<br>I have to admit an ignorance to some of the inner workings of Grads development. But I am quite surprised to hear that lats4d is not presently supported in Grads 2.<br><br>I have been using Grads for 10 years now (I can still recall the relief after years of ncargf77 programming :-) Of course, I still write code when appropriate, but grads and lats4d have been the main tools in my work. Lats4d fills a critical void. By pointing it at any grads formatted file (netcdf, hdf, binary or grib), I can reformat the data to what ever a colleague may need. I can also, easily, no, effortlessly subset variables space or time. Coupled with a call to regrid, this subsetting utility is beyond compare. In a c shell, it can rip through huge data files with simplicity. I hope this does not sound like exaggeration, lats4d is the strongest data tool I have used.<br>
<br>In our office, we have just begun production of a new reanalysis data product. While it will take some time to complete, we are beginning to develop examples on how users can access and analyze the data. Comparison with other reanalyses is obvious and will be in high demand. To accomplish that, they will need to regrid our data sets to the existing coarser reanalysis data sets. Or, they may need to change the format out of our native HDF. The easiest way to explain to others how to do this is with lats4d.<br>
<br>There will be 100Tb of reanalysis data available through a GDS. With Lats4d and gradsdods (or gradsdap), this would be much more accessible. Users, with some examples, will access the data through online capabilities, rather than bulk downloading of the native HDF files (a throttle may be needed for access if that is the preferred by users). In addition, a plan is being prepared to develop a DVD, similar to the NCEP reanalyses CD and NARR DVD. Personally, I would like to see a flavor of grads and lats4d included therein (admittedly, I have not gotten to discuss this with the grads developers yet).<br>
<br>It doesn't stop there. At AMS last week, NCEP and NCDC held a town hall meeting to discuss their plans for the next reanalyses. They expect to have nearly 1000Tb of data from three different reanalyses, and their production has also started. I don't see storage as a barrier, but bandwidth is. Too many users making too many big requests will limit accessibility. Lats4d access to their GDS will become an important function.<br>
<br>Again, I have to admit I do not know the extent of the issues here. By necessity, I will have to use versions of grads that include lats4d not only in my work, but as I show other how to use our data. I felt the need to speak up and I hope that these issues will be considered.<br>
<br>A sincere grads and lats4d user,<br><br>Mike Bosilovich<br><br>