SMS:Observation Coverage Dialog

From XMS Wiki - http://wikis.aquaveo.com/xms/

The Observation Objects dialog has two sections used to define the attributes of the points and arcs created in the observation coverage. To open the Observation Coverage dialog:

1. Make the observation coverage active in the Project Explorer
2. Select the Create Feature Point or Create Feature Arc tool from the Dynamic Toolbar
3. Select a feature point or feature arc
4. Select the menu command Feature Objects | Attributes or double click in the previous step

Contents 1 Dialog Layout 2 Observation Point Attributes 3 Observation Arc Attributes 4 Related Topics

Dialog Layout

The options in the dialog will differ slightly based on the feature object type currently being edited (arc or point). The feature object type is specified using the combo box in the upper right of the dialog.

In addition to a unique Name and Data Set(s), two other parameters are used to define the data represented by a measurement: Trans and Module. When analyzing data that varies through time, select the Trans toggle. The Module of a measurement refers to the SMS module where the computed data is stored. (The Module is set by default and normally does not need to be changed.)

Observation Point Attributes

When "points" is selected in the Feature object type combo box, the top section of the dialog is entitled "Measurements" and the bottom section is entitled "Observation Points." The Measurements section is used to specify which data sets correspond with the observed data entered in the Observation Points section. The Measurements section is used to enter the observed data at each point. Each observation point is assigned the following attributes:

• Color - Color of the observation point.
• Observe - Turn the observation point on or off.
• Name - Name of the observation point.
• X - X-location of the point.
• Y - Y-location of the point.
• Observed Value - Value measured in the field corresponding to the active measurement.
• Interval - Allowable error (±) between the computed value and the observed value. Model verification is achieved when the error is within the interval (±) of the observed value.
• Angle - When a measurement for observation points is tied to a vector data set (as is the case with a Velocity measurement) an angle needs to be specified. This angle is an azimuth angle with the top of the screen representing north when in plan view.

Observation Arc Attributes

If "arcs" is selected in the combo box, then the top spreadsheet had the name "Flux Measurements" and the bottom spreadsheet has the name of "Observation Arcs."

To define an arc measurement, the Name must first be defined. In addition to a unique Name, a scalar and vector data set must be assigned to it. Two other parameters are also used to define the data represented by a measurement: Trans and Module. When analyzing data that varies through time, select the Trans toggle. The Module of a measurement refers to the SMS module where the computed data is stored. (The Module is set by default and normally does not need to be changed.)

Each observation arc is assigned the following attributes:

• Color - Color of the observation arc.
• Observe - Turn the observation arc on or off.
• Name - Name of the observation arc.
• x-origin - X origin of the arc (used to modify the x-value used in plots).
• Observed Value - Value measured in the field corresponding to the active measurement.
• Interval - Allowable error (±) between the computed value and the observed value. Model verification is achieved when the error is within the interval (±) of the observed value.

Related Topics

• Observation Coverage
• Plot Wizard