SCALGO Live Documentation

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User Interface - The Toolbar

The toolbar displays all the available tools in SCALGO live. You can extract information from several tools at the same time by keeping the respective information boxes open. The tool you are actively using is colored blue in the toolbar.

How to enable/disable a tool

  1. Select the particular tool, and click on the map to view the function of the tool at a specific point.
  2. Disable the tool by closing the information boxes that are activated by the particular tool. The information boxes may either be a graph and/or Point Info. Read more about the information boxes by each tool.

Zoom

Zoom is the default tool that eases your movement across the map. Whenever you disable another tool, the zoom tool will be activated. There are four ways to zoom:

  • Double-click where you want to zoom on the map
  • Hold shift and draw the area you want to zoom by pressing the left button of the mouse
  • Use the blue + and - buttons in the top right corner of the map.
  • Use the scroll wheel of your mouse

Point Query

Point Query obtains information about the data of the enabled layers or analyses. If there is no enabled analysis or layer, the Info box will only show the coordinates of the chosen point (you can change the coordinate system under User in the toolbar).

To query a point on the map:

  1. Choose the layers and analyses you want to extract information from
  2. Select Point Query in the toolbar
  3. Click on the location you want to query
  4. An Info box in the bottom right corner provides information about the layers you have selected.

If you want to know more about the information provided by Point Query, view the Point Info sections by the individual layers and analyses.

Profile

The profile tool is used to study the elevation of cross sections of the terrain across multiple DEMs. To create a cross section:

  1. Select 'Profile' in the toolbar
  2. Click on the map and draw a path where you want to view a cross section. You can insert vertices by single-clicking. The info box continuously shows the length of the path.
  3. Double-click to end the path.
  4. Click and pull anywhere on path to adjust its location.
  5. Select an elevation layer in the dock. You can enable several elevation models when using the graph.
  6. Select 'show profile' in the measurement box, and the profile will show.
  7. You now have the following options:
    • You can use the scroll-wheel on your mouse to zoom
    • You can use the plus/minus buttons on the top to adjust the size of the profile window
    • You can download the data by selecting the download button in the top bar. By default you will get Excel spreadsheet file, but you can change the format in the account dashboard.

Note: when you are moving your mouse along the graph, the exact coordinates and elevation will be displayed underneath the graph. At the same time, a dot will move along the path on the map and correspond to where your mouse is on the graph.

Uniform scale

There are two different ways to view the profile, either by default scale or uniform scale. The scales differs in the Y-axis: The default scale has a Y-axis a little higher and lower than the elevation in the profile. In the uniform scale shows . Enable the uniform scale at the top of the graph.

The profile tool is used to query the elevation of two terrain models. One of the models is a terrain-only model whereas the other model has had building footprints added, and the profile clearly shows the difference in elevation.

Freezing the profile

The elevation data displayed by the profile tool continuously follows the mouse position, so that you can quickly find points of interest. When you wish to copy and paste this data, or if you wish to make a screen shot, this is inconvenient. You can ask the profile tool to hold a given position by moving your mouse to the point of interest, right-clicking, and selecting Freeze position here from the context menu.

To go back to the dynamic display of elevation data, right-click again anywhere in the profile tool and select Unfreeze position.

Measuring gradients

You can ask the profile tool to display the gradient of the profile between two given points. Move the mouse to the starting point, right-click, and select Measure gradient from here from the context menu.

The table at the bottom of the profile tool will now be extended to show not only the elevation of the current point, but also the gradient with respect to the fixed black measuring point. The Distance line shows the horizontal distance (along the profile) between the current point and the measuring point in parenthesis.

Profile tool - measuring gradients
The profile tool when measuring gradients. The table at the bottom shows both elevations and the gradient with respect to the fixed black point.

You can change the measuring point by right-clicking a new point and selecting Measure gradient from here again. You can end the display of gradients by right-clicking and selecting Stop measuring gradients.

Watershed

The watershed tool lets you click anywhere on the terrain and see the upstream area of that point (green) and the downstream path from the point (red or dark blue).

