opened
jsheedy
username_0
When viewing an orthographic projection which does not fill the viewport, points not on the globe are sometimes rendered with a single color from the colormap. For example from [Issue #16](https://github.com/VulcanTechnologies/d3-grid-map/issues/16):

![background issue](https://cloud.githubusercontent.com/assets/52426/26737192/fa891ad6-477d-11e7-8f9d-ad580d137ab1.jpg)

This doesn't occur for every data set. In particular, it doesn't seem to happen for the sparse data sets in the demo. The inverse projection may be picking up a cell from the extremities of the Grid.
Background of orthographic view is a single color from the colormap
issue