NAV CANADA has developed digital production process for the terrain layers of all VNC and VTA charts. There are limited choices in the technology that can generate digital hill shades. As well the combination of digital terrain and hill shading produces unacceptable chart clutter. As part of our analysis we reviewed VFR chart best practices from around the globe. As a result of the current technology limitations, clutter and best practices the shading will not be incorporated into the VNC and VTA charts series effective immediately.

NAV CANADA will continue to reassess shading technology as improvements occur.

For a current list of charts that have been released with updated terrain layers and hill shading, please see the list of charts below with an asterix.