Map Contour Plot Data Function for Spotfire®

Please download the Map Contour Plot Data Function for Spotfire®  from the exchange. 

Overview

This Data Function generates a contour plot as a feature layer on a map chart.  The download contains a data function you can import into your own .dxp and a template you can bring your own data into. 

Details about the data function

Technique used: Polynomial Regression Smoothing
Programming Language: TERR 6.0.3/R4.3.1
Required Packages: None
Description: Draw contour lines on a surface using local polynomial regression smoothing.
Inputs:

• x - column of real number values indicating x coordinates or longitudes

• y - column of real number values indicating y coordinates or latitudes

• z - column of real number or integer values data, optionally containing missing values

• smooth.scale - scalar real number value controlling the degree of smoothness. The default is 0.5 if no value is supplied.

Outputs:

• contours - table with 2 columns

  • Level - the contour line level

  • Geometry - WKB binary representation of the contour line

Reference Info

• You can find more information about contour lines in this article. 
• Below is the video on how to use this data function:

• For an overall overview of the GeoAnalytics or Location Analytics capabilities of Spotfire please also review this page.
• Useful Geospatial Data Functions for Spotfire