Surface Elevation Tool

The Surface Elevation Tool can be used to analyse the surface elevation profile from one point to another to determine line-of-sight, and to work out the feasibility of a wireless bridging link.

(Note: This application's data–provided by Google–represents a modest approximation of terrestrial elevation but generally does not factor in circumstantial obstructive details (such as buildings and trees) so this should be factored in when considering the profile.)

Usage instructions

• Click on the map to place a marker on the map to define the first point for the elevation profile.
  Optional: You can start by entering and submitting a location (such as a post code, address, or city name) in the search box, this will centre and zoom the map to the designated position.
• Click on the map again at a second location to place another marker for the profile...
• The application will draw a line between the two markers–to illustrate the signal path–and a chart will be drawn below the map representing the land elevation profile from the left marker to the right.
  Note: Curvatures of the line on the map actually represent the most direct path between the two points after considering the curvature of the Earth. Also note that the Earth's curvature could itself obstruct the line-of-sight between two points, please consider this when profiling a point-to-point link to the other side of the globe.
• The signal path line overlay (shown on the chart in red) represents the direct line-of-sight. This can be hovered over to show a marker on the map to determine where the portion of the profile relates geographically.
• Any marker can be picked up and moved to refine or redefine a location; the chart will update accordingly.
• Should you need to define a height where the prospective base-unit is going to sit above ground level (e.g., attached to a pole or a building), you can click on either of the markers to set this height. After entering, the line-of-sight profile on the chart will be updated accordingly.
  Tip: This feature could be utilised to compensate for where the surface profile does not account for buildings.

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