iMapBuilder supports adding curve lines using Longitude and Latitude coordinates, which is suitable for showing travel or flight routes. The software allows you to add curve lines manually on the grid, or import data from an Excel spreadsheet file.

Steps:

1. Select File->New in the toolbar. Click button in template wizard, a list of maps would be presented such as World countries, United States (Geo), and United States Mainland (Geo). Click on one of them to open a new project.
   
   

2. To add curve line, you can click on the icon and select Curve under 'Points and Lines' section. A pop up window is now displayed.
   
   
   
   
   
3. Fill in the information of cruve lines using Grid as below:
   
   Importing data from an Excel spreadsheet file
   You can import your data from an spreadsheet unicode text file (.txt) by pressing or click button to paste the data from clipboard. You can also click button to copy the data or export the data to Excel by pressing button.
   
   When clicking , a pop up window is displayed for you to load a data file in txt format, select a recent data file or load sample data.
   
   
   
   

   Column	Description	Sample
   Curve Name	The name of the curve line, a reference name shown in the item list of points and lines editing interface	Route 1
   Latitude (Start/End/Curvature)	The starting /ending/curvature latitude coordinate of the line, it should be in decimal degree format. If you have Latitude in degree/minute/second format, you are required to convert into this format first. Latitude will range from 90 to -90 where N is positive and S is negative	38.89
   Longitude (Start/End/Curvature)	The starting /ending/curvature longitude coordinate of the line, it should be in decimal degree format. If you have Longitude in degree/minute/second format, you are required to convert into this format first. Longitude will range from -180 to 180 where W is negative and E is positive	-77.02
   Line color	Web color value in hexadecimal notation (HEX), it can be retrieved in [Get color code] section.	#FF0000
   Line Thickness		6
   Line Opacity	The degree to which a line is opaque. Opacity ranges from 0 (fully transparent) to 100 (fully opaque)	100
   Start/End Symbol	The symbol at the start/end of the lines.	3
   URL	The URL Address when mouse clicking the line, leave it blank if not necessary	http://www.imapbuilder.com
   URL Target	The target for the URL Address, For example, "_blank" for new window, "_self" for same window	_blank
   Tooltip	The description text for the mouse over tooltip	Route 1