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Package ais :: Module waterlevel
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Module waterlevel

source code

Autogenerated python functions to serialize/deserialize binary messages.

Generated by: ./aisxmlbinmsg2py.py

Need to then wrap these functions with the outer AIS packet and then convert the whole binary blob to a NMEA string. Those functions are not currently provided in this file.

serialize: python to ais binary deserialize: ais binary to python

The generated code uses translators.py, binary.py, and aisstring.py which should be packaged with the resulting files.

Requires:

Author: xmlbinmsg

Version: 4791

Status: under development

License: Generated code has no license

To Do: FIX: put in a description of the message here with fields and types.

Date: 2007-03-31

Classes [hide private]
  Testwaterlevel
Use testvalue tag text from each type to build test case the waterlevel message
Functions [hide private]
BitVector
encode(params, validate=False)
Create a waterlevel binary message payload to pack into an AIS Msg waterlevel.		 source code
dict
decode(bv, validate=False)
Unpack a waterlevel message		 source code
 
decodeMessageID(bv, validate=False) source code
 
decodeRepeatIndicator(bv, validate=False) source code
 
decodeUserID(bv, validate=False) source code
 
decodeSpare(bv, validate=False) source code
 
decodedac(bv, validate=False) source code
 
decodefid(bv, validate=False) source code
 
decodeefid(bv, validate=False) source code
 
decodemonth(bv, validate=False) source code
 
decodeday(bv, validate=False) source code
 
decodehour(bv, validate=False) source code
 
decodemin(bv, validate=False) source code
 
decodesec(bv, validate=False) source code
 
decodestationid(bv, validate=False) source code
 
decodelongitude(bv, validate=False) source code
 
decodelatitude(bv, validate=False) source code
 
decodewaterlevel(bv, validate=False) source code
 
decodedatum(bv, validate=False) source code
 
decodesigma(bv, validate=False) source code
 
decodeo(bv, validate=False) source code
 
decodelevelinferred(bv, validate=False) source code
 
decodeflat_tolerance_exceeded(bv, validate=False) source code
 
decoderate_tolerance_exceeded(bv, validate=False) source code
 
decodetemp_tolerance_exceeded(bv, validate=False) source code
 
decodeexpected_height_exceeded(bv, validate=False) source code
 
decodelink_down(bv, validate=False) source code
 
decodetimeLastMeasured(bv, validate=False) source code
 
printHtml(params, out=sys.stdout) source code
 
printKml(params, out=sys.stdout)
KML (Keyhole Markup Language) for Google Earth, but without the header/footer		 source code
stdout
printFields(params, out=sys.stdout, format='std', fieldList=None, dbType='postgres')
Print a waterlevel message to stdout.		 source code
str
sqlCreateStr(outfile=sys.stdout, fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')
Return the SQL CREATE command for this message type		 source code
sqlhelp.create
sqlCreate(fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')
Return the sqlhelp object to create the table.		 source code
str
sqlInsertStr(params, outfile=sys.stdout, extraParams=None, dbType='postgres')
Return the SQL INSERT command for this message type		 source code
sqlhelp.insert
sqlInsert(params, extraParams=None, dbType='postgres')
Give the SQL INSERT statement		 source code
str
latexDefinitionTable(outfile=sys.stdout)
Return the LaTeX definition table for this message type		 source code
dict
testParams()
Return a params file base on the testvalue tags.		 source code
 
addMsgOptions(parser) source code
Variables [hide private]
  TrueBV = BitVector(bitstring= "1")
Why always rebuild the True bit? This should speed things up a bunch
  FalseBV = BitVector(bitstring= "0")
Why always rebuild the False bit? This should speed things up a bunch
  fieldList = ('MessageID', 'RepeatIndicator', 'UserID', 'Spare'...
  fieldListPostgres = ('MessageID', 'RepeatIndicator', 'UserID',...
  toPgFields = {'latitude': 'stationloc', 'longitude': 'stationl...
Go to the Postgis field names from the straight field name
  fromPgFields = {'stationloc': ('longitude', 'latitude')}
Go from the Postgis field names to the straight field name
  pgTypes = {'stationloc': 'POINT'}
Lookup table for each postgis field name to get its type.
  RepeatIndicatorEncodeLut = {'default': '0', 'do not repeat any...
  RepeatIndicatorDecodeLut = {'0': 'default', '3': 'do not repea...
  datumEncodeLut = {'IGLD-85': '1', 'LAT': '9', 'MHW': '4', 'MLL...
  datumDecodeLut = {'0': 'MLLW', '1': 'IGLD-85', '2': 'WaterDept...
Function Details [hide private]

encode(params, validate=False)

source code 

Create a waterlevel binary message payload to pack into an AIS Msg waterlevel.

