Signed boundary latitude/longitude values

[muteebali]

@jnyrup @0x1mason Is there any way to find out the signed(+/-) boundary values of latitude/longitude. As before, i am trying to extract values from key value pair i.e. startingLatitude, startingLongitude, lastLatitude, lastLongitude but in each case i get positive(+) values. For South and West, values should be negative. Can you suggest any way, I need to draw boundary using these values.

[jnyrup]

What are the minimum and maximum values of {starting, last}{latitude, longitude}? I have seen data providers represent longitude in either [-180;180) or [0;360). The few datasets I have been working with have always represented latitude in [-90;90], but maybe yours is in [0;180]?

I just had a look at https://software.ecmwf.int/wiki/display/ECC/ecCodes+version+2.5.0+released and there seems to be several fixes for lat/long.

[muteebali]

@jnyrup

1. We are getting these values in meta data of records.
2. Longitude values are not being incremented correctly, go outside of the range.
3. I am using GribApi.NET 1.0.0-beta4, is this version using ecCodes 2.5.0? if not then how can we add support for ecCodes 2.5.0 in GribApi.NET 1.0.0-beta4 source code?

[jnyrup]

GribApi.NET 1.0.0-beta4 uses ecCodes 2.4.1. I haven't successfully built GribApi.NET from scratch myself, but here are some observations:

• GribApi.NET depends on GribApi.Native.
• GribApi.Native has GribApi.XP as a git submodule
• GribApi.XP has some notes on how to update ecCodes

[0x1mason]

In GRIB 2, longitude is 0-360. In GRIB 1 It's -180 to 180. It's part of the spec. You can determine how to offset by checking the edition.

On Dec 18, 2017 4:42 AM, "muteebali" notifications@github.com wrote:

@jnyrup https://github.com/jnyrup @0x1mason https://github.com/0x1mason Is there any way to find out the signed(+/-) boundary values of latitude/longitude. As before, i am trying to extract values from key value pair i.e. startingLatitude, startingLongitude, lastLatitude, lastLongitude but in each case i get positive(+) values. For South and West, values should be negative. Can you suggest any way, I need to draw boundary using these values.

— You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub https://github.com/0x1mason/GribApi.NET/issues/95, or mute the thread https://github.com/notifications/unsubscribe-auth/AEX_-7_TDAz1anJkTXV1qXPSbOreaBVDks5tBjNngaJpZM4RFM1g .

[muteebali]

@0x1mason I am using this file 20171215054150.zip In this case, i am getting out of range (Inappropriate) latitude values. Here is the code,

using(var grib=new GribFile(filePath)) { foreach(var record in grib) { //Here my logic to store extracted data } }

[0x1mason]

Can you provide a link to the originating center's grid definition?

[0x1mason]

This issue was moved to GribApiDotNet/GribApi.NET#1

[muteebali]

@0x1mason i am downloading GRIB files using third party tool ZYGRIB. Has this issue been resolved ?

[muteebali]

@jnyrup @0x1mason have you found any issue with above mentioned file ?