Contour map

[DillomiUcharm]

Hello,

I am new in ArcGIS and for now I am working with bathymetry data. I am able to import csv file, make shape file, interpolate then make contour from raster.. However, the problem I'm facing now is that, whenever I do a contour, the program will assume or calculate outside of the actual data points and this gives odd lines outside of the actual data points. How can i clean those out and make my map look nice and neat?

Thank you

[XanderBakker]

You can create a polygon with the area of interest and clip the data. This polygon feature class can also be used in your environment settings as mask.

[DillomiUcharm]

Thank you for your help, but since I am new to arcgis can you please be more specific on how I can go about creating polygon and clipping the data? Or if you know of any site with written instructions on the topic please share.

Thank you very much.