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Data Settings

The Data Settings window in the Map Viewer Module allows you to review the attributes of vector data layers that have been added to the map, including station groups, sample sets [HGA+ only], spatial queries, and imported shapefiles.  The Data Settings window also allows you to control the scope of project data-driven layers (i.e. station groups and sample sets) as described below in the aggregating data section.

The Data Settings window can be accessed hgafor the selected layer by clicking the Attributes button in the Layer Tree toolbar.

 

 

 

The Data Settings window has two components:

Toolbar: allows you to modify the attribute table of the selected map layer and is only available if the selected map layer is a station group or sample set.

Data view: allows you to review the attribute data and includes the standard data filters available in Hydro GeoAnalyst so that you can quickly find data of interest.

 

Toolbar

The Data settings toolbar (only available if the selected layer is a station group or sample set) provides controls for altering the scope and structure of the attribute table:

 

Aggregate data: allows you to change the scope of the data set and aggregate the data.
 

Select Parameter: lists and allows you to select the relevant parameter if the Minimum or Maximum aggregate data option is selected and is not shown otherwise.

Add Parameter: allows you to add one or more parameters as an attribute field.

Remove Parameters: allows you to remove one or more added parameters from the attribute table

Change units: allows you to change the measurement units of an added parameter in the attribute table (e.g. from mg/L to meq/L)

Refresh data: refreshes the data in the attribute table and map.

 

Calculated parameters cannot be added to the attribute table; however, you can save values from a calculated field into the sample table using the save values button in the Sample Results toolbar of the Sample List view and subsequently add the resulting sample parameter to the attribute table.

 

Aggregating Data

The Aggregate data dropdown in the Data Settings window allows you to change the data scope of the active sample set or station group and aggregate sample data based on the selected criteria. The following options are available:

 

Station: one record will be displayed per station that is part of the selected station group or sample set. The attribute table will include a sequential record ID, the X- and Y-coordinates of the station, the station parameters (i.e. data fields from the station list), and any parameters that have been added using the toolbar. This is the default data aggregation setting for added station groups.
 

AllSamples: one record will be displayed per sample that belongs to the selected station group or sample set. The attribute table will include a sequential record ID, the X- and Y-coordinates of the station, the sample parameters (i.e. data fields from the sample list), and any parameters that have been added using the toolbar. This is the default data aggregation setting for added sample sets.
 
Stations in the selected sample set/station group that have multiple samples for a given station will result in multiple records in the attribute table and overlapping symbols on the map. For improved map performance and visual clarity, it may be useful to use one of the remaining four options which are guaranteed to produce one sample record per station.

 

Earliest: one record will be displayed for the first sample collected at each station that belongs to the selected station group or sample set - The earliest sample is defined as the sample with the oldest sample date value in the station list. The attribute table will include a sequential record ID, the X- and Y-coordinates of the station, the sample parameters (i.e. data fields from the sample list), and any parameters that have been added using the toolbar.
 

Latest: one record will be displayed for the most recent sample collected at each station that belongs to the selected station group or sample set - The latest sample is defined as the sample with the newest sample date value in the station list. The attribute table will include a sequential record ID, the X- and Y-coordinates of the station, the sample parameters (i.e. data fields from the sample list), and any parameters that have been added using the toolbar.
 

Minimum: one record will be displayed for the sample collected at each station that belongs to the selected station group or sample set with the lowest measured value of the selected parameter. If more than one sample is returned per location because multiple samples have the same lowest value for the same parameter, then the first such record encountered will be returned. The attribute table will include a sequential record ID, the X- and Y-coordinates of the station, the sample parameters (i.e. data fields from the sample list), and any parameters that have been added using the toolbar. If it is not already included, the minimum parameter will be added to the attribute table.
 

Maximum: one record will be displayed for the sample collected at each station that belongs to the selected station group or sample set with the highest measured value of the selected parameter. If more than one sample is returned per location because multiple samples have the same highest value for the same parameter, then the first such record encountered will be returned. The attribute table will include a sequential record ID, the X- and Y-coordinates of the station, the sample parameters (i.e. data fields from the sample list), and any parameters that have been added using the toolbar. If it is not already included, the maximum parameter will be added to the attribute table.
 

Please Note: you must click the refresh [] button to apply any changes to the aggregate data options.

 

 


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