This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
>From: Kevin Thomas <address@hidden> >Organization: University of Oklahoma/CAPS >Keywords: 200110222135.f9MLZn102781 McIDAS-X ADDE GINI AREA Kevin, >I have a new problem with the GINI data. CAPS software is looking for GVAR >format data. Our software is identifying the data in TANC format. It does >seem to find a few header records, but gets lost quickly. If I modify the >software to say that GVAR and TANC are the same (which they obviously aren't, >our software core dumps. The satellite imagery in NOAAPORT, the GINI data, are in one of three projections: Mercator (MERC), Lambert Conformal Tangent Cone (TANC), or Polar Stereographic (PS). None of the data are in GVAR projections. >Is there a way of converting to GVAR format? You could use McIDAS to remap the data from GINI projection into an existing image in GVAR format. I have to warn you that this would be the second remap of the data: it is remapped into the desired projection in the GINI conversion process; you would be remapping it back into a GVAR projection. >If not, can you tell me where I can get documentation on TANC format? Even though the answer is yes, I can still point you to the TANC format: Unidata McIDAS-X 7.8 HomePage http://www.unidata.ucar.edu/packages/mcidas/780/index.html Documentation and Training http://www.unidata.ucar.edu/packages/mcidas/780/doc_info.html McIDAS Programmer's Reference Manual http://www.ssec.wisc.edu/mug/prog_man/prog_man.html Click on Version 7.60 in the last page and then read through the McIDAS Navigation section of Chapter 6 - Accessing Data. The TANC projection is used as the example in those manual pages. Tom >From address@hidden Wed Oct 24 13:56:28 2001 >Subject: Re: 20011024: converting GINI format images to McIDAS AREA re: remap to GVAR means that you will have remapped twice Definitely not good, as the software that wants GVAR format then maps it into our own ARPS format. It sounds like I need to write code to read the NOAAPORT GINI data itself, and remap directly into ARPS format. I know of a local satellite guru that I will pester, so I'll ask him for documentation on where to go from here. Thanks again. Kevin W. Thomas Center for Analysis and Prediction of Storms University of Oklahoma Norman, Oklahoma Email: address@hidden