Can you import an XYZ text file and create a digital terrain model?
Beyond that, extensions can be written to import any kind of data.
Current extensions for point importing:
http://extensions.sketchup.com/en/search/site/point
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This plugin by Didier Bur does just that.
Cloud v8.0bxx by Didier Bur / Updated by TIG — SketchUcation PluginStore