Fields in params:
  • MessageID(uint): AIS message number. Must be 8 (field automatically set to "8")
  • RepeatIndicator(uint): Indicated how many times a message has been repeated
  • UserID(uint): Unique ship identification number (MMSI)
  • Spare(uint): Reserved for definition by a regional authority. (field automatically set to "0")
  • dac(uint): Designated Area Code (field automatically set to "366")
  • fid(uint): Functional Identifier (field automatically set to "1")
  • efid(uint): extended functional identifier (field automatically set to "1")
  • month(uint): Time the measurement represents month 1..12
  • day(uint): Time the measurement represents day of the month 1..31
  • hour(uint): Time the measurement represents UTC hours 0..23
  • min(uint): Time the measurement represents minutes
  • sec(uint): Time the measurement represents seconds
  • stationid(aisstr6): Character identifier of the station. Usually a number.
  • longitude(decimal): Location of the sensor taking the water level measurement or position of prediction. East West location
  • latitude(decimal): Location of the sensor taking the water level measurement or position of prediction. North South location
  • waterlevel(int): Water level in centimeters
  • datum(uint): What reference datum applies to the value
  • sigma(float): Standard deviation of 1 second samples used to compute the water level height
  • o(uint): Count of number of samples that fall outside a 3-sigma band about the mean
  • levelinferred(bool): indicates that the water level value has been inferred
  • flat_tolerance_exceeded(bool): flat tolerance limit was exceeded. Need better descr
  • rate_tolerance_exceeded(bool): rate of change tolerance limit was exceeded
  • temp_tolerance_exceeded(bool): temperature difference tolerance limit was exceeded
  • expected_height_exceeded(bool): either the maximum or minimum expected water level height limit was exceeded
  • link_down(bool): Unable to communicate with the tide system. All data invalid
  • timeLastMeasured(udecimal): Time relative since the timetag that the station actually measured a value.
Parameters:
  • params - Dictionary of field names/values. Throws a ValueError exception if required is missing
  • validate - Set to true to cause checking to occur. Runs slower. FIX: not implemented.
Returns: BitVector
encoded binary message (for binary messages, this needs to be wrapped in a msg 8

Note: The returned bits may not be 6 bit aligned. It is up to you to pad out the bits.

decode(bv, validate=False)

source code 

Unpack a waterlevel message

Fields in params:
  • MessageID(uint): AIS message number. Must be 8 (field automatically set to "8")
  • RepeatIndicator(uint): Indicated how many times a message has been repeated
  • UserID(uint): Unique ship identification number (MMSI)
  • Spare(uint): Reserved for definition by a regional authority. (field automatically set to "0")
  • dac(uint): Designated Area Code (field automatically set to "366")
  • fid(uint): Functional Identifier (field automatically set to "1")
  • efid(uint): extended functional identifier (field automatically set to "1")
  • month(uint): Time the measurement represents month 1..12
  • day(uint): Time the measurement represents day of the month 1..31
  • hour(uint): Time the measurement represents UTC hours 0..23
  • min(uint): Time the measurement represents minutes
  • sec(uint): Time the measurement represents seconds
  • stationid(aisstr6): Character identifier of the station. Usually a number.
  • longitude(decimal): Location of the sensor taking the water level measurement or position of prediction. East West location
  • latitude(decimal): Location of the sensor taking the water level measurement or position of prediction. North South location
  • waterlevel(int): Water level in centimeters
  • datum(uint): What reference datum applies to the value
  • sigma(float): Standard deviation of 1 second samples used to compute the water level height
  • o(uint): Count of number of samples that fall outside a 3-sigma band about the mean
  • levelinferred(bool): indicates that the water level value has been inferred
  • flat_tolerance_exceeded(bool): flat tolerance limit was exceeded. Need better descr
  • rate_tolerance_exceeded(bool): rate of change tolerance limit was exceeded
  • temp_tolerance_exceeded(bool): temperature difference tolerance limit was exceeded
  • expected_height_exceeded(bool): either the maximum or minimum expected water level height limit was exceeded
  • link_down(bool): Unable to communicate with the tide system. All data invalid
  • timeLastMeasured(udecimal): Time relative since the timetag that the station actually measured a value.
Parameters:
  • bv (BitVector) - Bits defining a message
  • validate - Set to true to cause checking to occur. Runs slower. FIX: not implemented.
Returns: dict
params

printFields(params, out=sys.stdout, format='std', fieldList=None, dbType='postgres')

source code 

Print a waterlevel message to stdout.

