Short user manual for Gridvisual

GridVisual draw 3D topographies with color layers corresponding to different properties. It can calculate the network drainage, and allow you to select drainage basins. It makes film from the landscape evolution model €ros … and many other things for geomorphologists.

Most of the operations are triggered by mouse buttons. The following table gives you the main action

 

Left button

Right button

No press on keyboard Move the grid along X or Y Rotation along X or Y axis
SHIFT Change sea level Rotation along Z axis
CTRL Grid displacement along Z Light
ALT displacement of the 1st point on top of the grid same for the 2nd point
ALT et SHIFT displacement of the 1st point up- or downstream same for the 2nd poi

Keyboard

The arrow keys give intuitive results with 7 defined action modes

  • grid: move the grid
  • rotation : rotate the grid
  • light : change lightning
  • sea : change sealevel
  • network : displace a point along stream (useful to define stream profiles)
  • basins : (un)select drainage basin (if the drainage network has been calculated)

Key Z (z, resp.) increases (decreases, resp.) the vertical scaling of topography.

Key ctrl-e and ctrl-shift-e change the surface reflectivity and thus modify the color contrast.

Key “5” reorientate topography with pre-established orientation models
etc..

Functions

Colors

The software allows you to “paint” two information layers on top of topography. 8 layers are predefined:

  • topography
  • river
  • sediment
  • humidity
  • drainage area
  • basin
  • lithology
  • file The selection can be made from windows or by pressing the bold letter of the above list.

Drainage network

The drainage network can be calculated by pressing the corresponding icone of the upper toolbar. You can calculate along stream profiles, and save them in a file (by copy/paste the “Result” panel)…

Association with EROS

Gridvisual is particularly well suited to work with the Eros files. Eros is a landscape evolution model that calculate the dynamics of a geomorphic system. Gridvisual allows you to visualize topographies and resulting layers.