Spark Notebook: Does GeoPointsChart accept a Dataframe?

Question

I have a Dataframe which has two columns latitude and longitude. I passed that to GeoPointsChart. The output is "showing 1000 rows" but it isn't actually showing me anything. Has anyone faced the same issue? Is this a syntactical mistake?

Answer 1

I have not worked with this notebook, but it looks like you have an API call somewhere producing a java.util.List. That class does not have a toSeq method. You want to convert java.util.List into its Scala equivalent.

First, import this:

import scala.collection.JavaConverters._

This import enriches (or pimps) the Java collections with an asScala method to do the conversion:

val testAsScala = test.asScala.toSeq

I would note though that the call to toSeq is unnecessary since the result already mixes in Seq. Still, with asScala you can now work entirely with Scala collections, which are so much easier.