[issm-support] Issues with meshing..

[Derrick Lampkin]

Greetings,

I recently attended the ISSM workshop and found it useful. I'm attempting to use the system to model a system in the Jakobshavn outlet basin. I have been using your Jakobshavn example as a template. The exception is I'm using a base of surface velocity data derived from NSIDC (Joughin data set). I have imported a surface velocity grid as GEOTIFF into matlab and I use the exptool to draw the outline of my domain on top of this base map. The map is in the polar stereo graphic projection but when I create the initial mesh using triangle at the nominal resolution of the data (500 m), the grid spacing was not nearly as dense as expected. I inspected the domain file I created and the vertices coordinates are in scene coordinates (row/column) values and not the projected coordinates , therefore the mesh spacing are not reasonable and do not correspond to the specified resolution I indicate in the triangle command. How might I fix this issue?

Thanks

derrick j lampkin
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research professor

                institute of arctic and alpine research                            
                university of colorado-boulder

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email: djl22 at psu.edu