interpm

Densify latitude-longitude sampling in lines or polygons

Syntax

[latout,lonout] = interpm(lat,lon,maxdiff)
[latout,lonout] = interpm(lat,lon,maxdiff,method)
[latout,lonout] = interpm(lat,lon,maxdiff,method,units)

Description

[latout,lonout] = interpm(lat,lon,maxdiff) fills in any gaps in latitude (lat) or longitude (lon) data vectors that are greater than a defined tolerance maxdiff apart in either dimension. The angle units of the three inputs need not be specified, but they must be identical. latout and lonout are the new latitude and longitude data vectors, in which any gaps larger than maxdiff in the original vectors have been filled with additional points. The default method of interpolation used by interpm is linear.

[latout,lonout] = interpm(lat,lon,maxdiff,method) interpolates between vector data coordinate points using a specified interpolation method. Valid interpolation method strings are 'gc' for great circle, 'rh' for rhumb line, and 'lin' for linear interpolation.

[latout,lonout] = interpm(lat,lon,maxdiff,method,units) specifies the units used, where units is any valid angle units string. The default is 'degrees'.

Examples

lat = [1 2 4 5]; lon = [7 8 9 11];
[latout,lonout] = interpm(lat,lon,1);
[latout lonout]

ans =
    1.0000    7.0000
    2.0000    8.0000
    3.0000    8.5000
    4.0000    9.0000
    4.5000   10.0000
    5.0000   11.0000

See Also

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