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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.
> Full Name: daikan > Email Address: address@hidden > Organization: china national meteorology center > Package Version: 4.1 build date:2013-08-02 18:38 UTC > Operating System: Windows 7 > Hardware: Java: home: C:\Program Files\IDV_4.1\jre version: 1.6.0_43 > j3d:1.5.2 fcs (build4) > Description of problem: > > Hi, > > I want to know the "ddx" function, for regular lon/lat grid, > will It convert the grid interval dlon or dlat to real distance > dx or dy in meters. > > Very thansk! > > daikan > Yes, ddx works for the lat/lon grid. It does convert dlon to the real distance. Yuan > Ticket Details =================== Ticket ID: DUO-541609 Department: Support IDV Priority: Normal Status: Closed