Invalid Greenwich crossing flag [Matlab]

From: Brian on 5 May 2010 22:13

I'm playing with loading some medium and high res map files and getting an "Invalid Greenwich crossing flag" error with this code:

filename = unzip([directory 'gshhs_c.zip'], tempdir);
world = gshhs(filename{1});

Error details:

??? Error using ==> gshhs>attribError at 324
Invalid attribute header in file "C:\DOCUME~1\BSCHIE~1\LOCALS~1\Temp\gshhs_c.b".
Invalid Greenwich crossing flag: 28.

Error in ==> gshhs>validateHeader at 724
attribError(FileID, 'invalidGreenwichCrossFlag', errorMsg)

Error in ==> gshhs>readAttributes at 315
validateHeader(header, FileID)

Error in ==> gshhs>gshhsRead at 390
A = readAttributes(FileID);

Error in ==> gshhs at 140
S = gshhsRead(FileID,latlim,lonlim,subset);

Error in ==> areaMapExample at 23
world = gshhs(filename{1});

------------------------------------

I downloaded the GSHHS file from http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/version2.0/
and unzipped it on a WindowsXP box using WinZip.

Is there a file incompatibility on Windoz boxes that causes the unzip to fail?
THANKS for any tips!
-Brian

From: Brian on 6 May 2010 12:47

Perhaps someone has an example of a working mapping call which uses gshhs?

"Brian " <bschieber(a)SPAMBITES.spg.ucsd.edu> wrote in message <hrt8jh$7b$1(a)fred.mathworks.com>...
> I'm playing with loading some medium and high res map files and getting an "Invalid Greenwich crossing flag" error with this code:
>
> filename = unzip([directory 'gshhs_c.zip'], tempdir);
> world = gshhs(filename{1});
>
> Error details:
>
> ??? Error using ==> gshhs>attribError at 324
> Invalid attribute header in file "C:\DOCUME~1\BSCHIE~1\LOCALS~1\Temp\gshhs_c.b".
> Invalid Greenwich crossing flag: 28.
>
> Error in ==> gshhs>validateHeader at 724
> attribError(FileID, 'invalidGreenwichCrossFlag', errorMsg)
>
> Error in ==> gshhs>readAttributes at 315
> validateHeader(header, FileID)
>
> Error in ==> gshhs>gshhsRead at 390
> A = readAttributes(FileID);
>
> Error in ==> gshhs at 140
> S = gshhsRead(FileID,latlim,lonlim,subset);
>
> Error in ==> areaMapExample at 23
> world = gshhs(filename{1});
>
> ------------------------------------
>
> I downloaded the GSHHS file from http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/version2.0/
> and unzipped it on a WindowsXP box using WinZip.
>
> Is there a file incompatibility on Windoz boxes that causes the unzip to fail?
> THANKS for any tips!
> -Brian

From: Brian on 6 May 2010 15:19

Aha! Seems I missed this little detail in the GSHHS help:
gshhs

Read Global Self-Consistent Hierarchical High-Resolution Shoreline
Syntax

S = gshhs(filename)
S = gshhs(filename, latlim, lonlim)
indexfilename = gshhs(filename, 'createindex')
Description

S = gshhs(filename) reads GSHHS version 1.3 and earlier vector data for the entire world from filename.

It appears GSHHS is not up to date with handling the 2.0 version of the data. I test 1.3 which works as described.
-Brian

"Brian " <bschieber(a)SPAMBITES.spg.ucsd.edu> wrote in message <hrt8jh$7b$1(a)fred.mathworks.com>...
> I'm playing with loading some medium and high res map files and getting an "Invalid Greenwich crossing flag" error with this code:
>
> filename = unzip([directory 'gshhs_c.zip'], tempdir);
> world = gshhs(filename{1});
>
> Error details:
>
> ??? Error using ==> gshhs>attribError at 324
> Invalid attribute header in file "C:\DOCUME~1\BSCHIE~1\LOCALS~1\Temp\gshhs_c.b".
> Invalid Greenwich crossing flag: 28.
>
> Error in ==> gshhs>validateHeader at 724
> attribError(FileID, 'invalidGreenwichCrossFlag', errorMsg)
>
> Error in ==> gshhs>readAttributes at 315
> validateHeader(header, FileID)
>
> Error in ==> gshhs>gshhsRead at 390
> A = readAttributes(FileID);
>
> Error in ==> gshhs at 140
> S = gshhsRead(FileID,latlim,lonlim,subset);
>
> Error in ==> areaMapExample at 23
> world = gshhs(filename{1});
>
> ------------------------------------
>
> I downloaded the GSHHS file from http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/version2.0/
> and unzipped it on a WindowsXP box using WinZip.
>
> Is there a file incompatibility on Windoz boxes that causes the unzip to fail?
> THANKS for any tips!
> -Brian

From: Kelly Luetkemeyer on 7 May 2010 10:13

Hi Brian,

Yes the GSHHS function does not yet support version 2.0 of the dataset.
You can also try reading the shapefiles that are located at

http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/version2.0/shapefiles/

Use the function SHAPEREAD.

Thanks for your post -- we'll look into upgrading the function in a
later release.

-Kelly

Brian wrote:
> Aha! Seems I missed this little detail in the GSHHS help:
> gshhs
>
> Read Global Self-Consistent Hierarchical High-Resolution Shoreline
> Syntax
>
> S = gshhs(filename)
> S = gshhs(filename, latlim, lonlim)
> indexfilename = gshhs(filename, 'createindex')
> Description
>
> S = gshhs(filename) reads GSHHS version 1.3 and earlier vector data for
> the entire world from filename.
>
> It appears GSHHS is not up to date with handling the 2.0 version of the
> data. I test 1.3 which works as described. -Brian
>
>
> "Brian " <bschieber(a)SPAMBITES.spg.ucsd.edu> wrote in message
> <hrt8jh$7b$1(a)fred.mathworks.com>...
>> I'm playing with loading some medium and high res map files and
>> getting an "Invalid Greenwich crossing flag" error with this code:
>>
>> filename = unzip([directory 'gshhs_c.zip'], tempdir);
>> world = gshhs(filename{1});
>>
>> Error details:
>>
>> ??? Error using ==> gshhs>attribError at 324
>> Invalid attribute header in file
>> "C:\DOCUME~1\BSCHIE~1\LOCALS~1\Temp\gshhs_c.b".
>> Invalid Greenwich crossing flag: 28.
>>
>> Error in ==> gshhs>validateHeader at 724
>> attribError(FileID, 'invalidGreenwichCrossFlag', errorMsg)
>>
>> Error in ==> gshhs>readAttributes at 315
>> validateHeader(header, FileID)
>>
>> Error in ==> gshhs>gshhsRead at 390
>> A = readAttributes(FileID);
>>
>> Error in ==> gshhs at 140
>> S = gshhsRead(FileID,latlim,lonlim,subset);
>>
>> Error in ==> areaMapExample at 23
>> world = gshhs(filename{1});
>>
>> ------------------------------------
>>
>> I downloaded the GSHHS file from
>> http://www.ngdc.noaa.gov/mgg/shorelines/data/gshhs/version2.0/
>> and unzipped it on a WindowsXP box using WinZip.
>> Is there a file incompatibility on Windoz boxes that causes the unzip
>> to fail? THANKS for any tips!
>> -Brian

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