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Dear all,

I have developed a finite element grid in Blue Kenue, I have some doubts in the coordinate system associated with this grid.

1. In which coordinate system does Blue Kenue create the grid (Cartesian or Spherical or both)?

2. How can I create a finite element grid in spherical coordinate? Is it possible to convert the existing finite element grid from Cartesian to Spherical? What should I do for that?

Due to some reasons I need to create the Grid in Spherical coordinates.

Can someone please help me with suggestions to overcome this problem? Any help would be greatly appreciated.

Sincerely,

Chidambaram.

Blue Kenue simply assumes an isotropic coordinate system.

The coordinate system of your mesh will be in the same coordinate system as your source data (the outline, hard/soft lines, points, etc.).

If your source data coordinates are in meters then lengths are also in meters.
If your source data is in degrees (lat/log) then your density will have to be in degrees as well. (can be done but it's a bit awkward)

I usually find it's best to project all source data to something like UTM or Polar Stereo, generate the mesh and project the resulting mesh to LatLong. The choice of intermediate coordinate system depends on the size of your domain.

Hope this helps... Martin

Dear martin, thanks for your quick reply.

I took the coastline from the base-map inside the Software. Can you tell me what coordinate system is used in the base-map?

Sincerely

Chidambaram