Syntax

Description

[lat,lon] = findm(Z,R)computes the latitudes and longitudes of the nonzero elements of a regular data grid,Z.Rcan be a geographic raster reference object, a referencing vector, or a referencing matrix.

IfRis a geographic raster reference object, itsRasterSizeproperty must be consistent withsize(Z).

IfRis a referencing vector, it must be a 1-by-3 with elements:

[cells/degree northern_latitude_limit western_longitude_limit]

IfRis a referencing matrix, it must be 3-by-2 and transform raster row and column indices to or from geographic coordinates according to:

[lon lat] = [row col 1] * R

IfR是一个引用矩阵,它必须定义一个(non-rot吗ational, non-skewed) relationship in which each column of the data grid falls along a meridian and each row falls along a parallel. Nearest-neighbor interpolation is used by default. NaN is returned for points outside the grid limits or for whichlatorloncontain NaN. All angles are in units of degrees.

[lat,lon] = findm(latz,lonz,Z)returns the latitudes and longitudes of the nonzero elements of a geolocated data gridZ, which is an M-by-N logical or numeric array. Typicallylatzandlonzare M-by-N latitude-longitude arrays, butlatzmay be a latitude vector of length M andlonzmay be a longitude vector of length N.

[lat,lon,val] = findm(...)returns the values of the nonzero elements ofZ, in addition to their locations.

mat = findm(...)returns a single output, wheremat = [lat lon].

This function works in two modes: with a regular data grid and with a geolocated data grid.

Version History

See Also

find|geographicToDiscrete