Issue https://github.com/koopjs/koop/issues/309 demostrated problem with projecting coordinates of zero-value. Tracked this down to truthy-test for null/undefined value in the projectCoordinates function. Replaced with explicit test for numeric value. Added unit tests.
Issue https://github.com/koopjs/koop/issues/309 demostrated problem with projecting coordinates of zero-value. Tracked this down to truthy-test for null/undefined value in the projectCoordinates function. Replaced with explicit test for numeric value. Added unit tests.