After you have created a location-aware analysis for a mobile app, you can add expressions that can determine your location in the analysis on the mobile device.
About this task
Perform this task first using an application to create a single-column data table, and then in
Spotfire Analyst using a data set that includes latitude and longitude columns.
Procedure
-
Create a single-column data table that contains a name row and one placeholder data row.
A CSV file with a single column called Placeholder and a data row containing any string as a placeholder does nicely. Save it with any name, such as Location.
-
Open
Spotfire Analyst, and then open your analysis from
Adding location capabilities for mobile users.
-
From the menu, click
.
-
In the
Add Data Tables dialog, click
, and then add your placeholder data table.
-
From the menu, click
, and create the following three calculated columns.
| Column name
|
Expression
|
Data type
|
| lat
|
${AppGeoLatitude}
|
Real
|
| long
|
${AppGeoLongitude}
|
Real
|
| isLocationSet
|
Not(${AppGeoLatitude} = 0.0 and ${AppGeoLongitude} =0.0)
|
Boolean
|
Results
You now have a data set with three calculated columns that you can use in a
Spotfire app to mark your current location. This is extremely useful in a map visualization designed for the
Spotfire mobile app.