Feature #305

Oblique maps UTM/cartesian coordinates (-Jx)

Added by Maarten about 7 years ago.

Status:NewStart date:2013-06-06
Priority:NormalDue date:
Assignee:-% Done:


Target version:-


I would like to have oblique maps in cartesian (UTM) coordinates, without havign to reproject data (typically large data sets, and reprojecting may be confusion).
As the data are in UTM coordinates, I use -Jx (cartesian) with a given
scale. Rotating this over a certain angle does not change the scale.
Then, the area for the map would not be just -Rx1/x2/y1/y2, but rather
something like -Rx1/y1/x2/y2/x3/y3 (which is a major change to the
general syntax of GMT) with (x,y)i i=1:3 three out of four border
coordinates for the rotated box; or -Rxll/yll/xur/yur/alpha with {ll =
"lower left"; ur = "upper right", realizing that upper right y may fall
below lower left y in fact} the box coordinates of the rotated figure,
and alpha a rotation angle to be applied. An example is attached.

cartesiancoordinatesystemrotation.png (527 KB) Maarten, 2013-06-06 01:39

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