2D Contour - External Data

This contour-points routine generates 2D contours from point data stored in text files. Each record has the X-Y coordinates and a data value. The files can be comma-delimited or space-delimited. The control options are the same as the 2D contour options used in contouring measured data from a database.

To create a 2D contour using external data, click Plot> External Data from the main menu and select 2D Contour. The 2D Contour dialog box opens. Modify the contour properties on the Query tab, Interval tab, Format tab, Options tab, Grid tab, and Interpolation tab as desired. Click the OK button to save changes.

EnviroInsite can query online services from the United States Geological Survey (USGS) or Natural Resources Canada to create a Digital Elevation Model (DEM) data file that can be used as an external data file to plot a surface topography contour.