Dear Dr. Sreenath,

What is the coordinate system used by your rasters? And what is the cell size?

In order to use the larval dispersal tool, it is necessary that your rasters be in a projected coordinate system. Such a system will use a linear unit of measure, typically meters. It is necessary to use a projected system so that physical calculations are easy to perform.

When you say you used patches with cell sizes of 0.08 and 0.046, it sounds like those units are in degrees, which is an angular unit. This suggests that the rasters are not in a projected coordinate system. The Create Larval Connectivity Simulation tool is supposed to fail if you provide rasters in an unprojected coordinate system. Did that happen?

Alternatively, it may be that you created rasters in a projected system with cell sizes of 0.08 or 0.046. This seems very unlikely, because those sizes would be in meters, resulting in a raster with a huge number of rows and columns. But if that is indeed what happened, it is not surprising that the Resampling tool used inside MGET would fail.

If you would like, you may send me the Simulation Directory created by the Create Larval Connectivity Simulation tool. I will check it to see if the coordinate system and the cell size seems reasonable for use with the HYCOM GLBa0.08 data.

Best regards,

Jason

From: <> On Behalf Of Sreenath Ramanathan
Sent: Tuesday, July 31, 2018 3:10 PM
To:
Subject: [mget-help] Resampling error-MGET