[Paraview] GMT grids to 3D surface

[Lester Anderson]

Hello,

I rechecked the GMT grids and the Warp by Scalar only seems to work on some
data (if the reference frame is cartesian), but not with longitude-latitude
grids. I checked both the classic GMT netCDF format (cf) and the new format
(nf) and although there is no problem loading the data, the warp by scalar
is greyed out.

I generated a topo grid from Sandwell & Smith (area = 10/10/-10/10) at 1
arc minute cell size and it loads as a structured (curvilinear) grid. The Z
values are correct for the bathymetry and topography. In this case, the
surface is curved as expected for a section on the sphere, so maybe that is
why the warp by scalar is not available?

The file I got to work before was a simple flat surface in cartesian units.
This grid was defined as an image (uniform rectilinear grid) before the
warp was applied.

Still not sure about this one.

Lester

On 25 February 2015 at 19:35, Lester Anderson <arctica1963 at gmail.com> wrote:

> Thanks Utkarsh, that solved the issue fine :)
>
> Cheers
> Lester
>
> On 25 February 2015 at 14:17, Utkarsh Ayachit <utkarsh.ayachit at kitware.com
> > wrote:
>
>> Have you tried the "Warp By Scalar" filter? The filter allows you to
>> select the scalar to warp with as well as the normal along which to
>> warp the mesh.
>>
>> Utkarsh
>>
>> On Tue, Feb 24, 2015 at 5:37 AM, Lester Anderson <arctica1963 at gmail.com>
>> wrote:
>> > Hello,
>> >
>> > I can see how to load a GMT (netCDF) grid into Paraview but cannot seem
>> to
>> > see how to translate it into an elevation surface.
>> >
>> > The data is a gridded surface of a subducting slab geometry, with X, Y
>> as
>> > longitude and latitude respectively, and Z as the depth range 0 to -700
>> km.
>> > Here the Z value represents the scalar depth.
>> >
>> > Do I need to pre-process the data prior to loading into Paraview? When
>> > loaded the Z-dimension is 1 so it is still essentially a 2D surface.
>> Loading
>> > point data (eg earthquake solutions) is fine as I can edit the data
>> table,
>> > but not sure what else I need to get a slab surface in correctly: for
>> > plotting the Z-dimension would need to have an extent of 0 to 699
>> (d=700).
>> >
>> > Be good to know how I can solve this simply.
>> >
>> > Cheers
>> >
>> > Lester
>> >
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