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Re: create an UTM grid [message #78411 is a reply to message #78410]

Mon, 28 November 2011 12:02

natha
Messages: 482
Registered: October 2007

Senior Member

I think the following code is better :

x_grid=REBIN(x_grid,xdim,ydim,/SAMPLE)
y_grid=TRANSPOSE(REBIN(y_grid,ydim,xdim,/SAMPLE))

result=MAP_PROJ_INVERSE(x_grid, y_grid, MAP_STRUCTURE=map_utm)

res_lon=REFORM(result[0,*],xdim,ydim)
res_lat=REFORM(result[1,*],xdim,ydim)

By the way, I am missing something here...

UTM is a cartesian coordinate system. Theoretically, the distance
between two points on the grid could be performed using the
Pythagorean theorem (because all distances should be equal). What I
realize is that the distances are different and never equal to 1km. I
checked that using the routine MAP_2POINTS. Do you know why ?

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[Message index]

		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 14:35
		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 14:33
		Re: create an UTM grid By: natha on Mon, 28 November 2011 12:02
		Re: create an UTM grid By: natha on Mon, 28 November 2011 11:25
		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 10:12
		Re: create an UTM grid By: David Fanning on Mon, 28 November 2011 14:38

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