DELFT-FEWS is a location oriented system. All time series data must be referenced to a (geographic) location. This location must be identified by its geographic coordinates within the coordinate system used. When available on the file system, the name of the XML file is for example:
Locations 1.00 default.xml
Locations Fixed file name for the locations configuration
1.00 Version number
default Flag to indicate the version is the default configuration (otherwise omitted).
Figure 23 Elements in the Locations configuration
geoDatum
Definition of the geoDatum used in defining the locations. This may be different than the geoDatum used in the displays. For enumeration of geoDatums, see Appendix B.
location
Root element for the definition of each individual location. Multiple entries may be defined.
Attributes;
- id: id of the location. This must be unique
- name: name of the location used in displays and reports
description
Optional description of the location. This description will appear as a tool-tip when hovering over the location in the map display.
shortName
Optional short name for the location. This string when available will replace the name in the time series display legend.
x
Geographic coordinate of the location (Easting)
y
Geographic coordinate of the location (Northing)
z
Optional elevation of the location above the global reference.
The elevation defined will be used for converting a parameter supporting local and/or global datum. By convention the data stored in the DELFT-FEWS database at the local datum. The elevation defined here is added when displaying./converting to a global datum.
The value defined for the elevation should be the gauge zero for river gauges where an exact level is important.
All time series data in DELFT-FEWS must be referenced to a location. This is the case for all data types (scalar, longitudinal, grids & polygons).
For Grids and Longitudinal profiles, additional information is required and defined in the grids and branches configurations respectively. For scalar and polygon time series no additional information is required.