How to use the watershed tool:

  1. Select watershed in the toolbar.
  2. Choose which analysis you want to use, Flash Flood Mapping or Depression-free flow, in the drop-down menu. If you have made a scenario analysis on your workspace, then this tool will also be available for your workspace. The tool can be found beneath the name of the workspace. Only an analysis currently shown in the dock are accesible by the watershed tool.
  3. Now choose a point on the map to see its watershed

Flash Flood Mapping

This analysis illustrates the water flow of your selected point to the first disconnected river network or to a depression large enough to hold your selected amount of rain water. If you want to use the watershed tool with flash flood mapping, remember to select flash flood mapping in the drop down menu.

The map may look something like this:

The map shows how a watershed can be displayed.

The different areas illustrates the following:

  1. The green area is the watershed of the selected point.
  2. The red area illustrates the flooded area at the selected rain event.
  3. The dark blue illustrates a downstream area from the selected point to another point.

The different shades of blue indicates the water depth in an area - the darker the blue, the deeper the water. The downstream area will often flow to a watercourse, a river or the sea, but in some cases, it ends in e.g., a field - as seen on the map above in light blue.

In the example above, the light blue area is where the downstream area ends and where the river network disconnects. If you select the light blue area with the watershed tool, you will see that your previous selected area is part of the watershed of the light blue area.

Slider: Setting the rain event

Use the slider to set the rain event you want to investigate. When your increasing the rain slider, the watershed enlarges as more water will flow through the watershed.

Watershed: Viewing information about watershed

When using the watershed tool, an information box, Watershed info, will show. Watershed Info informs about:

  • Upstream area: the size of the watershed.
  • Depression storage: the amount of water which is stored in the watershed
  • Runoff volume: The amount of water that flows through the point as runoff at the given rain event.

In general, the depression storage and runoff volume combined equal the volume of precipitation falling in the watershed.

Depression-free flow

When using the Depression-free flow layer, the map will automatically regard all depressions as ‘filled’ and therefore, the surface water will be directed to the nearest sea. If you want to use the watershed tool with the Depression-free flow analysis, remember to select Depression-free flow in the drop down menu.

Contrary to the illustration above (showing the flash flood analysis), this watershed, which uses the depression-free flow analysis, is directed all the way to the ocean.

If you use flash flood mapping and set the rain event slider to very large number you will see that the Depression-free flow and Flash Flood Mapping shows the same. As all depressions are filled by rain, it is therefore flowing all the way to the ocean.

When using the watershed tool, Watershed Info will show:

  • The location of your selected point.
  • The size of the upstream area of the watershed.

Workspaces

Please consult the workspace section of the documentation to understand how to use workspaces.

Export

Downloads

Almost every data or analysis can be downloaded from SCALGO Live. To download data, use the following process:

  1. Select the export in the toolbar and then select download data in the dropdown.
  2. Select the area you want to download:
    • you can select a simple rectangle
    • draw an arbitrary polygon
    • or drag a polygon (shape or geojson format) directly into your window.
  3. Single-click to start drawing an arbitrary polygon.
  4. Single-click to add new vertices.
  5. Double-click to stop drawing.
  6. Hit the download icon next to the layer you want to download. If the icon does not appear, the particular layer you have selected is not available for download.
  7. Select options for what data you want, most importantly if you want raster or vector data (if applicable). A choice of projection and file format is also available if needed.

Export Map

If you want to export an image of your map as a PDF or as a JPEG image you can use this tool. It has a simple mode that lets you pick the region you want and gives you an image back and an advanced version that allows you to select a page size, scale and resolution for your export.

Address

Address enables you to search for a particular address.

  1. Select the button Address
  2. Type an address and press one of the options provided by the tool.
  3. The map will show the address you have typed in.

Alternatively, you can paste in the coordinates of a point (separated by a comma) in the currently selected coordinate system to zoom to the point right away.

Help

Help give you access to the manual, support and to our getting started guide

  • Getting started directs you to our collection of getting started videos.
  • Open Manual directs you to this manual
  • Get Support directs you to our support page, where contact information is located in case the manual does not suffice.

User

User gives you the ability to:

  • Choose theme; if you have access to more than one setup, e.g. both Denmark and Sweden.
  • Determine which type of coordinates, you wish displayed in Point Info. The options are different depending on your country.
  • Access account settings. Here you will access account management and be able to:
    • view and change user information
    • view workspace information.
    • Duplicate, share or extract terrain-edits from one or more workspaces
      change password
    • View the users of your organisation
    • See whether you have access to any add-ons
  • Log out of SCALGO Live