A.1 GeoDatum
DELFT-FEWS may use a number of national coordinate system as geo-datum. These are referenced by all configurations requiring a definition of geodatum.
All coordinates are handled internally as WGS 1984 (longitude-latitude). To add a new coordinate system to DELFT-FEWS, the transformation between WGS-1984 and that system will need to added as Java class to DELFT-FEWS
The lists of GeoDatum supported are:
+ WGS 1984 (Geographic projection; longitude-latitude)
+ SVY21 (Singapore)
+ Ordnance Survey Great Britain 1936 (Great Britain)
+ CH1903 (Switzerland)
+ Rijks Driehoekstelsel (The Netherlands)
+ Gauss Krueger Austria M34 (Austria)
+ Gauss Krueger Austria M31 (Austria)
+ Gauss Krueger Meridian3 (Germany)
+ TWD 1967 (Taiwan)
Plus other organisation specific coordinate conversions.
The user can also specify the UTM zone - this should be in the form UTM48N or UTM48S. The zones are shown below:
A.2 Time Zones
DELFT-FEWS supports a number of time zones:
Name | Decription | GMT equivalent |
MIT | West Samoa Time | winter and summer:GMT-11 |
HST | Hawaii Standard Time | winter and summer:GMT-10 |
AST | Alaska Standard Time | winter:GMT-9 summer:GMT-8 |
PST | Pacific Standard Time | winter:GMT-8 summer:GMT-7 |
MST | Mountain Standard Time | winter and summer:GMT-7 |
MST7MDT | Mountain Daylight Saving Time | winter: GMT-7 summer:GMT-6 |
PNT | Mountain Standard Time | winter and summer:GMT-7 |
CST | Central Standard Time | winter:GMT-6 summer:GMT-5 |
EST | Eastern Standard Time | winter and summer:GMT-5 |
IET | Eastern Standard Time | winter:GMT-5 summer:GMT-4 |
PRT | Atlantic Standard Time | winter and summer:GMT-4 |
CNT | Newfoundland Standard Time | winter:GMT-3:30 summer:GMT-2:30 |
AGT | Argentine Time | winter:GMT-3 summer:GMT-2 |
BET | Brasilia Time | winter:GMT-3 summer:GMT-2 |
| GMT/BST | UK British time | winter:GMT+0 summer:GMT+1 |
WET | Western European Time | winter:GMT+0 summer:GMT+1 |
CET | Central European Time | winter:GMT+1 summer:GMT+2 |
MET | Middle Europe Time | winter:GMT+1 summer:GMT+2 |
CAT | Central African Time | winter and summer:GMT+2 |
EET | Eastern European Time | winter:GMT+2 summer:GMT+3 |
EAT | Eastern African Time | winter and summer:GMT+3 |
AZT | Azerbaijan Time | winter:GMT+4 summer:GMT+5 |
NET | Armenia Time | winter:GMT+4 summer:GMT+5 |
PLT | Pakistan Time | winter and summer:GMT+5 |
IST | India Standard Time | winter and summer:GMT+5:30 |
BST | Bangladesh Time | winter and summer:GMT+6 |
VST | Indochina Time | winter and summer:GMT+7 |
PRC | China Standard Time | winter and summer:GMT+8 |
JST | Japan Standard Time | winter and summer:GMT+9 |
ROK | Korea Standard Time | winter and summer:GMT+9 |
ACT | Australia Central Time (Northern Territory) | winter and summer:GMT+9:30 |
AET | Australia Eastern Time (New South Wales) | winter:GMT+10 summer:GMT+11 |
AWT | Australia Western Time | winter:GMT+8 summer:GMT+9 |
ACST | Australia Standard Central Standard Time | winter and summer GMT+9:30 |
AEST | Australia Eastern Standard Time | winter and summer GMT+10 |
SST | Solomon Is. Time | winter and summer:GMT+11 |
NST | New Zealand Standard Time | winter:GMT+12 summer:GMT+13 |
You can now specify any timezone in relation to GMT e.g.
