly`	Intersection points for lines or polygon edges
`linecirc`	Intersections of circles and lines in Cartesian plane
`circcirc`	Intersections of circles in Cartesian plane

Objects

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Point, Line, and Polygon Shapes

`geopointshape`	Point shape in geographic coordinates
`geolineshape`	Line shape in geographic coordinates
`geopolyshape`	Polygon in geographic coordinates
`mappointshape`	Point shape in planar coordinates
`maplineshape`	Line shape in planar coordinates
`mappolyshape`	Polygon in planar coordinates

Coordinate and Attribute Containers

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

Topics

Vector Data Representations

Create Geospatial Tables

Geospatial tables contain shapes and attributes for point, line, and polygon data. Import geospatial tables from vector data files, convert tables to geospatial tables, or create geospatial tables from arrays.

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.