Skill Drill: Clipping the Crime Data to the Census LA County Boundary

You may notice that some of the crime data points fall outside of the LA County boundary. There are also some crime records with no geographic coordinates. To clean up the data, clip the crimes layer and use the Los Angeles County boundary as the clip feature. This clip operation ensures that your density surface model serves your needs while excluding the data points outside of your areas of interest.

An image of the clipped crime data added to ArcMap
The data is clipped to the LA County boundary to remove any outliers or data without a geographic reference.