Bob Simons wrote:
John Caron wrote:
great, thanks. Do you have a URL where this happens?
"http://oceanwatch.pfeg.noaa.gov:8081/dods/GLOBEC/GLOBEC_MOC1?abund_m3,lat,long";
Bob Simons wrote:
In case you haven't been able to find the problem with
variable.read(rowOrigin, rowShape) returning a full-sized Array that
I mentioned before, I can provide more information:
The problem occurs with
NetcdfDataset ncDataset = NetcdfDataset.openDataset(fullFileName);
where the fullFileName is an OPeNDAP sequence url.
The variables are found via
structure = (Structure)rootGroupVariables.get(v);
then
structure.getVariables()
The problem does not occur with a
NetcdfFile ncFile = new NetcdfFile(fullFileName);
where fullFileName is a .nc file on my hard drive.
and where the variables are found via
List variableList = ncFile.getVariables();
The variables are ArrayXxx.1D Arrays.
If I'm doing something wrong, please let me know. I'm still stumbling
around trying to figure out how to do things.
I wrote a work-around in my code for the bug, so a fix isn't urgent.
Hi Bob, thanks for the info. The problem is that this is a sequence, which in
the DAP-2 spec, doesnt allow index subsetting. (Probably I should throw an
Exception if you try?)
The DDS is:
Dataset {
Sequence {
String date;
String year;
String program;
String cruise_id;
Int16 cast_no;
String stn_id;
Float64 lat;
Float64 long;
Int16 water_depth;
Byte sample_id;
Float64 min_sample_depth;
Float64 max_sample_depth;
Byte month_local;
Int16 day_local;
Int16 time_local;
String d_n_flag;
String gear_type;
Byte gear_area_m2;
Float64 gear_mesh;
Float64 vol_filt;
String counter_id;
String comments;
String perc_counted;
String local_code;
String nodc_code;
String genus_species;
String life_stage;
Float64 abund_m3;
} MOC1;
} MOC1;
This gives a netcdf file as:
netcdf dods://oceanwatch.pfeg.noaa.gov:8081/dods/GLOBEC/GLOBEC_MOC1 {
variables:
Structure {
String date;
:long_name = "Date";
String year;
:long_name = "Year";
String program;
:long_name = "Program";
String cruise_id;
:long_name = "Cruise ID";
short cast_no;
:long_name = "Cast No";
String stn_id;
:long_name = "Station ID";
double lat;
:long_name = "Latitude";
double long;
:long_name = "Longitude";
short water_depth;
:long_name = "Water Depth";
byte sample_id;
:_unsigned = "true";
:long_name = "Sample ID";
double min_sample_depth;
:long_name = "Minimum Sample Depth";
double max_sample_depth;
:long_name = "Maximum Sample Depth";
byte month_local;
:_unsigned = "true";
:long_name = "Month Local";
short day_local;
:long_name = "Day Local";
short time_local;
:long_name = "Time Local";
String d_n_flag;
:long_name = "d_n_flag";
String gear_type;
:long_name = "Gear Type";
byte gear_area_m2;
:_unsigned = "true";
:long_name = "Gear Area m2";
double gear_mesh;
:long_name = "Gear Mesh";
double vol_filt;
:long_name = "Volume Filtered";
String counter_id;
:long_name = "Counter Id";
String comments;
:long_name = "Comments";
String perc_counted;
:long_name = "Percentage Counted";
String local_code;
:long_name = "Local Code";
String nodc_code;
:long_name = "NODC Code";
String genus_species;
:long_name = "Genus Species";
String life_stage;
:long_name = "Life Stage";
double abund_m3;
:long_name = "Abundance m3";
} MOC1(*);
}
The MOC1(*) means "variable length array". Thats how we are doing sequences
right now. If you go to
http://oceanwatch.pfeg.noaa.gov:8081/dods/GLOBEC/GLOBEC_MOC1.html
Youll notice that you can only get all the values, (or you can add a relational
constraint, which we are not currently supporting).
Anyway, we are still figuring out how to support sequences properly. Sorry for
the confusion.
John.
PS: I hope you dont mind im cc'ing to netcdf-java email group since this is
something others may be interested in.
