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pix2map

Convert pixel coordinates to map coordinates

Syntax

[x,y] = pix2map(R,row,col)
s = pix2map(R,row,col)
[...] = pix2map(R,p)

Description

[x,y] = pix2map(R,row,col) calculates map coordinates x,y from pixel coordinates row,col. R is either a 3-by-2 referencing matrix defining a two-dimensional affine transformation from intrinsic pixel coordinates to map coordinates, or a map raster reference object. row and col are vectors or arrays of matching size. The outputs x and y have the same size as row and col.

s = pix2map(R,row,col) combines x and y into a single array s. If row and col are column vectors of length n, then s is an n-by-2 matrix and each row (s(k,:)) specifies the map coordinates of a single point. Otherwise, s has size [size(row) 2], and s(k1,k2,...,kn,:) contains the map coordinates of a single point.

[...] = pix2map(R,p) combines row and col into a single array p. If row and col are column vectors of length n, then p should be an n-by-2 matrix such that each row (p(k,:)) specifies the pixel coordinates of a single point. Otherwise, p should have size [size(row) 2], and p(k1,k2,...,kn,:) should contain the pixel coordinates of a single point.

Examples

% Find the map coordinates for the pixel at (100,50).
R = worldfileread('concord_ortho_w.tfw');
[x,y] = pix2map(R,100,50);

See Also

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