Problem with DEM extending on a rectangular area: "big box" appears

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Hi all,

I've downloaded a .tif file containing raster data of Gale crater on Mars.

Since it is a high resolution file (1 pixel per meter) covering an area of about 33000 m x 57500 m, I rescale it with the command gdalwarp proposed in Gazebo's DEM tutorial (the rescale factor equal to 1/100):

gdalwarp -ts 330 575 /Gale_original.tif /Gale_new.tif

Then I created the file Gale.world in which the .tif file Gale_new.tif is loaded in order to visualize the DEM on Gazebo.

In the Gale.world file I choose the size of the DEM as shown below:

<uri>file://media/dem/Gale_crater2.tif</uri>
              <size>330 575 100</size>

(the choice for the height = 100 is not realistic, but it does not matter for now)

When I run Gazebo I visualize a sort of big box that Gazebo uses in order to transform the area where the DEM is built from rectangular (330 m x 575 m) into square (575 m x 575 m). The height of this box is equal to 100 m.

How can I fix this this problem? Can I create in Gazebo a DEM that covers a rectangular area? Thanks in advance!!