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Greetings Cathy, This sometimes happens for certain video cards. Luckily, there is an easy fix. Please see http://www.unidata.ucar.edu/software/idv/docs/userguide/Faq.html#spiderweb for the details. If that does not work, please let me know. Cheers! Sean > Hello! I'm sure there is an easy answer to this. I'm a beginner working > with IDV, and I notice that on the display a lot of green lines will show up > (vectors).. So for instance, I might start with a simple coastline map of > CONUS, where the coastline is in green, but once I start adding images and > working with it, the extra green lines show up, often radiating from one > point. Any idea how to solve this problem? Thanks. Cathy > Ticket Details =================== Ticket ID: BTB-920714 Department: Support IDV Priority: Normal Status: Open