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DEM-App

This application allows users to explore Digital Elevation Model (DEM) Data stored in publically accessible locations in GeoTIFF format.

Installation

To install all required dependencies use yarn.

yarn

Development

The development server can be started using:

npm run dev

Building for production

To build the application, the following command can be used:

npm run build

The application bundle is now located in the dist directory.

Build options

For both dev and production builds it is possible to set a configuration option via an environment variables:

  • VITE_INITIAL_URL: This option will set the URL of the initially loaded TIFF to view. When this option is not set, the URL fragment is used. When this is not set as well, no inital TIFF is loaded and the is started in an "empty" state.
  • VITE_INITIAL_VISUALIZATION: The initially selected visualization. One of contours, shaded, and relief. Defaults to shaded.
  • VITE_INITIAL_COLORSCALE: The initially selected colorscale. See colormaps documentation for available colorscales. Defaults to jet.
  • VITE_INITIAL_MIN: The initial value for the minimum elevation. Defaults to 360.
  • VITE_INITIAL_MAX: The initial value for the maximum elevation. Defaults to 700.
  • VITE_INITIAL_OFFSET: The initial value for the elevation offset for contours. Defaults to 0.
  • VITE_INITIAL_SPACING: The initial value for the elevation spacing for contours. Defaults to 100.
  • VITE_INITIAL_VERTICAL_EXAGGERATION: The initial value for vertical exaggeration in relief rendering. Defaults to 1.
  • VITE_INITIAL_SUN_ELEVATION: The initial value for sun elevation in relief rendering. Defaults to 45.
  • VITE_INITIAL_SUN_AZIMUTH: The initial value for sun azimuth in relief rendering. Defaults to 45.