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Delft-FEWS, installed by Deltares, operates as backend of the system, collecting and organising the data recorded by the available hydro-meteorological stations.
The database is connected with the frontend of the Hydromet Portal (Dewetra) through dedicated API, described below.
¶ Delft-FEWS API
Connection between the backend (Delft-FEWS) and the frontend (Dewetra) operates through dedicated API.
The following query, for example:
http://10.137.8.32:8080/FewsWebServices/rest/fewspiservice/v1/timeseries?startTime=2023-05-15T00:00:00ZZ&endTime=2023-05-15T01:00:00ZResult in a list of records in the 15 May 2023 00:00 to 15 May 2023 01:00 time window (UTC) from the available sensors:
<TimeSeries xmlns="http://www.wldelft.nl/fews/PI" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:fs="http://www.wldelft.nl/fews/fs" xsi:schemaLocation="http://www.wldelft.nl/fews/PI http://fews.wldelft.nl/schemas/version1.0/pi-schemas/pi_timeseries.xsd" version="1.32">
<timeZone>0.0</timeZone>
<series>
<header>
<type>accumulative</type>
<moduleInstanceId>Import_Precipitation</moduleInstanceId>
<locationId>10</locationId>
<parameterId>P.obs</parameterId>
<timeStep unit="nonequidistant"/>
<startDate date="2023-05-15" time="00:00:00"/>
<endDate date="2023-05-15" time="01:00:00"/>
<missVal>-999.0</missVal>
<stationName>Union Vale Estate</stationName>
<lat>13.81139</lat>
<lon>-61.05596</lon>
<x>-61.05596</x>
<y>13.81139</y>
<units>mm</units>
</header>
</series>
<series>
<header>
<type>accumulative</type>
<moduleInstanceId>Import_Precipitation</moduleInstanceId>
<locationId>2</locationId>
<parameterId>P.obs</parameterId>
<timeStep unit="second" multiplier="600"/>
<startDate date="2023-05-15" time="00:00:00"/>
<endDate date="2023-05-15" time="01:00:00"/>
<missVal>-999.0</missVal>
<stationName>CARDI</stationName>
<lat>13.94596</lat>
<lon>-60.92139</lon>
<x>-60.92139</x>
<y>13.94596</y>
<units>mm</units>
</header>
<event date="2023-05-15" time="00:00:00" value="-999.0" flag="8"/>
<event date="2023-05-15" time="00:10:00" value="-999.0" flag="8"/>
<event date="2023-05-15" time="00:20:00" value="-999.0" flag="8"/>
<event date="2023-05-15" time="00:30:00" value="-999.0" flag="8"/>
<event date="2023-05-15" time="00:40:00" value="-999.0" flag="8"/>
<event date="2023-05-15" time="00:50:00" value="-999.0" flag="8"/>
<event date="2023-05-15" time="01:00:00" value="-999.0" flag="8"/>
</series>Query is performed every 5 minutes. Result of the query is organised in the backend DB, for following visualisation in Dewetra. In the image below, temperature records at Hewanorra station.
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