Fields in params:
  • MessageID(uint): AIS message number. Must be 8 (field automatically set to "8")
  • RepeatIndicator(uint): Indicated how many times a message has been repeated
  • UserID(uint): Unique ship identification number (MMSI)
  • Spare(uint): Reserved for definition by a regional authority. (field automatically set to "0")
  • dac(uint): Designated Area Code (field automatically set to "366")
  • fid(uint): Functional Identifier (field automatically set to "1")
  • efid(uint): extended functional identifier (field automatically set to "1")
  • month(uint): Time the measurement represents month 1..12
  • day(uint): Time the measurement represents day of the month 1..31
  • hour(uint): Time the measurement represents UTC hours 0..23
  • min(uint): Time the measurement represents minutes
  • sec(uint): Time the measurement represents seconds
  • stationid(aisstr6): Character identifier of the station. Usually a number.
  • longitude(decimal): Location of the sensor taking the water level measurement or position of prediction. East West location
  • latitude(decimal): Location of the sensor taking the water level measurement or position of prediction. North South location
  • waterlevel(int): Water level in centimeters
  • datum(uint): What reference datum applies to the value
  • sigma(float): Standard deviation of 1 second samples used to compute the water level height
  • o(uint): Count of number of samples that fall outside a 3-sigma band about the mean
  • levelinferred(bool): indicates that the water level value has been inferred
  • flat_tolerance_exceeded(bool): flat tolerance limit was exceeded. Need better descr
  • rate_tolerance_exceeded(bool): rate of change tolerance limit was exceeded
  • temp_tolerance_exceeded(bool): temperature difference tolerance limit was exceeded
  • expected_height_exceeded(bool): either the maximum or minimum expected water level height limit was exceeded
  • link_down(bool): Unable to communicate with the tide system. All data invalid
  • timeLastMeasured(udecimal): Time relative since the timetag that the station actually measured a value.
Parameters:
  • params - Dictionary of field names/values.
  • out - File like object to write to
Returns: stdout
text to out

sqlCreateStr(outfile=sys.stdout, fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')

source code 
Return the SQL CREATE command for this message type
Parameters:
  • outfile - file like object to print to.
  • fields - which fields to put in the create. Defaults to all.
  • extraFields - A sequence of tuples containing (name,sql type) for additional fields
  • addCoastGuardFields (bool) - Add the extra fields that come after the NMEA check some from the USCG N-AIS format
  • dbType - Which flavor of database we are using so that the create is tailored ('sqlite' or 'postgres')
Returns: str
sql create string

See Also: sqlCreate

sqlCreate(fields=None, extraFields=None, addCoastGuardFields=True, dbType='postgres')

source code 
Return the sqlhelp object to create the table.
Parameters:
  • fields - which fields to put in the create. Defaults to all.
  • extraFields - A sequence of tuples containing (name,sql type) for additional fields
  • addCoastGuardFields (bool) - Add the extra fields that come after the NMEA check some from the USCG N-AIS format
  • dbType - Which flavor of database we are using so that the create is tailored ('sqlite' or 'postgres')
Returns: sqlhelp.create
An object that can be used to generate a return

sqlInsertStr(params, outfile=sys.stdout, extraParams=None, dbType='postgres')

source code 
Return the SQL INSERT command for this message type
Parameters:
  • params - dictionary of values keyed by field name
  • outfile - file like object to print to.
  • extraParams - A sequence of tuples containing (name,sql type) for additional fields
Returns: str
sql create string

See Also: sqlCreate

sqlInsert(params, extraParams=None, dbType='postgres')

source code 
Give the SQL INSERT statement
Parameters:
  • params - dict keyed by field name of values
  • extraParams - any extra fields that you have created beyond the normal ais message fields
Returns: sqlhelp.insert
insert class instance

To Do: allow optional type checking of params?

Warning: this will take invalid keys happily and do what???

latexDefinitionTable(outfile=sys.stdout)

source code 
Return the LaTeX definition table for this message type
Parameters:
  • outfile (file obj) - file like object to print to.
Returns: str
LaTeX table string via the outfile

testParams()

source code 
Return a params file base on the testvalue tags.
Returns: dict
params based on testvalue tags

Variables Details [hide private]

fieldList

Value:
('MessageID',
 'RepeatIndicator',
 'UserID',
 'Spare',
 'dac',
 'fid',
 'efid',
 'month',
...

fieldListPostgres

Value:
('MessageID',
 'RepeatIndicator',
 'UserID',
 'Spare',
 'dac',
 'fid',
 'efid',
 'month',
...

toPgFields

Go to the Postgis field names from the straight field name
Value:
{'latitude': 'stationloc', 'longitude': 'stationloc'}

RepeatIndicatorEncodeLut

Value:
{'default': '0', 'do not repeat any more': '3'}

RepeatIndicatorDecodeLut

Value:
{'0': 'default', '3': 'do not repeat any more'}

datumEncodeLut

Value:
{'IGLD-85': '1',
 'LAT': '9',
 'MHW': '4',
 'MLLW': '0',
 'MLS': '5',
 'NAVD': '7',
 'NGVD': '6',
 'STND': '3',
...

datumDecodeLut

Value:
{'0': 'MLLW',
 '1': 'IGLD-85',
 '2': 'WaterDepth',
 '3': 'STND',
 '4': 'MHW',
 '5': 'MLS',
 '6': 'NGVD',
 '7': 'NAVD',
...

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