<timeZone>
<timeZoneName>GMT+9</timeZoneName>
</timeZone>
A.3 Units
DELFT-FEWS supports a list of units. Most of these are SI units.
Unit | Description |
m | Metres |
mm | Millimetres |
m3/s | Cubic meters per second |
oC | Degrees Centigraed |
mm/hr | Millimetres per hour |
% | Percentage |
g |
|
s |
|
degrees | Degrees (directional) |
Bft | Beaufort |
m/s | Metres per second |
- | Dimensionless |
W/m2 | Watts per metre squared |
A.4 Data quality flags
Quality flags are constructed on a philosophy of two qualifiers. The first describes the origin of the data and the second the quality.
Possible origins of data are:
+ Original: This entails the data value is the original value. It has not been amended by DELFT-FEWS
+ Completed: This entails the original value was missing and was replaced by a non-missing value.
+ Corrected: This entails the original value was replaced with another non-missing value.
Possible qualifiers are:
+ Reliable: Data is reliable and valid
+ Doubtful: The validity of the data value is uncertain
+ Unreliable: The data value is unreliable and cannot be used.
Following this specification, the table below gives an overview of quality flag enumerations
Table 1 Enumeration of quality flags
Enumeration | Description |
0 | Original/Reliable |
1 | Corrected/Reliable |
2 | Completed/Reliable |
3 | Original/Doubtful |
4 | Corrected/Doubtful |
5 | Completed/Doubtful |
6 | Original/Unreliable |
7 | Corrected/Unreliable |
8 | Completed/Unreliable |
9 | Missing value in originally observed series. Note this is a special form of both Original/Unreliable and Original/Reliable. |
Notes:
- No difference is made between historic and forecast data. This is not considered a quality flag. The data model of DELFT-FEWS is constructed such that this difference is inherent to the time series type definition.
A.5 Synchronisation Levels
To allow optimisation of data flows in DELFT-FEWS when set-up in a distributed environment, synchronisation levels (synchLevel) can be defined. These synchronisation levels are integers. The behaviour of each synch level is determined through the configuration of the synchronisation channels and synchronisation profiles. When required additional synchronisation levels can be added to further refine the synchronisation process. The current convention is;
synchLevel | description | application |
|---|---|---|
0 | All (scalar) data from a forecast run. Since 2012.02 this is the default for simulated. Before 2012.02 this synch level was used as default for all types | all systems |
1 | Scalar time series imported from telemetry. Since 2012.02 this is the default for external timeseries. NB the length of data synchronised will depend on the login-profile selected. Typically this will be data generated up to 7 days ago | all systems |
2 | All grid data from a forecast run (e.g. Flood Mapping results) | all systems |
3 | Large volumes of scalar data such as CatAvg data (forecasts, actuals & NWP) | all systems |
4 | Used for data imported infrequently such as Astronomical or Climatological data | all systems |
5 | Data edited on OC. Since 2012.02 this synch level is automatically used on OC. Configuration no longer required. | all systems |
6 | (small) Grid data imported from external forecast (synchronised to OC) | all systems |
7 | Grid data imported from external forecast (synchronised to FSS & MC only, and not to OC) | all systems |
8 | Performance indicator time series. These are time series that do not need to be synchronised with a short synchronisation interval or when a forecaster logs in with a minimum profile. | all systems |
9 | Temporary time series not requiring synchronisation. This synch level is automatically used for time series type temporary | all systems |
11 | Specific ModuleDataset files, which should be downloaded and activated directly after logging in and after each upload of a new version of the file (synch to OC). This is used in the Configuration manager when uploading the module dataset | most systems |
16 | (large) Grid data imported from external forecast (synch. to OC) | NFFS: to distinguish between small (synchLevel 6) and large grids |
20 | WarmStates (to be specified if there is need to synch to OC - needed for local runs in IFD) | all systems |
21 | Aggregated grids (flows/heads) forecasts | used in NGMS |
22 | Grids data (heads) timeseries | used in NGMS |
23 | Grids data (flows) timeseries | used in NGMS |
30 | Timeseries modifiers | used in CHPS (NWS) |
90-100 | Reserved | used internally |
