Relief Map

What is a relief map? Is a three-dimensional representation, usually of terrain. When representing terrain, the elevation dimension is usually exaggerated by a factor between five and ten; this facilitates the visual recognition of terrain features.

What are features?

The features module enables the capture and management of features in Drupal. A feature is a collection of Drupal entities which taken together satisfy a certain use-case.

How do we measures sea levels?

With satellites and tide gauges. Satellites can record the level of oceans around the globe, while tide gauges are used to measure the height of water with respect to a fixed, nearby point on land. Oceanographers combine data from satellites and tide gauges to study global effects, like the rise in average sea level that results from climate change. But specific information about local features, like the relative depth of certain parts of New Orleans, derives from specific tidal-gauge readings. (Land can also rise and fall over long time periods, so changes in land level must also be taken into account.)

5 Cities above sea level In North America:

Death Valley

• Calipatria, California, USA [−56 m (−183.7 ft)]
• Coachella, California, USA [−22 m (−72.2 ft)]
• Desert Shores, California, USA [−61 m (−200.1 ft)]
• El Centro, California, USA

Compasses:

Maps: