How to write a matrix into Geotiff file?

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Leon
Leon on 27 May 2015
Commented: Waqas Ahmad on 22 Aug 2017
The instruction provided by Mathworks says this "geotiffwrite(filename,A,R) writes a georeferenced image or data grid, A, spatially referenced by R, into an output file, filename."
My question is what exactly is R?
I have a matrix Z the size of 181 x 361, and I want to save it as a Geotiff file so that my friend can read it into ArcGIS. I tried
geotiffwrite('a.tif', Z, size(Z))
and it did not work;
  1 Comment
Waqas Ahmad
Waqas Ahmad on 22 Aug 2017
R is a georeferencing matrix which specifies the position of your grtid (matrix Z) on the world map when you open the geotif in arcgis. See refmatToGeoRasterReference documentation https://kr.mathworks.com/help/map/ref/refmattogeorasterreference.html

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Answers (1)

Dasharath Gulvady
Dasharath Gulvady on 28 May 2015
According to the documentation R is:
spatialref.GeoRasterReference object, referencing matrix, or referencing vector; or spatialref.MapRasterReference object or referencing matrix. Provides spatial referencing information.
You may use "georasterref" to create a reference matrix from your matrix.

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